EDC Fast Facts 9 – Electrical Cable Calculations.

Electrical cable calculations are essential to ensure the overall electrical system operates safely.

A correctly calculated low voltage system will ensure no overheating of cables, correct sizing of protective devices and correct activation of protective devices in the event of a fault.

Main calculations required on the low voltage system are; the current carrying capacity of the cable, the short circuit current withstand of the cable and the voltage drop over the cables length.


Alan Tyrrell

Project Manager London Office

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