ECN Forum Forums General Topics of the Trade General Discussion Area 3wire 3 phase grounded service

240.85 Applications.
...A two-pole circuit breaker shall not be used for protecting a 3-phase, corner-grounded delta circuit unless the circuit breaker is marked 1–3 <phase> to indicate such suitability.

[This message has been edited by gfretwell (edited 01-13-2006).]