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Temperature
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- Selection of wire for any electrical device is normally based on the type of installation, ambient operating temperature, service conditions, type of load served, and other criteria as applicable.
- For example, in a region where the temperature of surrounding is very high in that region, the sag in the wire is more due to high temperature so for selecting wire in that area we should use ACSR conductor so that sag effect is minimised.
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Conductors size
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- While selecting the wire for any device conductor size plays a very important role, as the wire size depends on the current rating of different devices.
- For example, for a subcircuit, the size of an aluminium wire required is 1.5 mm2, but in the same circuit for copper wire the conductor size required is 1mm2.
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Colour Code
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- The colour code is provided in the wire for our simplicity to identify whether it is a phase wire or neutral other than that it does not affect the wire installation to any electrical device.
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Whether above or below the ground
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- Wiring insulation is different for overhead and underground system because for underground wiring the maintenance is not as feasible as in overhead wiring.
- So, it is necessary to select the proper wire depending upon whether it meant to operate above or below the ground.
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