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Difference between Synchronous and Induction Motor

by Posted in Electrician Services

Both synchronous and induction machines work on AC supply, ie; they are AC machines. For AC machines, the basic requirement is to create a rotational magnetic field so that the rotor can rotate, and energy can be obtained. (mechanical for motor, electrical for alternator) Now, the difference between a synchronous machine and an induction machine is based on how the rotational magnetic field is utilized.

The three phase supply, when given to the stator windings, creates a rotating magnetic field. Now, the rotor of an induction machine is a group of short circuited windings where the rotating magnetic field is to act. The underlying principle is electromagnetic induction, similar to transformers – the rotor gets an induced current, that means – a current carrying loop inside the magnetic field. This makes the rotor rotate. But, if both rotating magnetic field and rotor rotate in the same synchronous speed, there will be no induced EMF inside the rotor, because the field will be then constant w.r.t the rotor, and for rotation, change in flux should be there.

Thus, the rotation happens with a “slip” between the rotor and the stator. The slip refers to the inability of the rotor to catch up with the (speed of) rotating stator magnetic field. Thus rotor will rotate, and output is obtained, if there is slip between the rotor and stator magnetic field. This is the principle of working of an induction machine.

Now, consider am utilizing the rotating magnetic field by making an electromagnet rotate as a rotor, which is fed with a DC supply. In such a case, the machine will run in synchronous speed, and this machine is called a synchronous machine. However, it is to be noted that due to inertia of the rotor, the rotor electromagnet cannot immediately respond to the rotating magnetic field. This means that the synchronous machine does not start by itself. To provide the starting torque, additional winding called “damper winding” is provided in rotor, which make the synchronous machine similar to an induction machine during starting. As the machine starts, the rotor naturally locks up with the rotating magnetic field and rotates in synchronous speed. This means that during normal running conditions, the damper winding will carry no current. (Similar to the rotor winding in an induction machine at synchronous speed)

Differences:

Here are the few Differences between Synchronous and Induction Motor

 

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Synchronous Motor and Methods of Starting a Synchronous Motors

by Posted in Electrician News

Electrical motor in general is an electro-mechanical device that converts energy from electrical domain to  mechanical domain. Based on the type of input we have classified it into single phase and 3 phase motors. Among 3 phase motors, induction motors and synchronous motors are more widely used. When a 3 phase electric conductors are placed in a certain geometrical positions (In certain angle from one another) then an electrical field is generated. Now the rotating magnetic field rotates at a certain speed, that speed is called synchronous speed. Now if an electromagnet is present in this rotating magnetic field, the electromagnet is magnetically locked with this rotating magnetic field and rotates with same speed of rotating field. Synchronous motors is called so because the speed of the rotor of this motor is same as the rotating magnetic field. It is basically a fixed speed motor because it has only one speed, which is synchronous speed and therefore no intermediate speed is there or in other words it’s in synchronism with the supply frequency.

Why is a synchronous motor not self starting?

At starting position of synchronous machine, the rotor could have any alternative position as shown here.

When rotor is initially at position (a):

The like pole of rotor will get repelled and the tendency of rotor will be to rotate in anticlockwise direction. But after some time the N-pole of rotor and S-pole of rotor comes face to face and will try to get attract with each other. Now, the tendency of rotor is to rotate in clockwise direction but the rotor have some mass and cannot attain such a high speed (synchronous speed) to that of stator’s rotating magnetic field. Hence, rotor remains at rest.

When rotor is initially at position (b):

Here, the unlike pole of rotor gets attracted but as explained earlier the rotor cannot attain synchronous speed immediately and remains at rest.

As a result, the average torque exerted on the rotor is zero. Due to the large inertia of the rotor, the rotor fails to rotate along with the stator poles. Hence again the difference of position of magnetic axis gets created and rotor gets subjected to quickly reversing torque. This is because the speed with which rotating magnetic field is rotating is so high that it is unable to rotate the rotor from its initial position, due to the inertia of the rotor. So under any case, whatever may be the starting position of the rotor, synchronous motor is not self starting.

Methods of Starting a Synchronous Motor

The synchronous machine, however, is not self-starting. The synchronous machine has to be rotated to near the synchronous speed of the stator before it can “catch” the stator field and begin rotating on its own. Basically there are three methods that are used to start a synchronous motor:

To reduce the speed of the rotating magnetic field of the stator to a low enough value that the rotor can easily accelerate and lock in with it during one half-cycle of the rotating magnetic field’s rotation. This is done by reducing the frequency of the applied electric power. This method is usually followed in the case of inverter-fed synchronous motor operating under variable speed drive applications.To use an external prime mover to accelerate the rotor of synchronous motor near to its synchronous speed and then supply the rotor as well as stator. Of course care should be taken to ensure that the direction of rotation of the rotor as well as that of the rotating magnetic field of the stator are the same. This method is usually followed in the laboratory- the synchronous machine is started as a generator and is then connected to the supply mains by following the synchronization or paralleling procedure. Then the power supply to the prime mover is disconnected so that the synchronous machine will continue to operate as a motor.To use damper windings or amortisseur windings if these are provided in the machine. The damper windings or amortisseur windings are provided in most of the large synchronous motors in order to nullify the oscillations of the rotor whenever the synchronous machine is subjected to a periodically varying load.

Each of these methods of starting a synchronous motor is described below in detail.

