Table

3-Phase Service Voltage Table

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

Scope

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

Lookup table

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

Scroll sideways to keep row labels aligned with hidden columns.

Lookup 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 lookupSelected industrial systems
Notes
  • Check table values for preliminary lookup and arithmetic checks only.
  • Confirm equipment ratings, product markings, installation conditions, utility requirements, and the local authority requirements before design or field use.