Table

Nominal Voltages for Calculators

Nominal Voltages for Calculators reference with assumptions and boundary notes.

Reference boundary

Nominal voltage reference only. Confirm the actual service, utility, and equipment voltage before project use.

Reference table

Reference common nominal voltages used as calculator inputs in Canadian electrical work.

Reference basis uses common Canadian nominal voltage labels; actual supply values vary by utility and project.
Nominal voltagePhase contextCommon useCalculator use
120 VLine to neutralResidential and small loadsSingle-phase or DC reference when applicable
120/240 VSingle-phase split systemDwellings and small servicesUse 120 V or 240 V according to the load
208Y/120 VThree-phase wyeCommercial distributionUse 208 V line-line or 120 V line-neutral
347/600 VThree-phase wyeCanadian commercial and industrial systemsUse 600 V line-line or 347 V line-neutral
600 VThree-phase line-lineMotors, transformers, and distributionCommon three-phase calculator preset
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.