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Discuss Different Cable Size in the Commercial Electrical Advice area at ElectriciansForums.net

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truth

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Hi
Can we use existing 2core x 70mm2 and 2 core 50mm2 (850m length) cables to carry a 3 phase supply (3 phase and neutral).

Load : 5KW
Purpose : to feed the UPS unit

Concerns would be from the voltage drop and the terminal voltage difference at the end point. I have worked out the voltage. They are within the limit.
The reusage of the existing cables will save enormous money (cables, trenches).
No Nearest secure power supply is available. Either to run a new cable or reuse the existing cables.

Could You advise Your opinion please.
Thanks
 
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