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Page Title:
Alternating Current Voltages. |
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 TM 55-1905-223-24-17
a. Alternating Current Voltages.
(1) Three-Wire, Single Phase, 60 Hz.
(a) FIGURE 2-1 shows power supply wires entering main electrical panel and then going to branch
distribution panel or circuits.
(b) If wires are identified in a 230/1/60 supply by A, B, and G, as in FIGURE 2-1, the voltmeter
readings should be:
1
A to G-115 volts.
2
A to B-230 volts.
3
B to G-115 volts.
(c) Voltage readings may be slightly higher or lower but must be within 10 percent of these
voltages.
Figure 2-1. Voltage System, 115 and 230V/1 Ph/60 Hz.
2-33
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