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Old 03-19-2016, 02:14 PM   #1
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Location: North Myrtle Beach, SC
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50 amp plug wiring question

I m planning on wiring a 14-50R outlet for our motorhome. This is the second one I ve done. The first went off without a hitch.

The question is: What gauge of wire should I use for a 75 foot run? I think #4 gauge would work. I used 6 gauge last time, but the run was short, less than half the 75 foot distance.



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Old 03-19-2016, 02:20 PM   #2
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Here is a table that will calculate voltage drop vs length vs wire size.

You can input the parameters to see what you are comfortable with.


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Old 03-19-2016, 02:24 PM   #3
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Wire size is determined by amp/voltage/distance
#6 is good for 50' (half the total distance)

#4 is recommended for 75' (half total distance) 50A at 120V
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