1. Motor Starting by Reducing the supply Frequency:

If the rotating magnetic field of the stator in a synchronous motor rotates at a low enough speed, there will be no problem for the rotor to accelerate and to lock in with the stator’s magnetic field.The speed of the stator magnetic field can then be increased to its rated operating speed by gradually increasing the supply frequency f up to its normal 50- or 60-Hz value. This approach to starting of synchronous motors makes a lot of sense, but there is a big problem: Where from can we get the variable frequency supply? The usual power supply systems generally regulate the frequency to be 50 or 60 Hz as the case may be. However, variable-frequency voltage source can be obtained from a dedicated generator only in the olden days and such a situation was obviously impractical except for very unusual or special drive applications.

Synchronous Motor

 

But the present day solid state power converters offer an easy solution to this. We now have the rectifier- inverter and cyclo-converters, which can be used to convert a constant frequency AC supply to a variable frequency AC supply. With the development of such modern solid-state variable-frequency drive packages, it is thus possible to continuously control the frequency of the supply connected to the synchronous motor all the way from a fraction of a hertz up to and even above the normal rated frequency. If such a variable frequency drive unit is included in a motor-control circuit to achieve speed control, then starting the synchronous motor is very easy-simply adjust the frequency to a very low value for starting, and then raise it up to the desired operating frequency for normal running.

When a synchronous motor is operated at a speed lower than the rated speed, its internal generated voltage (usually called the counter EMF) EA = K_! will be smaller than normal. As such the terminal voltage applied to the motor must be reduced proportionally with the frequency in order to keep the stator current within the rated value. Generally, the voltage in any variable-frequency power supply varies roughly linearly with the output frequency.

2. Motor Starting with an External Motor:

The second method of starting a synchronous motor is to attach an external starting motor (pony motor) to it and bring the synchronous machine to near about its rated speed (but not exactly equal to it, as the synchronization process may fail to indicate the point of closure of the main switch connecting the synchronous machine to the supply system) with the pony motor. Then the output of the synchronous machine can be synchronized or paralleled with its power supply system as a generator, and the pony motor can be detached from the shaft of the machine or the supply to the pony motor can be disconnected. Once the pony motor is turned OFF, the shaft of the machine slows down, the speed of the rotor magnetic fieldBR falls behind Bnet, momentarily and the synchronous machine continues to operate as a motor. As soon as it begins to operate as a motor the synchronous motor can be loaded in the usual manner just like any motor.

Synchronous Motor

 

This whole procedure is not as cumbersome as it sounds, since many synchronous motors are parts of motor-generator sets, and the synchronous machine in the motor-generator set may be started with the other machine serving as the starting motor. Moreover, the starting motor is required to overcome only the mechanical inertia of the synchronous machine without any mechanical load (load is attached only after the synchronous machine is paralleled to the power supply system). Since only the motor’s inertia must be overcome, the starting motor can have a much smaller rating than the synchronous motor it is going to start. Generally most of the large synchronous motors have brushless excitation systems mounted on their shafts. It is then possible to use these exciters as the starting motors. For many medium-size to large synchronous motors, an external starting motor or starting by using the exciter may be the only possible solution, because the power systems they are tied to may not be able to handle the starting currents needed to use the damper (amortisseur) winding approach described next.

3. Motor Starting by Using damper (Amortisseur) Winding:

As already mentioned earlier most of the large synchronous motors are provided with damper windings, in order to nullify the oscillations of the rotor whenever the synchronous machine is subjected to a periodically varying load. Damper windings are special bars laid into slots cut in the pole face of a synchronous machine and then shorted out on each end by a large shorting ring, similar to the squirrel cage rotor bars. A pole face with a set of damper windings is shown in Figure.

Synchronous Motor

 

When the stator of such a synchronous machine is connected to the 3-Phase AC supply, the machine starts as a 3-Phase induction machine due to the presence of the damper bars, just like a squirrel cage induction motor. Just as in the case of a 3-Phase squirrel cage induction motor, the applied voltage must be suitably reduced so as to limit the starting current to the safe rated value. Once the motor picks up to a speed near about its synchronous speed, the DC supply to its field winding is connected and the synchronous motor pulls into step i.e. it continues to operate as a Synchronous motor running at its synchronous speed.

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What is Synchronous Machine and Its Basic Working Principle

by Posted in Electrician Services

Synchronous Machine

Electrical motor in general is an electro-mechanical device that converts energy from electrical domain to mechanical domain. Based on the type of input we have classified it into single phase and 3 phase motors. Among 3 phase motors, induction motors and synchronous machine are more widely used. When a 3 phase electric conductors are placed in a certain geometrical positions (In certain angle from one another) then an electrical field is generated. Now the rotating magnetic field rotates at a certain speed, that speed is called synchronous speed. Now if an electromagnet is present in this rotating magnetic field, the electromagnet is magnetically locked with this rotating magnetic field and rotates with same speed of rotating field. Synchronous motors is called so because the speed of the rotor of this motor is same as the rotating magnetic field. It is basically a fixed speed motor because it has only one speed, which is synchronous speed and therefore no intermediate speed is there or in other words it’s in synchronism with the supply frequency.

Synchronous motors are available in self-excited sub-fractional horsepower sizes to high power industrial sizes.In the fractional horsepower range, most synchronous motors are used where precise constant speed is required. These machines are commonly used in analog electric clocks, timers and other devices where correct time is required. In higher power industrial sizes, the synchronous motor provides two important functions. First, it is a highly efficient means of converting AC energy to work. Second, it can operate at leading or unity power factor and thereby provide power-factor correction.

