Table

3-Phase Service Voltage Table

3-Phase Service Voltage Table reference with assumptions and boundary notes.

Reference boundary

Nominal service-voltage reference only. The serving utility and equipment markings determine the actual project voltage.

Reference table

Reference common Canadian three-phase voltage labels and line-to-line or line-to-neutral relationships.

Reference basis uses nominal system labels and three-phase voltage relationships.
System labelLine-line voltageLine-neutral voltageCommon use
208Y/120 V208 V120 VCommercial panels and mixed loads
480Y/277 V480 V277 VSome equipment and facility systems
600Y/347 V600 V347 VCommon Canadian commercial and industrial distribution
600 V delta600 VNot generally used as a load referenceSelected industrial systems
Use notes
  • Use this table for preliminary reference and arithmetic checks only.
  • Confirm equipment ratings, product markings, installation conditions, utility requirements, and the local authority requirements before design or field use.