120 208 Volt Electrical Service Wiring Diagram
The most common commercial building electric service in North America is 120208 volt wye which is used to power 120 volt plug loads lighting and smaller HVAC systems.
120 208 volt electrical service wiring diagram. Quickly connectdisconnect motors welders generators and more. The Companys nominal secondary service voltages are 120 volts single phase 120240 volts 3 wire single phase 240 volts 3 phase 3 wire 120240 3 phase 4 wire 120208 3 phase 4 wire 277480 volts 3 phase 4 wire. Is the least efficient diagram among the electrical wiring diagram.
In larger facilities the voltage is 277480 volt and used to power single phase 277 volt lighting and larger HVAC loads. In western Canada 347600V is common. It reveals the parts of the circuit as streamlined shapes as well as the power and also signal links between the devices.
Service voltages higher than 480 volts are available only by negotiation with the company. This wiring diagram illustrates installing a 15 amp circuit breaker for a 120 volt branch circuit. A 10 kVA transformer volt secondary is to service an 8 kVA.
This type of service is usually supplied using 240 V line-to-line and 120 V line-to-neutral. Four Wire Delta Service AN-113 PDF 1 page 120208240 Volt Service. A volt primary transformer with a volt secondary is operated at volts regardless of whether the source is three phase 3-wire or three phase 4-wire.
Only a member of this blog may post a comment. 208V 3 Phase power has 3 electrical legs phases evenly spaced in a circle 360 degrees 3 phases 120 degrees around a center neutral. A wiring diagram is a simplified conventional photographic depiction of an electrical circuit.
In some ways the high leg delta service provides the best of both worlds. A 15 amp circuit is usually used for wall receptacle outlets and room light fixtures. Each leg phase provides power phase voltage at a unique angle phase angle to the center neutral.
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