Synchronous speed:

 

The synchronous speed of a synchronous motor is given:

in rpm, by:

                       

and in rad·s−1, by:

                             

where:


 is the frequency of the AC supply current in Hz,

 is the number of poles per phase.

 is the pair number of poles per phase. 


/2

If 

 is the number of pole pairs per phase (rarely, planes of commutation) instead, simply divide both formulas by 2.

where f = supply frequency & p = no. of poles

Synchronous Machine

 

Synchronous motor is a doubly excited machine i.e two electrical inputs are provided to it. It’s stator winding which consists of a 3 phase winding is provided with 3 phase supply and rotor is provided with DC supply. The 3 phase stator winding carrying 3 phase currents produces 3 phase rotating magnetic flux. The rotor carrying DC supply also produces a constant flux.

 

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Chargepoint Home Flex EV Charger Installation Services

by Posted in Electrician Services

Electricians Review of the Chargepoint Home Flex

In the past few months, Root Electric has had quite a few requests to install wall connectors for newly purchased electric vehicles.  As more and more manufacturers are beginning to release electric vehicles, the demand for home charging solutions that will work with a variety of different vehicles is on the rise.  One new product of note is the ChargePoint Home Flex wall connector.  There are many technological features, such as the ChargePoint app that are easily understood from the standpoint of the average consumer.  However, since I am a professional electrician, I would like to review this product based on my knowledge and experience as an electrician.

The ChargePoint Home Flex is designed specifically so that the user can select the amount of electrical current drawn to charge the vehicle.  The range of current draw options for the ChargePoint Home Flex range from 16 Amps, all the way up to 50 Amps.  You may be reading this review thinking, “Well why would I want to set up the wall connector to charge my car at 16 Amps, when I can just set it to 50 Amps?” Well, that’s the correct question to ask, because it has the largest effect on the potential installation costs and future upgradeability of the installation.  I am going to delve into some of the more technical aspects of home EV charging for the benefit of the serious EV enthusiast.  Likewise, if you are an engineer reading this article, you may find that some of the more technical aspects are, let’s say, “general” for the sake of the less technically inclined. So if your mind begins to wander, or if the numbers aren’t tight to the NEC tables, please bear with me.  

One of the largest hindrances to installation of a home charging option for electric vehicles is the size of the electrical service on most homes in the United States.  Most homes in American suburbia are in the range of 50 years old or greater.  Most of these older homes have electrical services that range in size from 60 Amps to 150 Amps, while newer homes in most areas have a minimum service size of 200 Amps or greater.  The reason for this gradual increase in the size of home electrical services is the rise in reliance on electricity for cooking, refrigeration, heating, and cooling. In the mid 20th Century, most homes used fuel oil or natural gas for heat and cooking, but since the 1970’s, electricity has come to play a larger role especially because of the increased popularity of central heating and air conditioning.  Industry research has shown that the HVAC system in your home accounts for at least 30% of its energy consumption.  That said, many older homes that originally did not have air conditioning have since been upgraded to feature central air conditioning.  The rub is that while the HVAC system was upgraded, more often than not, the electrical service was left at its original size, which was not designed for the additional load of the air conditioning.  This leaves many older homes with an already maxed-out or overloaded electrical service that technically cannot handle additional load.  To make matters worse, many new homes are built with an electrical service that is pushed to its max.  So while the service may be rated at 200 amps, there may be precious little room for electrical upgrades. 

Customer Testimonial


Exemplary electrical work and customer service. This is the second time I have used Root Electric and they will continue to be my “go to” electrical contractor. The on-line estimate quote process works very well – there were no surprises. Bill Sr. gave me a 10:00 – 12:00 service window; he called at 10:00 to say he would arrive in 30 – 45 minutes. Bill wore a protective mask at all times, was very respectful and aware of social distancing. The two jobs were completed quickly. All in all, a real pleasure to work with.

Bruce G.


So what does this have to do with the installation with an electric vehicle?  Well it comes down to the amount of electrical current that a wall connector such as the ChargePoint Home Flex can pull.  At it’s full 50 Amp setting, the wall connector pulls as much electricity as your average kitchen electric range.  However, unlike your range, which is generally only being partially used (for example, you may only use one of the burners at once, or the oven itself without the cooktop), the EV charger is pulling its maximum current for hours at a time.  Because of this, electricians have to calculate the load placed on the electrical system to allow for the extended time high-current draw of the electric vehicle wall connector.  As an example, for standard residential electrical load calculations, your 50 amp range may only be calculated in at somewhere around 50% of its full load.  For easy math, that means if you have a 50 amp range, only 25 amps will be calculated into the total load placed on your electrical service.  This is because you are not using your range all of the time, and when you are, you are likely only using a fraction of its potential electricity draw.  A power connector for an electric vehicle, on the other hand, has to be calculated at 125% of its total draw.  This means that if you have a power connector rated at 40 Amps, you have to enter 50 amps to calculate the draw on the service.  If you have a newer home with gas heat and a 200 amp service, this won’t be a problem, but if your house was built in the 1950’s and has the original 60 amp service, and a central air conditioner installed in the late 1970’s, along with a remodeled kitchen, the service may not be able to support the load of the power connector without having to be upgraded.  This means additional expense on top of what you just spent on the car and on having the circuit and power connector installed.  (Although, if you have an older house, upgrading the service is a very good idea both for the long term safety and value of the home.)  

