Evil c50 board, kA rating

Strangeman24 · Mar 1, 2011

Can any one help? Iv been sent to do some test and inspections and have come across our arch enemy the c50 board!!! It's due to be replaced but it's got to be condemned first. Dose any one know the kA rating of the c50 breakers bs no: 3871, I ask because the customer is requesting all breakers 20A and above are 10kA rated.

mogga · Mar 1, 2011

a wee search on the forum popped up this

Re: Crabtree C50 design issues

I've had a lot of experience with C50's and have never come across any issues.
One thing to watch is the low breaking capacity....3ka(white lettering)....4.5ka(yellow lettering).

Thanks Wirepuller for that Info good to know about the white,Yellow

IQ Electrical · Mar 1, 2011

Strangeman24 said:
Can any one help? Iv been sent to do some test and inspections and have come across our arch enemy the c50 board!!! It's due to be replaced but it's got to be condemned first. Dose any one know the kA rating of the c50 breakers bs no: 3871, I ask because the customer is requesting all breakers 20A and above are 10kA rated.

The last ones we came across were M3.5's (3.5 kA)