Cable length calculation

View the thread, titled "Cable length calculation" which is posted in Australia on Electricians Forums.

B

Brucky

Hi people,
I'm carrying out an online course to gain my qld electrical licence.
Been a good while since calculating cable length using equations and regs books.
Can anyone guide me to the correct equations please
Thanks in advance
 
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what exactly do you want to calculate? if it's max. length of a circuit, use the mOhms/m to determine the resistance (R1+R2) for the length you envisage, or conversely, to determine the max. cable length to give an acceptable Zs. then the mV/A/m to ensure that volt drop is within limits.
 
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