Awesome explanation. I do QC for a large electrical contractor in the DC area at different data centers were building and this really helped me start to understand what’s involved in the coordination of all the ocpd’s. You mentioned that coordination is a code requirement but also said that some customers don’t care about upstream devices opening from a downstream fault. Are there situations where coordination is not an NEC requirement?
Selective coordination with tested pairs in fuse applications: one issue with this is that many disconnects accept different fuse manufacturers. There's no requirement in the NEC to put a label on a disconnect using this method, to inform a future service person to replace only with a certain manufacturer's fuse.
Just joined 👍🏾
Quite useful
Awesome explanation. I do QC for a large electrical contractor in the DC area at different data centers were building and this really helped me start to understand what’s involved in the coordination of all the ocpd’s. You mentioned that coordination is a code requirement but also said that some customers don’t care about upstream devices opening from a downstream fault. Are there situations where coordination is not an NEC requirement?
Great content. At the same time you are not only teaching useful items but also giving real product support
I appreciate that!
Selective coordination with tested pairs in fuse applications: one issue with this is that many disconnects accept different fuse manufacturers. There's no requirement in the NEC to put a label on a disconnect using this method, to inform a future service person to replace only with a certain manufacturer's fuse.