Secondary Distribution

Secondary distribution systems provide electrical energy at the utilization voltage levels from distribution transformers to customer meters. Typical secondary voltages in the United States include 120/240 V for residential use, 208Y/120 V for residential and commercial use, and 480Y/277 V for industrial and high-rise commercial use.

In r...

Secondary distribution delivers electricity at customer utilization voltages from distribution transformers to customer premises, with voltage levels varying for residential, commercial, or industrial applications.

There are four general types of secondary systems.

Individual distribution transformers serve single customers, especi...