So where does all of this electrical mumbo-jumbo come in to play when it comes to the ChargePoint Home Flex?  Well, let’s say you just signed the lease on a shiny new Audi e-Tron and had Amazon deliver a new power connector to your doorstep.  Then you call an electrician to give you an estimate for installing a new 50 amp circuit, plus mount the new wall connector.  When he tells you that your service is not heavy enough to support the 50 amp load, you still have options to set the wall connector to 32 amps, 24 amps, or even 16 amps, and still have the option to increase the load to the full 50 amps in the future if you upgrade the service.  (Assuming the conductors feeding the power connector are large enough to support a 50 amp wall connector). 

Another advantage to having the option to pick the wall connector’s current draw is that you can choose how you want the wall connector to connect to your electrical system.  If you want maximum current draw at 48 or 50 amps for the fastest charge time, you can opt to have the ChargePoint Home Flex hardwired.  However, if you are willing to sacrifice a little bit of charging speed (limiting you to 40 amps or below) for the sake of being able to install more advanced power connectors in the future, you can have your electrician install a NEMA 14-50R or 6-50R outlet, which will work with just about every EV mobile connector or wall connector.  If you plan to sell your house in the near future, installing a 14-50R outlet or 6-50R outlet is a smart choice, since it will let the next homeowner install a power connector of their choice to power their own electric vehicle, which adds value to your home at the time of sale.  

If your head isn’t spinning by now, hopefully you now have a better grasp of the technical reasons of why the ChargePoint Home Flex is an excellent choice for a home EV charging power connector.  If you have an older home with a small electrical service, or even a newer home with a heavily loaded service, the ChargePoint Home Flex will give you options to safely charge your electric vehicle.  Additionally, it grants you the flexibility to set it up for fastest charging time or maximum future flexibility and upgradability.  There are many power connectors on the market, and while I am not in any way endorsing or promoting the ChargePoint Home Flex, I am saying that it would be worth a look for your electric vehicle charging needs.  

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Your Electrician in Prince William County: Root Electric

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Electrical Services in Prince William County

Root Electric’s commercial and residential electricians are proud to be considered some of the best in Prince William County. From electrical repairs and home improvements to office electrical repairs and commercial tenant improvement projects, Root Electric has been serving the residents and businesses of Prince William County for more than three decades. Over that time, we have become the electricians Prince William County residents and business owners have come to rely on, time and time again for the safest, highest quality electrical work in the county. Your safety and satisfaction are our top priorities!

With the average home age in the county standing at about 25 years old, with many homes much older than that, Root Electric has the expertise necessary to upgrade electrical systems in older homes to make them safer, more efficient, and better able to handle the increased electrical demands of modern life and all of its gadgets. With businesses throughout Prince William County updating older spaces for retail, office space and workshop space, our electricians are also highly skilled at updating and improving electrical safety for commercial spaces. 

So, whether you need a residential electrician or a commercial electrician, Root Electric is the one to call for the safest, up-to-code, high-quality electrical work anywhere in Prince William County. Whatever your electrical needs are, contact our Prince William County electricians at Root Electric today for any of the following projects: (703) 494-3989.

How We Became the Electricians Prince William County Trusts

Of course, we can say we’re the top electrician in Prince William County—it’s easy enough to say, but harder to prove. And, naturally, there are certain things you’ll want to look for in your choice of residential electrician or commercial electrician. For Root Electric, the proof is definitely in how we have served our customers over the last 30+ years. For us, it’s more about family than anything else. Root Electric is a family-owned and operated team of electricians who’ve grown up in Northern Virginia. We know the homes and businesses here, and we have a sense of history and a deep knowledge of what our customers need because we’re from here too. But how can you tell for sure that Root Electric is the Prince William County electricians for you? Here are 5 things you should always look into when you are searching for the best electrician in your area:

For starters, you can take a look through our customer testimonials for the real experiences that your neighbors have had with us. We wouldn’t have lasted three decades without a commitment to quality and safety that our customers deserve. You can also look through the awards we’ve earned from EBSCO, local reader’s choice awards and Angie’s List. Root Electric maintains an open dialogue with our electricians and customers to ensure customers are satisfied with our methods and quality of installation.We are also licensed, bonded and insured, which is an essential protection for all of our clients and our expert electricians. We also continue to invest in new equipment and technological upgrades so that we can provide the best quality and most advanced solutions for any electrical repairs, electrical upgrades, remodeling projects, office electrical repairs and tenant improvement projects.The bottom line is that our entire team at Root Electric is committed 100% to your safety and your total satisfaction with your electrical repairs or upgrades. We provide the most extensive and clear estimates (now offering virtual estimates as well) of any electrician in Prince William County because we believe you deserve to know exactly what needs to be done and how the prices break down before anything else happens. For Root Electric, clear communication with our customers is one of the hallmarks of our top notch customer service! We care about you because you’re our neighbors! And that’s how we approach every project.

Customer Testimonial


Great work that has paid off! Had them install a subpanel about two years ago so we could power our most essential circuits off the generator. With all the rain lately, a tree just took down the only power line into our neighborhood. But we are doing just peachy, even if it takes Dominion all night!

Adrian W.

