ggunn
PE (Electrical), NABCEP certified
- Location
- Austin, TX, USA
- Occupation
- Electrical Engineer - Photovoltaic Systems
So basically their rule is 'do it like the drawing because we are not smart enough to read the code and determine with our own minds if it meets code.' I'm glad I'm not dealing with that. :slaphead:
So what do you do when you have a meter main combo with slots for multiple service disconnecting breakers? Or do those not exist in your area?
It's not that bad. I have had some success arguing points of code when my designs did not conform exactly with their drawings, just not on the point of a bladed disco vs. a breaker for a PV system disconnecting means. I have not yet encountered a meter main combo around here, but I have encountered MLO panels fed directly from a meter with no OCPD. San Antonio says we cannot land a PV breaker in a MLO MDP, period. We either have to install a main breaker in the MDP or make a line side connection in a separate tap box.
Austin won't allow it either, but they will allow a bladed fused disco to feed a MLO MDP busbar, and if there are 6 breakers there already, they do not count the PV disco as a seventh handle. I have not tried to fly that design in San Antonio, but since they consider the PV interconnection in a line side connection to be a service disconnect (Austin doesn't), I'd bet they won't allow it.