Unit C - Hutchison Enterprises

The receptacles for 240 V appliances and 120 V appliances are different. A 240 V plug may have 4 prongs, one for each of the wires: red, black, white, and bare (or green)(Figure 3). Most 120 V plug require 3 prongs, one for black, white, and ground. There are also many devices, like lamps, that use 2 prong plugs and do not have a ground pin. ................
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