US Industrial Electricity Voltage
3. Motor rated voltage: 115V, 230V, 460V and so on. Lighting rated voltage: 120V, 240V and so on.
US industrial electricity for the three-phase four-wire 227V / 480V; civilian is a single-phase 3-wire system 120V 60HZ (working zero line and the protection of the zero line is separate).
In China, long-term single-phase second-line and three-phase four-line to the residents of power supply, industrial, civilian mixed in a system, a great interference.
The United States, Japan, the United States some countries are single-phase three-line to the residents of power supply, and industrial systems are separated.
2. Requirements for "Scope A":
115 ~ 120V System:
When lighting: 110 ~ 125V of electrical equipment; power supply point 114 ~ 126V.
No lighting: electrical equipment at 108 ~ 125V; power supply point 114 ~ 126V.
460 ~ 480V system: (including 480 / 277V three-phase four-wire system)
When lighting: power equipment at 440 ~ 500V; power supply points 456 ~ 504V.
No lighting: electricity equipment at 432 ~ 500V; power supply points 456 ~ 504V.
13200V system: power supply point 12870 ~ 13860V.
US industrial electricity as follows:
US Voltage Standard (ANSI C84-la-1980):
1. The power supply system design should be carried out according to "range A". The voltage deviation range of "range B" should be rare, and it should take measures to achieve the requirement of "range A".
