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Need help with questions 54/55 please people.... im sure 55 is good, but need confirmation....
 
[ElectriciansForums.net] 2391-52
 
54
I agree C2. If the EFLI is too high then the MCB won't trip within the required time.

55

Icn is the rated ultimate short-circuit capacity.

Ics is the rated service short-circuit breaking capacity. This is the maximum level of fault current operation after which further service is assumed without loss of performance.

What do you think?
 
Icn is the rated ultimate short-circuit capacity. Ics is the rated service short-circuit breaking capacity. This is the maximum level of fault current operation after which further service is assumed without loss of performance.
 
Icn is the rated ultimate short-circuit capacity. Ics is the rated service short-circuit breaking capacity. This is the maximum level of fault current operation after which further service is assumed without loss of performance.
Is there an echo on this forum?
See my post #7
 

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