Douglas17313 Posted July 18, 2017 Share Posted July 18, 2017 When adding a 25' extension cord to my 1987 Conquest, which amp size should I purchase? Quote Link to comment Share on other sites More sharing options...
WME Posted July 18, 2017 Share Posted July 18, 2017 12 ga should do it. Quote Link to comment Share on other sites More sharing options...
Maineah Posted July 18, 2017 Share Posted July 18, 2017 (edited) What are you trying to run?. Your cord is already 25' long add AC, battery charger, lighting, fridge and you probably want to bump that up to a #10 just for line loss. Edited July 18, 2017 by Maineah Quote Link to comment Share on other sites More sharing options...
Nam Posted July 27, 2017 Share Posted July 27, 2017 Standard RV cord is #10AWG rated for 30A for about 20ft. It all depends on your load Quote Link to comment Share on other sites More sharing options...
DanAatTheCape Posted July 27, 2017 Share Posted July 27, 2017 if you plan to run AC or heat, I would go with 10 or even 8 if I could find it reasonable. Quote Link to comment Share on other sites More sharing options...
jmowrey Posted July 27, 2017 Share Posted July 27, 2017 At home, I use four standard 20 foot RV extension cords (#10 AWG) combined with the cord that is already attached to the RV, for a total of nearly 100 feet. I plug into a 30 amp breaker. I've had no problems with this setup. Been doing it for years. I run the AC and everything else. Quote Link to comment Share on other sites More sharing options...
Maineah Posted July 27, 2017 Share Posted July 27, 2017 3 minutes ago, jmowrey said: At home, I use four standard 20 foot RV extension cords (#10 AWG) combined with the cord that is already attached to the RV, for a total of nearly 100 feet. I plug into a 30 amp breaker. I've had no problems with this setup. Been doing it for years. I run the AC and everything else. If you are using #10 copper for the entire run it is in the acceptable range for a 20 amp load. Drawing 30 amps it won't cut it and things like AC units will suffer so you are probably safe. Quote Link to comment Share on other sites More sharing options...
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