Forum Discussion

mustanglover32's avatar
mustanglover32
Explorer
Feb 14, 2017

Running A/C with extension cord into 20 amp outlet.

Trying to figure out if what I'm trying to run below is moving too close to the limits of a 20 amp 120V outlet and limits of a 12 gauge extension cord that is 25 feet. Trying to run a 135K BTU A/C ...
ScottG's avatar
ScottG
Nomad
Feb 14, 2017
In theory it should be fine but if any one part is questionable, like a
worn connection someplace, it will cause heat and you'll have a problem.
I would try it for a while and monitor the connections.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,344 PostsLatest Activity: Dec 26, 2025