What is your calculated load?I want to install a main disconnect for a group of 7 meters in a building. (6 apartments and 1 common) How do I size the disconnect? Fusible or breaker? Interrupt Rating? Any suggestions?
I want to install a main disconnect for a group of 7 meters in a building. (6 apartments and 1 common) How do I size the disconnect? Fusible or breaker? Interrupt Rating? Any suggestions?
If this is a service with utility-owned meters, then in addition to the code references mentioned by others I recommend coordinating with the metering department of your local utility. They may take issue with a disconnect ahead of their meters, esp in front of the house meter.
Just basing that on my many experiences with one utility (Xcel). Not sure how other PoCos handle services to apartments.
Standard breakers are thermal magnetic and provide short circuit, ground fault and overload protection....
Fused or breaker depends on your preference. Fuses operate over a time by heating up due to the overcurrent. Breakers are an instantaneous device primarily to handle fault conditions. ...
I *believe that if you purchase a service entrance rated disconnect, that will take care of your interrupt rating.