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For single circuit cable selection purposes the correction factors must be applied to the
Peter
#1 Print Post
Posted on 25-09-2010 19:49
Super Administrator

Posts: 139
Joined: 24.01.09

a prospective short circuit current
b current carrying capacity of the cable
c current rating of the protective device
d the earth fault current of the circuit.

Correct answer :
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Edited by Peter on 26-09-2010 10:24
 
Geoffsd
#2 Print Post
Posted on 01-02-2011 00:07
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Posts: 2
Joined: 01.12.10

Dear Sir,

Surely the correct answer to this question should be 'b'

Kind regards,
Geoff
 
Peter
#3 Print Post
Posted on 01-02-2011 21:55
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Posts: 139
Joined: 24.01.09

Hi Geoff
I think we can find the correct answer in Appendix 4, 5.1.1
where we have
www.aboutelectricity.co.uk/images/articles/equation3.gif

In - the rated current or current setting of the protective device.

regards
 
Geoffsd
#4 Print Post
Posted on 10-02-2011 00:26
Member

Posts: 2
Joined: 01.12.10

Hello Peter,

Yes, fair enough.

I suppose I was thinking that as the product of the equation is It and that is what changes that would be the answer.

Kind regards,
Geoff.
 
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