Call the Best Electrician in Prince William County: (703) 494-3989

Our Prince William home electrical services and commercial electrical services also span the entire spectrum of any electrical upgrades, improvement projects, installations and electrical repairs your home or business may require. Take a look through the following list to see what types of electrical projects we can do. Then please feel free to contact us to ask questions, discuss your project and get an estimate: 

Prince William County Residential Electrical Services

Electrical upgrades for older homesElectrical panel and circuit breaker installationCircuit breaker and electric panel replacement Electrical sub panel installationLight fixtures and recessed lighting installation and upgradesCeiling fan installationExhaust fan installationOutlet installationHome office electrical upgradesPlug and switch repairs, upgrades and installations “Heavy ups” – complete home electrical upgradesNew home wiringReplace aluminum wiring in older homesElectrical wiring and installations for home remodels and renovations Outdoor lightingSecurity lightingDeck lightingGFCI Outlet InstallationOutdoor outletsEmergency generator installation and serviceWhole home surge protectionPool wiring and hot tub wiringLandscape lightingAdditional wiring for appliancesADA-Compliant home electrical updatesHome electrical safety inspectionsEnergy-saving electrical upgrades and evaluations 

Prince William County Commercial Electrical Services

Commercial tenant improvement projects and build outs Office electrical repairsOffice wiring upgradesCommercial electrical panel installation or replacement Industrial lighting installation and replacement Retail lighting installation and repairCommercial office lighting upgradesWall pack service and replacementEmergency lighting installation and repairExit sign lighting Ballast replacementMetal halide repair and replacementHigh-pressure sodium repair and replacementFluorescent bulb replacementOffice LED lighting upgrades and replacementsOffice light fixturesCommercial property electrical safety inspectionsCommercial energy saving evaluations Underground fault locatingTroubleshooting Electric meter conversionsCommercial emergency generator installation and serviceCherry pickersBucket trucksInfrared thermography inspections

Choose the Best Electrician in Prince William County for Your Project

As local Prince William County electricians, Root Electric is dedicated to ensuring that homeowners and businesses in the area receive the best electrical repairs and service available, with the safest team in the area. Contact your electrician in Prince William County today for residential electrical services or commercial electrical services. You can expect courteous and prompt service, the best electrical upgrades, installations and repairs and the safest electrical work in Prince William County. 

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Deck Lighting and Outlet Installation Services

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Deck Lighting and Electrical Outlet Installation Services

Installing deck lighting and outdoor outlets in your yard can extend your outdoor living opportunities well into the evening while also improving your home’s resale value. As the nights get warmer and with more families looking for ways to make close-to-home spaces seem more exotic, this is an excellent option that adds a lot of curb appeal too. There are many beautiful options for deck lighting that can improve safety and security as well. And extra outdoor outlet installation can give you more options for adding string lights, outdoor appliances and even a place to plug in your laptop for some outdoor home office scenery.

4 Deck Lighting Installation Ideas 

Depending on your deck design, outdoor living habits and goals, and how you’d like to improve those things, there are a number of different deck lighting options you can consider. And within these 4 deck lighting ideas, there are also many variations that you can consider: 

1. Step Lighting or Deck Stair Lights

One way to better illuminate your deck stairs is to install lighting right on them – on the vertical surface of each step, or under the lip of each step so that the light from the upper step shines clearly down on the lower step. This keeps the light focused downward to enhance safety going up and down the steps in the dark, and can also enhance your security lighting options as well. It also prevents light escaping upwards at night if you’re hoping for a good view of the stars.

2. Deck Post Lighting

There are many different styles and materials of deck post lighting. You can choose styles, colors and materials (from copper, aluminum or stainless steel and even plastic) that will look great and provide a decorative touch even during the daytime. Deck post lights should face down, again to illuminate the footpath or stairway at night. Deck post lighting is a very affordable option and can usually be installed quite easily. But if you’re a stickler for viewing the night sky, remember that these can produce more light pollution because they’re situated higher up than step lighting. 

3. Recessed Lighting on the Deck

Recessed lighting can be a great solution if you have a large overhang that needs illuminating on your deck. It provides great illumination to everything below and can be focused on certain areas that you particularly want to highlight or provide extra visibility for on your deck or backyard. Under-deck recessed lighting can only be installed if there is a covered porch above. 

4. Deck Rail Lighting

Deck rail lighting is also a great option that can be built flush into your deck rails in such a way as to make them invisible when you’re sitting. Again, they focus the light downwards toward the walkway or the stairs and also show people where the rail is.

Customer Testimonial


Very professional from the first contact by Bill Root through the free estimate and completion of the job. They kept the work area (my kitchen) very clean and made very few holes in the ceiling. My workmen included an apprentice. I think it is great that a company is assisting a young person to become a Master Electrician. I highly recommend Root Electric.

Chris R.

4 Reasons to Install Outdoor Outlets

In addition to installing extra deck lighting, if you really want to get more use out of your deck area, installing outdoor outlets that are protected from the elements is another smart move: 

1. More Deck Lighting Options

In addition to the deck lighting ideas listed previously, having a few extra outdoor outlets installed gives you more options for adding string lights or other electric-powered holiday decorations for the holidays. Just make sure you also have enough extra circuits to provide the power necessary to keep those lights brightly shining. 

2. Outdoor Cooking Appliances

As outdoor living and cooking become more popular, home chefs will need safe outlets and spaces that are protected from the weather to cook and use kitchen appliances outdoors. Whether that means you want to have an outdoor fridge or powered cooler, an electric grill or any other appliance, you’ll need to install outdoor outlets. 

3. Extending Your Home Office to the Outdoors

After several weeks of working from home in the kitchen or the living room, or maybe a dedicated indoor home office, you may be feeling the pull of the outdoors. If you’re tempted to tote your laptop outside to the deck, make sure you have a place to plug it in safely while you’re out there so you don’t lose power right in the middle of your next Zoom meeting. 

