I'd like to go over what I understand to be the requirements for wiring a 240v. cnr. grounded delta service.
The service may be installed using a 3 pole cicuit breaker, never fuses, grounding and bonding the incoming grounded phase just as you would a neutral in a 120/240, 3w service. The three pole circuit breakers are not slash rated so dual rating won't be a problem.
I have been told that it is okay to install this service in a single phase panel with a 2 pole main and just land the grounded phase on the panel supplied neutral bar. While landing the grounded phase conductor is not a problem, it seems as though the main rating (slash) will be.
If a 3 pole main breaker panel is installed, can a 3 phase circuit be run from this panel, using a rated 2 pole breaker(?) and then taking the grounded phase off of the grounded bar?
I have also had someone tell me that I need to use a "grounded B phase" breaker. I can't find where that is required. Thanks in advance
The service may be installed using a 3 pole cicuit breaker, never fuses, grounding and bonding the incoming grounded phase just as you would a neutral in a 120/240, 3w service. The three pole circuit breakers are not slash rated so dual rating won't be a problem.
I have been told that it is okay to install this service in a single phase panel with a 2 pole main and just land the grounded phase on the panel supplied neutral bar. While landing the grounded phase conductor is not a problem, it seems as though the main rating (slash) will be.
If a 3 pole main breaker panel is installed, can a 3 phase circuit be run from this panel, using a rated 2 pole breaker(?) and then taking the grounded phase off of the grounded bar?
I have also had someone tell me that I need to use a "grounded B phase" breaker. I can't find where that is required. Thanks in advance