USA Common Power Sources



Power Sources


Power supplies common in the US

Here are some common power supplies for residential and commercial buildings.

In the feild as an installer the term 277/480 is referred to as high voltage and 120/240/208 as low voltage. Generally speaking that is.

48 volts and below are also referred to as low voltage.

With that in mind when your on a project that has a combination of ALL these voltages make sure you clarify you meaning when talking with others.

Excluding the 48 volts and below lets take a look at several types available from the utility company:

Note not all voltages mentioned will be available in different parts of your city there fore a transformer may be required to obtain low voltage power supply.


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