A quick reference, this is far from authoritative or exhaustive but intended to be used a go-to unless you have better information:
| L1 (Hot 1) |
(Hot 2) | L2 | L3 | N | PE | ||
| Europe | Single Phase | Brown | – | – | – | Blue | Green / Yellow |
| Three Phase | Brown | – | Black | Grey | Blue (if present) |
Green / Yellow | |
| USA | Single Phase 120 V | Black | – | – | – | White | Green or Bare |
| Split Phase 120/240 V | Black | Red | – | – | White | Green or Bare | |
| Three Phase 120/208 V | Black | – | Red | Blue | White (if present) |
Green or Bare | |