HoosierSparky
Senior Plans Examiner, MEP
- Location
- Scottsdale AZ
- Occupation
- Senior Plans Examiner
I am having discussions with applicants on what this section requires. Per NEC 2020 705.12(A), "Each source interconnection of one or more power sources installed in one system shall be made at a dedicated circuit breaker or fusible disconnecting means." The way I read this is you can have several power sources (inverters, ESS, generators, etc.), but they must 1st be combined prior to making a single connection at the main panel. This provides a single disconnect of all supplemental power sources backfeeding at the main panel.
The key wording is SHALL BE MADE AT A DEDICATED CIRCUIT BREAKER OR FUSIBLE DISCONNECTING MEANS. Specifically the connection SHALL be made at A. A being singular. In addition it remains singular when stating CIRCUIT BREAKER. BREAKER is singular also. It doesn't say breakers.
What I think the CMP was and is looking for is a single disconnecting means AT the MSP for all supplemental power, not multiple PV breakers at the MSP. Am I wrong and if so how?
The key wording is SHALL BE MADE AT A DEDICATED CIRCUIT BREAKER OR FUSIBLE DISCONNECTING MEANS. Specifically the connection SHALL be made at A. A being singular. In addition it remains singular when stating CIRCUIT BREAKER. BREAKER is singular also. It doesn't say breakers.
What I think the CMP was and is looking for is a single disconnecting means AT the MSP for all supplemental power, not multiple PV breakers at the MSP. Am I wrong and if so how?