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what is the procedure for cable sizing or on what basis we
will calculate the size of cable?????
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Answer Posted / suresh kumar
The procedure for cable sizing is first to measure the
load in currents and voltage of load which is to be
connected in that particular cable. Then the length of
cable. Type of cable conductor whether copper or aluminium.
Medium of cable passing whether in opened cable tray (air),
closed cable tray, in open land, in cable trunch etc. The
usage of cable also to be taken care, ie like telephone
cable, control cable, power cable etc.
In an example the current rating of 10 sq. mm copper cable
in air is 40Amps. If the length of cable is shorter we can
use it and if the length of the cable more, we have to
calculate the voltage drop of that cable and may be have to
use 16 or 25 sq. mm cable instead of 10 sq mm.
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