- My Forums
- Tiger Rant
- LSU Recruiting
- SEC Rant
- Saints Talk
- Pelicans Talk
- More Sports Board
- Fantasy Sports
- Golf Board
- Soccer Board
- O-T Lounge
- Tech Board
- Home/Garden Board
- Outdoor Board
- Health/Fitness Board
- Movie/TV Board
- Book Board
- Music Board
- Political Talk
- Money Talk
- Fark Board
- Gaming Board
- Travel Board
- Food/Drink Board
- Ticket Exchange
- TD Help Board
Customize My Forums- View All Forums
- Show Left Links
- Topic Sort Options
- Trending Topics
- Recent Topics
- Active Topics
Started By
Message
Is there a pigtail I should use for this 4-prong 240v outlet to use with a 120v?
Posted on 10/9/16 at 5:17 pm
Posted on 10/9/16 at 5:17 pm
From what I understand, these 4-prong receptacles are really two 120v lines, with one hot wire for the 120v on each phase on the breaker box. I put the volt meter in there and it is 120v in two of the holes, so that bit of information seems to be confirmed.
My question is, how common are these and what adapter, if any, do you use to plug in a travel trailer that has 30amp 120v service? The plug on the TT is 3-prong, of course.
Here's a pic of the outlet:
My question is, how common are these and what adapter, if any, do you use to plug in a travel trailer that has 30amp 120v service? The plug on the TT is 3-prong, of course.
Here's a pic of the outlet:
8
Posted on 10/9/16 at 5:22 pm to Dev Test QAS
That appears to be a 50amp service. You need a 50A to 30A cable.
It'll go from 4 prong to three prong and fit your normal extension cord fro your trailer.
It'll go from 4 prong to three prong and fit your normal extension cord fro your trailer.
Posted on 10/9/16 at 5:29 pm to Dev Test QAS
We call those types of applications turnarounds, I don't know much about trailers, but I think I heard they actually made something for this.
Posted on 10/9/16 at 5:38 pm to Dev Test QAS
I would volt meter out that connection before just plugging in an adapter cord...yo9u want to make sure each leg reads what it supposed to when you go from pole to pole...once you know that it is correct only then use the adapter...
you don't want to accidentally send 220 to your convertor and fry it and other items in the camper...
Start Here
you don't want to accidentally send 220 to your convertor and fry it and other items in the camper...
Start Here
Posted on 10/9/16 at 6:55 pm to Dev Test QAS
If properly wired, the following is a wiring diagram for the L14-30 outlet. 
All 240 services are actually 2 120 poles. 240 pole to pole 120 pole to neutral from each pole.
All 240 services are actually 2 120 poles. 240 pole to pole 120 pole to neutral from each pole.
Posted on 10/9/16 at 7:09 pm to sadertiger15
I'm no genius, but how do you figure that is a 50A service when its says 30A on it?
Posted on 10/9/16 at 7:54 pm to SouthboundTiger
L14-30P to TT30R adapter is what your looking for. Check RV shops.
Posted on 10/9/16 at 8:11 pm to Dev Test QAS
Camco 55382 12" 30Amp Locking 4-Prong Male / 30Amp Standard Female PowerGrip Generator Adapter if you need it now, I've made adapters before for a situation like that, basically just bought a male plug to match the one in the box, some appropriate wire, and a female plug to match the camper.
You just wire it and leave one of the hot legs from the 240v out of the equation.
You just wire it and leave one of the hot legs from the 240v out of the equation.
This post was edited on 10/9/16 at 8:19 pm
Posted on 10/9/16 at 8:15 pm to Dev Test QAS
Instead of going hot to ground (or neutral) to find each phase of 110, be sure to go ACROSS your hots to make sure you have 220.
If they're same phase, hot to ground will still show 110 but hot to hot will show 0. If they're same phase (which they're probably not) you may experience some problems.
If they're same phase, hot to ground will still show 110 but hot to hot will show 0. If they're same phase (which they're probably not) you may experience some problems.
This post was edited on 10/9/16 at 8:17 pm
Posted on 10/9/16 at 9:05 pm to SouthboundTiger
In the camping world, 4 prong plugs are 50A service
Posted on 10/9/16 at 10:09 pm to Dev Test QAS
Just go to the camper store or grainger and tell them what you are trying to do...they will slap it on the counter in a few seconds.
Posted on 10/9/16 at 11:19 pm to Dev Test QAS
Wait what the hell are you dong back story more details please
Posted on 10/9/16 at 11:35 pm to Cracker
Looks like he's trying to get Power to a camper someplace other than a typical campground.
Only place I've seen that style plug is on a generator.
There is a 50amp that looks similar, but the prong spacing/size is different.
Learned that lesson the hard way while putting together generator cords. Went to lowes, and just grabbed without looking closely because they looked so similar.
Needless to say, I had to make another trip for the right plug.
Only place I've seen that style plug is on a generator.
There is a 50amp that looks similar, but the prong spacing/size is different.
Learned that lesson the hard way while putting together generator cords. Went to lowes, and just grabbed without looking closely because they looked so similar.
Needless to say, I had to make another trip for the right plug.
Posted on 10/9/16 at 11:36 pm to Jj283
Dryer stove stove usually 50 dryer 30
Posted on 10/10/16 at 6:35 am to sadertiger15
quote:
In the camping world, 4 prong plugs are 50A service
Not always, the configuration shown is for a 30 amp circuit. I doubt any RV campground could wire that up as 50 amp Since it would not pass inspection and is a fire hazard. You're probably thinking about this configuration.
The 50 amp twist lock plug will visually appear to be a 3 prong because the ground contact is positioned along the side of the plug/socket configuration.
Posted on 10/10/16 at 9:42 am to Jj283
quote:
Only place I've seen that style plug is on a generator.
You're probably on to something there, since the breaker is labeled "generator".
I was expecting not to find any amperage on the outlet because I figured it back feeds into the panel. I was kind of (pleasantly) surprised to say the least, because currently the house is flooded out and I wouldn't mind having an RV hookup anyway.
Is it possible it was originally wired for a generator and then was later modified to provide power service to something? I don't see an interlock on the panel. I was hoping this would be an easy thing to google my way though (and save money), but I may have to hold off until I can get an electrician out.
Posted on 10/10/16 at 9:48 am to Dev Test QAS
If it it doesn't have an interlock in it that's why you have voltage to that outlet. Who ever used it before was backfeeding into the panel from a generator into that plug.
They would turn the breaker on to let power into the panel and then kill the main so they didn't energize the system.
I have the male 50amp version of that on my house, but I also have a disconnect switch.
They would turn the breaker on to let power into the panel and then kill the main so they didn't energize the system.
I have the male 50amp version of that on my house, but I also have a disconnect switch.
This post was edited on 10/10/16 at 9:51 am
Page 1 of 1
Popular
Back to top
Follow TigerDroppings for LSU Football News