4. Safety Upgrades for Outdoor Outlets 

All outdoor outlets should be GFCI outlets that automatically shut power if they become wet. But newer models exist that provide extra protection from the weather and elements. Safety is always the most important consideration, so if you are not sure about your current outlets or want to install new outdoor outlets, contact us today for a virtual estimate and we can provide guidance. 

Install Deck Lighting and Outdoor Outlets

Remember that installing new deck lighting or outdoor outlets is a job best left to a licensed electrician for safety reasons, but also quality and insurance reasons. Get the job done right, and beautifully, the first time by contacting us today at Root Electric: (703) 494-3989.

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Our Coronavirus Policy

by Posted in Electrician Talk

Our Coronavirus Policy

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To our most valuable customers:

The Root Electric team has been following the developments of the COVID-19 virus very closely in recent days.  Since our founding in 1986, we have made it our business to be responsible members of our community, specifically in the ethical standards with which we hold ourselves and our business.  Three very important pillars of our standard of ethics are: ensuring the safety and welfare of our employees while at the work site; strict adherence to government policy; and putting our customers best interest before our own.  These standards have become even more salient, as we take into consideration our responsibility in limiting ourselves, our employees, and our customers to exposure to the COVID-19 pathogen.  

Electricians are listed as “critical infrastructure” for the energy sector in the guidelines released by the Department of Homeland Security.  (See https://www.cisa.gov/energy-sector).  These guidelines have been followed by all states currently operating under a “shelter at home” order.  As such, Root Electric will continue to operate under the threat of the pandemic with the following modifications to our normal procedure.  

We will keep in close contact with our employees, ensuring that they are in good health at the start of each day.  We will help keep them up to date on current guidelines of social distancing or quarantine set forth by the federal or state government.  If an employee is not feeling well, they will be allowed sick leave without question. Work for that day will either be assigned to another employee still in good health, or postponed until Root Electric can fit the project into the schedule.  

We will contact our customers first thing in the morning on our scheduled day of installation or service to verify that they are still healthy and comfortable with allowing electricians into their home.  Cancellation or delays of work will be allowed without penalty or forfeiture of deposit.  

Our electricians and estimators will clean their hands with disinfectant wipes before entering a jobsite and after leaving.  Out of respect for our customers’ property, we will not wipe off surfaces that we worked on unless otherwise instructed by the customer.  This is purely to protect our customers’ property from damage or staining from a cleaner not safe for the surface in question. We will be happy to use a customer-supplied disinfectant in the area where we work in a manner specified by the customer.  

It is important to note that the very nature of our work can irritate the lungs and nasal passages  in an otherwise healthy individual. Some areas of our homes, to include attics and crawl spaces, can induce coughing or sneezing due to the presence of cellulose or fiberglass insulation.  Additionally areas of the home not regularly occupied by the customer can accumulate dust or pet dander, causing a similar reaction. If you hear a cough or sneeze from one of our electricians while working, these common household air particulates are the likely culprit, not COVID-19.  

It is our intention to continue to serve our customers and our community in the safest way possible.  We intend to comply with all government instructions with regard to our industry as they are given. Due to the uncertain nature of the current environment, our policies may change suddenly and without notice, however, we will make every effort to keep immediate customers up to date.  Feel free to contact us directly if you have any questions or concerns.

Respectfully,
The Root Family
Root Electric

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How to Prevent Electrical Fires

by Posted in Electrician News

Check These 7 Things Right Now to Prevent Electrical Fires at Your Home

Perhaps the most tragic thing about the 25,000+ home electrical fires in homes across the U.S. each year is that the vast majority of them could have been prevented if the right safety precautions had been taken. In most cases, these are very simple tips you can do right now. Just taking care to use your electrical devices, outlets, etc. correctly can drastically reduce your family’s chances of electrical fire tragedy, so please read these tips and go through your house and make sure everyone is following them today. And if you have any questions, contact our Northern Virginia electrician now at (703) 494-3989.

1. Don’t Overload Your Outlets

In other words, you don’t want extension cords to be a permanent solution to any situation in your home. Each outlet’s circuits were designed to convey a certain amount of electricity and overloading with extension cords and too many power strips does exactly that. This is one of the most common reasons for electrical fires, and it’s entirely preventable. Make sure your surge protectors have an internal circuit breaker that will cut power if it senses problems. If your family simply has too many gadgets that need plugging in at once, it’s probably time to install new outlets and wiring.  

2. Use Only GFCI Outlets Near Water

Kitchens, bathrooms, workshops with sinks and any outdoor outlet should be a “Ground Fault Circuit Interrupter” outlet. You’ve seen them—the sturdy looking outlets with three-pronged plug stations that have two buttons in between marked “Test” and “Reset”. These outlets are especially designed to cut the power supply if they sense moisture. If your kitchen, bathroom or any other room where water flows has an older style outlet without those buttons, contact Root Electric right away to have them replaced.

3. Keep Flammable Objects Away from Electrical Outlets and Cords

Avoid placing furniture, curtains, decorations, boxes or any other flammable item in front of (or too close to) an outlet. Most outlets generate an unnoticeable of heat, but if they’re overloaded (see step 1) or faulty in some other way, they could generate a lot more heat, cause sparks and then start a fire on whatever is closest to them. Don’t take that chance! In fact, regularly feel your outlets to see if they’re noticeably warm (they shouldn’t be). If they are, electrical repairs are in order.

Customer Testimonial


Very professional from the first contact by Bill Root through the free estimate and completion of the job. They kept the work area (my kitchen) very clean and made very few holes in the ceiling. My workmen included an apprentice. I think it is great that a company is assisting a young person to become a Master Electrician. I highly recommend Root Electric.

