Can Multiple RV Power Cords Be Connected Together To Connect To A Power Source 95ft Away

Question:

Can I add a 50foot cord to a 30foot main cord with a 15foot extension to make a total of 95. At what point does the length of cord start to affect how much electricity gets through the line without it becoming dangerous, thanks,

asked by: Gary H

Expert Reply:

The more length you add between the power source and the RV the more voltage drop you'll have. To combat voltage drop the gauge of the wire can be increased. Since you can't really increase the wire gauge on a power cord your only option is to move the RV closer to the power source or find an alternative power source closer to the RV (i.e. generator).

For example, 50 amp wire is usually 6 AWG (we require at least 62.5A and 6 AWG can handle 65A). If you have to power an electric device 100 feet away, you need 20% amps more. Instead of 62.5A, you’re looking at 62.5A × 1.2 = 75A.

In this case, the 6 AWG gauge wire with 65A will not be enough. We need at least 75A. The next wire size that can handle more than 75A is the 4 AWG gauge wire. This one can handle at 85A and is usually used as a 50 amp wire size for 100 feet away sub panels.

So while you technically can connect multiple cords together, like the Mighty Cord RV Extension Cord - 50 Amps - 50' Long # A10-5050E, you'll lose power at the length you're needing.

expert reply by: Kevin C