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how can we know cable size for a given current?
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Answer Posted / m.faisal siddiqui.
The selection of a cable size for a given value of current
can be done using the cables & tables provided by the cable
manufacturer. The selection of cable size also depends upon
the lenght of cable from source to load. The total voltage
drop should not exceed 2.5% of rated voltage. Following
factors shall be considered while selecting a cable for
required load.
1. Rated Current.
2. Capacity of Protective Circuit Breaker used.
3. Total Length of cable.
4. Total voltage drop.
5. Laying Method.i.e. underground,in conduit,in trays etc.
6 No. of cables.i.e. grouping factor.
7. Ambient Temperature of installed area.
Temperature Correction Factor to be applied.
8. Type of cable. i.e. singel core,multicore,PVC insulated,
Armoured, XLPE insulated etc.
| Is This Answer Correct ? | 25 Yes | 2 No |
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