pcanning87
Member
- Location
- New York
Hey Guys,
First time designing a commercial rooftop with 2014 Code, I have rapid shutdown covered through string inverters on the roof and contactor disconnects for DC circuits > 10 feet from the array.
I'm planning on meeting 690.47(D) by running a new DC GEC from building steel to a ground lug on each separate, UL2703 listed, racking array. My thought is to meet 690.47(C) by connecting this DC GEC to each inverter, and therefore avoid using 690.47(C)(3). So each inverter would have a separate EGC and GEC grounding connection.
Assuming the building steel is part of the existing premises grounding electrode system, my GEC is sized per 250.166 and the GEC is installed in accordance with all of 250, am I missing anything? Is there any room for simplification?
Thanks in advance.
First time designing a commercial rooftop with 2014 Code, I have rapid shutdown covered through string inverters on the roof and contactor disconnects for DC circuits > 10 feet from the array.
I'm planning on meeting 690.47(D) by running a new DC GEC from building steel to a ground lug on each separate, UL2703 listed, racking array. My thought is to meet 690.47(C) by connecting this DC GEC to each inverter, and therefore avoid using 690.47(C)(3). So each inverter would have a separate EGC and GEC grounding connection.
Assuming the building steel is part of the existing premises grounding electrode system, my GEC is sized per 250.166 and the GEC is installed in accordance with all of 250, am I missing anything? Is there any room for simplification?
Thanks in advance.