Heavy-duty extension cord for A/C


Old 06-30-05, 12:15 PM
Visiting Guest
Posts: n/a
Heavy-duty extension cord for A/C

I have a 12,000 BTU A/C unit [115v, 10.2a, 1,100w] and a dedicated single-circuit outlet for same. I want to relocate the unit to another room, which would necessitate running a 25-ft extension cord from the unit to the dedicated outlet. Before I go to Home Depot to get a cord, two local hardware stores claimed I should not attempt to use more than a 15-ft cord at most with such a heavy draw.

Question is simple: can I safely run a 25-ft cord under these circumstances? If so, what are the specs for this cord?

Sponsored Links
Old 06-30-05, 12:24 PM
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,342
You really shouldn't ever use an extension cord for permanent wiring. For this unit, I wouldn't use anything less than a 12 gauge cord. Probably a 10 gauge heavy "construction grade" cord.

I would bet it will be cheaper to install another dedicated outlet in the second bedroom than it will be to buy a cord that heavy. Another outlet is the better solution by far.
Old 06-30-05, 12:31 PM
Visiting Guest
Posts: n/a
Heavy-duty A/C cord

Thanks -- though, as I should have mentioned, this is a rental apartment and I cannot change the wiring in any way. I'll need to come up with a safe, won't-burst-into-flames extension cord solution.

Also, fyi, here are the codes on the A/C unit's native cord, if it matters:

3/14 awg
Type SPT-3

Cheers ~
Old 06-30-05, 12:34 PM
Join Date: Sep 2000
Location: United States
Posts: 18,497
Buy the absolutely shortest extension cord that will reach. And buy the heaviest gauge they sell. As already said, make it at least 10 gauge--8 guage if they have it. It might be sold as something like "extra, extra heavy duty".
Old 06-30-05, 01:16 PM
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,342
One more thing, don't cover the cord with any rugs, furniture, etc. Let it get good air circulation to stay cool. If the cord is a little too long, don't coil it. Instead, "snake" it along the path to use up the extra cord. If you must cross a doorway, buy a rubber cord ramp - don't duct tape the cord to carpet. Don't do anything to crimp the cord either, rolling office chairs, closing doors, walking on it. Extensions cords often fail and burn through where they have been pinched in something.
Old 06-30-05, 03:06 PM
Visiting Guest
Posts: n/a
The proper cord

Thanks all for your very helpful info. I've gone ahead and purchased a Coleman Cable #02607:


Will advise if I succeed, so if there are no further posts, I guess I... didn't...

Cheers, thanks again!

Last edited by JLJones; 06-30-05 at 03:57 PM. Reason: Corrected post
Old 07-07-05, 02:58 PM
Visiting Guest
Posts: n/a

10-gauge, contractor-grade 25' outdoor RV cord arrived yesterday and works perfectly. Thanks all for your help in selecting it.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes