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Common US and Canada Voltage Systems 600Vac and below

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Common US and Canada Nominal Voltage Systems 600Vac and below

Resolution:
While there are many different voltage systems, the below picture shows some common US and Canada nominal voltage systems 600Vac and below.



Note:
  • In the voltage system designation (eg. 480Y/277) the higher number is always the phase to phase voltage and the smaller number is the phase to ground voltage.
  • If the higher number is first, it is a 3-phase system.  If the lower number is first (eg. 120/240), it is a single phase system.
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