Bus bar short circuit duration
Bus bar short circuit duration
(OP)
If the Incoming breaker can clear the fault within 3 cycles (50 ms), can the bus bar be rated for 3 cycles? Is there any standard (NEC/ANSI) that requires the bus bar to be rated at 1s or 3s.






RE: Bus bar short circuit duration
RE: Bus bar short circuit duration
RE: Bus bar short circuit duration
RE: Bus bar short circuit duration
NEC doesn't have any requirements for this. It only requires that all equipment be operated "within its rating".
RE: Bus bar short circuit duration
Regards
Marmite
http://copperalliance.org.uk/resource-library/elec...