Chris R.

4. Unplug Small Devices and Appliances When Not in Use

According to some studies, the average family has at least 50 electrical devices or appliances plugged in at any one time. Of course, very few people unplug their entertainment systems when they leave the house, nor does it make sense to ever unplug the refrigerator. However, we do urge you to unplug things like the toaster and other small kitchen appliances before you leave each day. And never leave a space heater plugged in when you’re not there! Those are notorious for electrical fires! Same goes for electric, heated blankets. Try to get into the unplugging habit now, because those kitchen appliances cause a lot of fires when left plugged in and unattended. Unplug small appliances you use in the bathroom too. Also, you can actually save money on electricity by fully unplugging computers, printers and entertainment systems from the wall when you’re not at home because even in the “off” position, those things till suck power from the system and add up on your electrical bill.

5. Retire Older Appliances

We know, you like to squeeze every last moment of use out of any appliance you have, because they can be expensive! But these older, malfunctioning appliances can be some of the worst electrical-fire starters! So, if any of your appliances show the following signs of wear, dispose of them safely and get a newer, safer model ASAP:

Frayed electrical cords

Using it causes lights to flicker in the room, or to turn them off (we’re looking at you, old microwaves…)

Sparks when turning on

Excessive heat coming from the device

These are signs of an electrical fire disaster just waiting to happen, so don’t ignore them!

6. Limit the Use of Space Heaters

One of the leading causes of electrical fires is prolonged use of electric space heaters. We recommend that people limit the use of space heaters by only using them when the room is occupied. We also recommend running them at 1/2 power instead of full power. A space heater at 1/2 power will keep a room just as warm as full power, but without the risk of damage to the outlets or overloading the circuit.

7. Schedule a Regular Electrical Safety Inspection

In addition to these 5 things that you can go around your house and do right now (make it a family activity so everyone knows these safety tips), schedule a regular electrical safety and electrical building code inspection with your Northern Virginia electricians. If you have any concerns or questions, we can help you decide how to solve problems listed above, and we can also check your electrical panel, wiring and other areas that would not be safe for you to check on your own. Electrical safety inspections provide great peace of mind for you and your family, and add a little extra incentive to buyers if you’re trying to sell your home as well.

The Root Electric Team is obsessive about safety for our clients! If you have any concerns about the electricity in your home, please contact us immediately and we can help you! (703) 494-3989.

REQUEST A FREE QUOTE

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How to Save Energy in Commercial Buildings

by Posted in Electrician News

Saving Energy in Commercial Buildings: 7 Ways

Whether you’re a property manager or a business owner, you are likely always looking for ways improve efficiency and trim waste to boost the bottom line. One of the most important ways you can do this is to find ways how to save energy at the office. Not only will this help you reduce excessive electricity bills for your commercial buildings, but it will help your company achieve a lighter environmental footprint—something everyone can feel good about. So, evaluate all of your commercial properties and offices to see if you’re following these 7 tips to save electricity.

Note: if you’ve done all of these things to save energy in the office, but your commercial building electric bills still seem high,contact Root Electric. Your Northern Virginia commercial electrical contractor can evaluate your commercial building to find and fix problems that may be draining your energy budget: (703) 494-3989.

1. Fix and Upgrade the Lights

Upgrading your commercial building or office lighting systems, particularly if it’s been a few years and the lights flicker, is a critical way to slash your energy usage. In fact, it’s one of the most effective ways how to save energy at the office Just think: how many people in your buildings remember to turn off all the lights when they leave a room? When was the last time you had your commercial electrical contractor check whether your office buildings were using the most efficient lighting systems available at that time? Upgrading your office lighting to the latest, most efficient office lighting systems can save a massive amount of electricity and money:

First, install motion-sensitive lighting in areas that aren’t in constant use, like conference rooms, restrooms, parking areas and breakrooms. This removes the problem of forgetful team members not turning off the lights. After a certain amount of time without detecting any motion in a certain area, the system automatically shuts the lights off, thereby saving you up to 80 percent in lighting costs.

Also, switch to the most efficient commercial building lighting options. Upgrading to LED lights can reduce the lighting portion of your electric bills significantly—to the tune of at least 60 percent! And newer models of fluorescent lighting and UID lights have also improved in their energy savings as well.

LED lighting also lasts considerably longer and requires less maintenance over the long haul, so it’s a wise choice for many applications in your office and commercial buildings.

2. Take Advantage of Power Management Settings on Office Equipment

Make sure that you set all office computers, printers and other equipment to the most efficient energy saving modes available. You shouldn’t walk past a vacant computer and see a screensaver anymore – the black, quiet screen of energy savings is what you should see.

3. Don’t take Power Management Automation for Granted, However

As wonderfully simple as it is to set power management defaults for your office equipment and other electrical systems, it’s important to double check them on a regular basis as these controls can get reset or overridden from time to time. Set a reminder to check power saving settings throughout your commercial buildings and offices each month, and especially during seasonal changes, to make sure everything is set to the most energy-efficient setting on a regular basis.

4. Update Your Server Rooms

Server rooms are an essential these days, but with cloud data hosting becoming more secure and ubiquitous, many companies are seeing a huge energy savings by migrating at least some of their data to a cloud hosting system. If you’re not ready to make that step, consult with your IT manager to find other energy saving options like bumping up the inlet temperatures for your servers or improving air-flow management.

