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[j1mbodrea]

Need help with questions 54/55 please people.... im sure 55 is good, but need confirmation....

 

[j1mbodrea]

Need help with questions 54/55 please people.... im sure 55 is good, but need confirmation....

 

[Charlie_]

What’s the question?

 

[j1mbodrea]

It won't let me upload the pic....

 

[Charlie_]

Ahh right, ok.
Hopefully you will get it up soon

 

[j1mbodrea]

 

[Taylortwocities]

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?

 

[j1mbodrea]

My tutor said it was A....

 

[Taylortwocities]

My tutor said it was A....

For which question?

 

[Deleted member 26818]

A is correct for question 55.

 

[Bobster]

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.

 

[Taylortwocities]

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

 

[Bobster]

Is there an echo on this forum?
See my post #7

Posted my reply before scrolling through the whole thread.

 

[Deleted member 26818]

Now that we’ve worked out what Icn and Ics is.
Who cam explain Icu?

 

[The Ghost]

Is there an echo on this forum?