Get Hired Now Read More

Skip navigation

Serving the Buffalo Area since 1995

Scherer Electric Blog

Why You Need Pros for Commercial Transformer Installation


Transformers are important parts of most commercial electrical systems and a part that’s unfamiliar to many people because they’re rarely part of home electrical systems. The job of a transformer is to raise and lower voltage levels for a facility as necessary, and without a change in the electrical frequency (which is the job of an alternator) and only work with AC (alternating current). Essentially, transformers are electrical regulators and are have a variety of uses. 

If your business relies on one or more transformers, you can expect these devices to last for many years—provided they were accurately installed. Transformers do not contain any moving parts, which accounts for their longevity. However, we have to emphasize how important it is that you only allow licensed commercial/industrial electricians to handle installing a transformer when you need one. We’ll explain why below.

Selecting a commercial transformer

Proper installation starts with choosing the correct type of transformer to install. There are many design types of transformers with a range of applications:

  • Ventilated dry-type transformers. The most common type of transformer used for indoor electrical systems.
  • Sealed dry-type transformers. Similar to the ventilated version, but can also be used outdoors and are effective in indoor environments with many air particulates.
  • Cast-coil transformers. These are often used in areas with high levels of moisture.
  • Nonventilated dry-type transformers. These are completely enclosed versions of the ventilated type and work in environments where a standard type is not possible.
  • Oil-filled transformers. These have their winding inside tanks with insulating mineral oil. They work effectively at high temperatures.

Electricians will analyze the facility and conditions as well as its electrical requirements to find the transformer design type that will work best.

Sizing a commercial transformer

The electrical size of a transformer must be exact for a facility, otherwise the transformer will have a shortened life expectancy and be unable to handle the required loads. Professionals must not only size the transformer (using a transformer load rate in kVA), they also have to account for possible future growth in the electrical load. 

Meeting code regulations

Any installation of a transformer must meet with the requirements of the National Electrical Code and its local jurisdiction. These requirements vary according to the type and use of the transformer, and only professionals will know the code specifics. You don’t want someone to make an error regarding regulations, as they can result in costly violations. 


Electrical systems of all types pose safety hazards to anyone working on them, including for homes. The potential dangers from working with the electrical loads present in commercial and industrial facilities are enormous. You do not want a non-professional or an electrician unfamiliar with commercial/industrial work to handle a transformer. The danger of injury during installation is too high (and with a non-professional there’s no liability insurance) and a poorly installed transformer can create later electrical dangers.

If you need commercial or industrial electric service in Buffalo, NY, Scherer Electric is the trustworthy contractor to call. We’ll see any transformer service you need is done correctly.

Scherer Electric Is Western New York’s Favorite Electrician! Rely on us for your commercial electrical needs.

Comments are closed.