"Tuno" wrote in message
...
I want to pack a 50 foot extension cord to use with the motorhome (on
a 20 amp circuit) and I want to get something "gauge appropriate".

In general, you need at least a #12 conductor to safely conduct 20 amps
(#14 for 15 amps). For a 50 foot 20-amp cable, I would prefer #10 for less
voltage drop (highest efficiency).

Vaughn