Table
Nominal Voltages for Calculators
Nominal Voltages for Calculators lookup table with assumptions and boundary notes.
Scope
Nominal voltage planning only. Confirm the actual service, utility, and equipment voltage before project application.
Lookup table
Lookup common nominal voltages used as calculator inputs in Canadian electrical work.
Scroll sideways to keep row labels aligned with hidden columns.
| Nominal voltage | Phase context | Common use | Calculator use |
|---|---|---|---|
| 120 V | Line to neutral | Residential and small loads | Single-phase or DC lookup when applicable |
| 120/240 V | Single-phase split system | Dwellings and small services | Use 120 V or 240 V according to the load |
| 208Y/120 V | Three-phase wye | Commercial distribution | Use 208 V line-line or 120 V line-neutral |
| 347/600 V | Three-phase wye | Canadian commercial and industrial systems | Use 600 V line-line or 347 V line-neutral |
| 600 V | Three-phase line-line | Motors, transformers, and distribution | Common three-phase calculator preset |
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.