Electric Cable

The trailer only requires 30 amp plug in if your going to be running lots of stuff at once out there. Is this to keep the battery charged when parked or is someone going to be living in it?

I would use 8/2 wire for this, due to the 100' length.

I would buy an RV30 power outlet box, with the added 20 amp outlet, and integrated breakers.

I went with a Connecticut Electric box, which was all wired from the factory. I just connected the 8/2 to the lugs.

Jerry

Hi,

In Canada it would be against code to add a 15 amp outlet.

I'd be looking at #6 wire for such a long run. That would allow the box to be upgraded to 50 amp, if and when the time comes that you change RV's to a 50 amp unit.

donn0128 wrote:
The trailer only requires 30 amp plug in if your going to be running lots of stuff at once out there. Is this to keep the battery charged when parked or is someone going to be living in it?

Nobody living in it but we would like to run the AC from time to time.

MFL wrote:
I would use 8/2 wire for this, due to the 100' length.

I would buy an RV30 power outlet box, with the added 20 amp outlet, and integrated breakers.

I went with a Connecticut Electric box, which was all wired from the factory. I just connected the 8/2 to the lugs.

Jerry

Sounds like what I would like. I will look into this.

pianotuna wrote:
Hi,

In Canada it would be against code to add a 15 amp outlet.

I'd be looking at #6 wire for such a long run. That would allow the box to be upgraded to 50 amp, if and when the time comes that you change RV's to a 50 amp unit.

Thanks. Good point.

The 10 awg wire will carry the load just fine and attaching a common 15 or 20 receptacle to the 30A circuit/wire is OK per NEC. You do not need to run 8/2 unless you plan on maxing out both outlets at the same time.
Personally, I am at exactly 100' with 10awg and I have ample voltage with AC running.

When I did this, I figured that it was no harder to go all the way. That way, if I ever upgraded my rig, I wouldn't have to re-do the electric.

I put in 6/3 w/g (ground was 10g), a 50/30/20GFI pedestal and powered it from a 50 amp breaker.

No need to upgrade. Ever.

It wasn't even that much more expensive. Of course, I only had about a 30 foot run.

Couple things....the TT takes 30A, but you really only need 30A to run the a/c. If you are just plugging in to keep the batteries charged, then 20A would be sufficient.

100' is a long run, if you want to draw the full 30A with less than the recommended 3% voltage drop, you need #6 wire.

Again, if you plan to run the a/c in the trailer, then I would put the convenience outlet on a separate circuit so you have the full 30A available for the trailer.

Technically you can run a shared neutral for both circuits, but only if circuits are on separate phases and have a common trip breaker like this. Note that this is the same breaker that would use for a 220v circuit (like a dryer) but can be used to power two separate 120v circuits using a shared neutral.



The problem is you wind up supplying 30a to a 20a convenience outlet, and that doesn't meet code.

A better alternative would be to use a box like this on your post:



(click pic for link)

The breaker limits the current on the convenience outlet to 20A and also provides the required GFCI protection for the convenience outlet.

Then you can run 6/3 UF cable (not NM), or go with 4 #6 THHN conductors (black, red, white, green) in a 1" plastic conduit, use the 30a common trip breaker shown above, then you will have 2 circuits at the post, virtually no voltage drop on either, and the whole set up will be code compliant.

The other option is just run the one 30a circuit for the trailer, and use the outside outlet on the trailer as your convenience outlet. When we lived on LI I ran 8/2 about 50' and mounted one of these on a pole:



I used the TT outlets for convenience outlets. One 30a breaker, was a lot simpler, and worked for me since I hardly ever plugged anything else in out there except for the buffer when I was waxing the trailer.

Either the cable or conduit needs to be buried 18" deep, so I would definitely recommend renting a trenching machine, then have then at Mid-Island Rentals in Middle Island.

Thank you everyone for the ideas. Lot's of disparity on the wire gauge though.

You must have lived near me Burbman. Middle Island is only a couple towns away.