When we take the travel trailer to the in-laws, we are lacking some distance from where our trailer can park vs. where their closest standard 120V outside outlet is located. We have a 30 amp 15' foot shore cord and 30 amp 20' foot extension cord, and I'm still lacking 15' feet. Can I add a 3rd 30 amp extension cord to make up the difference? We will be running a rooftop A/C unit, so that's why I want to make sure that we have enough amps at that distance. Also, we will be using a 30 amp dogbone at the outlet. Thanks!

Yes, but may be hard to run the A/C.

I would monitor the voltage while ht e AC is running. Shut it down if too low.Also check all the connection points at the ext. cords from time to time for excess heat.

Hi,You can run as much as you want but every additional foot will add to voltage drop. Monitor the voltage or get an autoformer.

I tried pretty much the same thing at a buddies cabin with #10 and #12 wire extensions. Bottom line is, glad I had my 3k Honda gen because it wouldn't pull my 13.5 air with everything else off.It's one of those things you'll just have to try yourself to find out for sure.

ScottG wrote:I would monitor the voltage while ht e AC is running. Shut it down if too low.I have an AC Voltage Line Meter, so I will do that for sure ScottG wrote:Also check all the connection points at the ext. cords from time to time for excess heat.I assume that excess heat at the connection points is a sign that the voltage is too low? That's one reason why I'm using a dogbone instead of those cheap adaptor plugs that DO get HOT.

How many extension cords can you string together?

dieselenthusias
Explorer
May 31, 2014
pianotuna wrote:
or get an autoformer.

I've never heard of the autoformer. I did a quick google and found the Hughes Autoformer. Looks like a nice setup.
dieselenthusias
Explorer
May 31, 2014
ScottG wrote:
I would monitor the voltage while ht e AC is running. Shut it down if too low.

I have an AC Voltage Line Meter, so I will do that for sure

ScottG wrote:

Also check all the connection points at the ext. cords from time to time for excess heat.

I assume that excess heat at the connection points is a sign that the voltage is too low? That's one reason why I'm using a dogbone instead of those cheap adaptor plugs that DO get HOT.
jaycocreek
Explorer II
May 31, 2014
I tried pretty much the same thing at a buddies cabin with #10 and #12 wire extensions. Bottom line is, glad I had my 3k Honda gen because it wouldn't pull my 13.5 air with everything else off.

It's one of those things you'll just have to try yourself to find out for sure.
pianotuna
Nomad III
May 31, 2014
Hi,

You can run as much as you want but every additional foot will add to voltage drop. Monitor the voltage or get an autoformer.
ScottG
Nomad
May 31, 2014
I would monitor the voltage while ht e AC is running. Shut it down if too low.
Also check all the connection points at the ext. cords from time to time for excess heat.
tvman44
Explorer
May 31, 2014
Yes, but may be hard to run the A/C.

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How many extension cords can you string together?

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