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balwant
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Join Date: Jan 2008
Posts: 1

currrent rating of cable.

01/17/2008 4:01 AM

what is actuall relation between SQ MM of power cable on its current rating ?
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PWSlack
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#1

Re: currrent rating of cable.

01/17/2008 4:06 AM

The latest edition of the Institution of Electrical Engineers' "Wiring Regulations" can provide a comprehensive insight into this question.

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TVP45
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#2

Re: currrent rating of cable.

01/17/2008 7:49 AM

This question comes up a lot.

There is not an equation that tells you a relation. The answer depends on the type of insulation, frequency of the power, whether it is in conduit or not, number of cables together, etc. You MUST use a table such as the one named by PW or the NEC or whatever. Wherever you live, there is an electrical code that tells you the answer. Ask an electrician.

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