what is derating factor in Cable ? how we minimise this?
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Answer Posted / shvetang dave
Die electric factor depends on the temperature around the
cable, method of cable laying etc..if cable is to be design
for 35 deg c and if temperature increases above 35 deg c
then resistance of cable increases (positive temp.
coefficient), so its current carrying capacity will
decreses...So current paseed through cable will decreases,
it menas its capacity will down..it's called derating
current and notrated current...and same effect is done for
cable laying method...By using good insulation and proper
method of cable laying reduces its effect...
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