power cord size?

smkettner wrote:
I would not cobble multiple extension cords to run an air conditioner 125' away.

SoundGuy wrote:
Cobble? :h Isn't that what I just described is an everyday occurrence here in the Ontario provincial park system where it's not unusual at all to find the campsite service post 100' or more from where the trailer is parked? The OP has described this as a one time event, he's hardly going to put any $$$ into a special installation for that. Run the cable, monitor the source voltage and ensuing voltage drop, and if it's over 104 vac under load don't worry about it ... just what I do whenever I camp here in Ontario. ;)

smkettner wrote:
Yes. I do not recommend three random extension cords extended out 125' to run the air conditioner in an RV to be monitored by a guest.

How would we know if they are #12, #14 or even #16 wire?

How old and abused are the connectors?

Three random cords from my garage would be a disaster. Might need four...

What in the world does this have to do with grabbing "random" 12, 14, or "even" 16 gauge cables from one's garage? :h The OP said very clearly in his very first post -

"I had to move my 5th wheel approx. 125 ft. from a power source on my property. I have some large guage power cords. What size would I need to run my 11.5 AC for all day?"

Furthermore, I said myself - "All we know is he wants to temporarily locate his rig 125' from it's normal source feed and for that I'd suggest he run the necessary length of 10 gauge, monitor the source voltage under load, and if it's above 104 vac then that will suffice for the purpose he has in mind. If he doesn't have sufficient 30 amp / 10 gauge cable (and if necessary a 50/30 dogbone) perhaps he can borrow these items to get him through this brief scenario."

No where has anyone, myself included, suggested just grabbing light weight cable from one's garage and just "cobbling" it together. Talk about distorting what was actually said! :S