Article V. Electrical Service and Distribution
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11.120.230 Service voltage.
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The service voltage shall be 480/277 volts, three-phase, four-wire or 208/120 volts, three-phase, four-wire.
Equipment voltage characteristics shall be as follows:
|
Equipment |
Rating |
Voltage |
Phase |
|---|---|---|---|
|
Motors |
1/2 hp and below |
120 V |
1 ph |
|
Motors |
above 1/2 hp |
480 V (208 V |
3 ph 3 ph)* |
|
Unit Heaters |
2 kW and below |
208 V (120 V |
3 ph 1 ph) |
|
Unit Heaters |
3 kW and above |
480 V |
3 ph |
|
Lighting |
120 V |
1 ph |
*where 480 V is not available.
(Design Guideline DG-08 § 13.1, dated August 2006)