Voltage drop

Does free air differ from direct burial when calculating the voltage drop of a long run?
i have 450' over head in free air what size al wire can I use to get between 3-4% voltage drop?
thank you
 

GoldDigger

Moderator
Staff member
The voltage drop will not be affected enough to matter as long as the conductor temperature is within its rating. But the calculated ampacity will be different.

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