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what is derating?, why it is neccesary, it is same for all
means for drives, motors,and cables.



what is derating?, why it is neccesary, it is same for all means for drives, motors,and cables...

Answer / mrinal

The current currying of cables will change depending upon
the site temperature (location of site), type of run(it
will run through DUCT, TRENCH, BURRIED ect.), number of
tray, depth of trench, distance between cables. Considering
this condition actual current currying capacity of cable
reduce than current currying capacity (which given to cable
cataloge) this is called deraing.

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