Using A 3 Pole L8 Or L9 Device On A 1 or 2 Pole Load
Can you use a 3 pole L9 breaker on a 1 or 2 pole load?
Can you use a 3 pole L8 breaker on a 1 or 2 pole load?
Can I use just 2 of 3 poles from L9-10/3/C (2 phases from 3 phase lines) 1st and second pole?
Troubleshooting Nuisance Tripping Of Molded Case Circuit Breakers
The increased use of high efficieny motors requires a closer look at specifications when applied to circuit protection methods. Not considering all of the factors can lead to specification errors and nuisance tripping or worse.
Unlike the fuse box in most residential power centers, industrial circuit protection can rarely be reused after a short-circuit. Some products are specifically tested by UL to withstand a short circuit.