Customer Testimonial


Hi Bill,  I wanted to take a few minutes to say Thank You to you and your team. You all handled a rather tricky situation in a professional and respectful manner. In addition, your team members did an outstanding job. They were respectful, knowledgeable, and courteous – taking time to explain every aspect of the job to us. As a result, the work was completed to our specifications and without any surprises. We are customers for life! All the best to you and yours.

Steve R.

5. Keep Motors and HVAC Systems Maintained and Updated

Every year, it’s important to have your motors synchronized and HVAC systems checked to ensure they are operating at their most efficient capacities. When these systems are working harder than they need to, they can pose a considerable drain on your energy resources and jack up your electrical bills.

6. Adopt Energy-Saving Thermostat Settings

We’ve all been there: the office thermostat wars! Someone is always either too hot or too cold. To save energy, it’s important to have energy-efficient, programmable thermostats installed in your commercial buildings and to have management make the call on the most energy efficient settings at different times of the year. Encouraging employees who run hot to bring a small fan for their cubicle while encouraging employees who run cold to bring an extra layer simply makes good energy sense. You can’t keep everyone happy with the thermostat. And while you’re at it, make sure you’re not heating or cooling any rooms that don’t need it.

7. Call Your Commercial Electrician for an Energy Audit: (703) 494-3989

Root Electric’s premier commercial electrical services team can go through your commercial buildings to discover even more energy-saving opportunities for your office than these. Every office is unique, so a customized look around can help you discover other ways to save energy at the office that you may have overlooked before. Contact us today to schedule an energy-saving office evaluation: (703) 494-3989

REQUEST A FREE QUOTE

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Electrical Upgrade During Your Remodel

by Posted in Electrician Services

​​If I Remodel My Home, Do I Need an Electrical Upgrade too?

Tis the season for remodeling here in Northern Virginia. People are updating their kitchens, their bathrooms, their home offices, etc. with remodeling plans they’ve been dreaming about for a few years now. But with these remodels, these questions always come up:

Do I need an electrical upgrade during my remodel?Should I get an electrical upgrade at the same time, before, or after the remodel?

Good questions, the answers to which largely depend on the home and the remodeling projects being done. But the majority of the time, the answers are:

Yes, you probably need an electrical upgrade, and…It’s usually more cost effective and safer to do the electrical upgrade at the same time as the remodeling project.

Of course, your home or circumstance may be different, but more often than not, you’ll want to take an electrical upgrade into account if you’re doing any major remodeling project in your home, particularly when it comes to kitchens, bathrooms, home offices, entertainment rooms or additions.

Why Do I Need an Electrical Upgrade with My Remodeling Project?

If you live in an older home, like many families here in Northern Virginia, it’s possible your home has actually needed an electrical upgrade for awhile now, depending on when you last had it done. Not only have our electrical demands increased over the years, but the building codes dictating how electrical work is done in homes have also changed to address those increases over the years. If your home isn’t currently up to code, adding new appliances, additional space, outlets, switches, etc. may well require an electrical upgrade in order to keep your home safe, efficient and up to local building codes.

Customer Testimonial


Excellent service all around. Bill Root III came out and provided an estimate, and answered all the questions I had. He was very patient and professional with me. The estimate was very detailed and an excellent price. Root Electric did an excellent job coordinating the schedule with me, their technicians, the county inspector, and the electric company so that everything would be completed the same day.

When the work was performed, the 2 technicians arrived and got right to work. They were very thorough, professional and got all the work completed with no issues (no issues from the inspection either). I would definitely recommend this company and will use them again.

Kent S.

Bathrooms, Kitchens, Workshops, Home Offices and Entertainment Rooms Need More Power

Kitchens and bathrooms are two of the most popular types of remodeling projects, but many families are adding rooms, updating their home offices, adding workshops, etc. All of these new additions or remodels require upgraded, more efficient electrical wiring, and possibly a new electrical panel.

Let’s just discuss the kitchen for a moment, as an example. In older homes, kitchens often didn’t have that many outlets because there weren’t as many small appliances and gadgets in use. Fridges and ovens were smaller and didn’t pull as much juice as today’s larger models either. Today’s building codes require an outlet ever 6 feet away—but we find that for many of our customers, they need outlets spaced around 4 feet from each other.

Remodeling at the Same time as an Electrical Upgrade

It makes far more sense to upgrade your electrical system during a home remodeling project than to delay it until afterwards. Here’s why:

It saves time and dust to update the wiring while everything is out in the open during the remodel.

It costs far more to have to re-open walls and panels you’ve just finished in order to do the electrical work later.

Overall, it will save you a lot of time, money and hassle to just do it all at the same time. That way, the electrical system can be updated to accommodate your new remodel as well as your current and future electrical needs as they grow. It’s also safer to do all of the electrical work this way so that your electrical system fits well with any new appliances, tools, office systems, etc. that you intend to install during your remodel.

Need a Woodbridge, VA Residential Electrician? Call (703) 494-3989

If you’re getting ready for a remodeling project, large or small, don’t forget to contact Root Electric, the residential electricians homeowners trust to keep their homes safe and powered up in the most efficient way possible: (703) 494-3989. We’ll show you how you can save time and money on your remodeling project while keeping your home current on all your family’s electrical needs.

REQUEST A FREE QUOTE

Satisfaction / Safety First Since 1986

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More Articles About Home Electrical Improvement

Electrical Video FAQ – When to replace house electrical panel?Read More Electrical Home Safety InspectionsRead More Benefits of Using Recessed LightingRead More