- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
I meant after - The NEMA recommended tests include another short-circuit. This is the second fault after the initial one.
NEMA doesn't want you to know that MCCBs are basically disposable – or at best you have absolutely NO idea what the next event will do. A retested MCCB after an initial fault is definitely not “like new.” That is why the NEMA statement is they “…should be able to safely clear two short circuits at its maximum rating.” NEMA has no idea either.
NEMA doesn't want you to know that MCCBs are basically disposable – or at best you have absolutely NO idea what the next event will do. A retested MCCB after an initial fault is definitely not “like new.” That is why the NEMA statement is they “…should be able to safely clear two short circuits at its maximum rating.” NEMA has no idea either.