30 A plug to 50 A receptacle.

[roadglide]

This is for home use. I have 30 A pedestal 30 amp cable the receptacle is bad . I ordered 5o A yellow receptacle I would like to wire my cable 30 amp cable. I think it’s straight forward. I could use some advice on wiring the 30 amp black ,white and green to this plug .

[bobbecky]

This is a 30 amp RV receptacle, and it will only have three wire terminals on the back. https://www.amazon.com/Legrand-Seymo...629313&sr=8-12

This is a 50 amp RV receptacle, and it will have four wire terminals on the back. https://www.amazon.com/Enerlites-Rec...629398&sr=8-10

In your photo, this does not appear to be the correct receptacle for RV use, as the white neutral and the green ground look to be in the wrong positions, which are usually on opposite sides, top for the green ground and bottom for the white neutral. For the 50 amp receptacle, it should state somewhere that it is a NEMA 14-50R, which is the only receptacle you should be using. If you are wanting to plug a 30 amp cord into a receptacle, it will have this information on it, NEMA TT-30R.

If you are not sure what you are doing, please stop and get someone who is qualified, because wiring something wrong can cause a costly incident, not only to your trailer but also to you.

[roadglide]

Originally Posted by bobbecky

This is a 30 amp RV receptacle, and it will only have three wire terminals on the back. https://www.amazon.com/Legrand-Seymo...629313&sr=8-12

This is a 50 amp RV receptacle, and it will have four wire terminals on the back. https://www.amazon.com/Enerlites-Rec...629398&sr=8-10

In your photo, this does not appear to be the correct receptacle for RV use, as the white neutral and the green ground look to be in the wrong positions, which are usually on opposite sides, top for the green ground and bottom for the white neutral. For the 50 amp receptacle, it should state somewhere that it is a NEMA 14-50R, which is the only receptacle you should be using. If you are wanting to plug a 30 amp cord into a receptacle, it will have this information on it, NEMA TT-30R.

If you are not sure what you are doing, please stop and get someone who is qualified, because wiring something wrong can cause a costly incident, not only to your trailer but also to you.

It’s a 50 amp range receptacle the link you have posted. The Receptacle I show is a push and twist into my 50 amp rv. My thought is why buy a new30 amp receptacle for the cable and turn around and have to buy a 30 to 50 amp dog bone.

[roadglide]

I have the white , green and black assume the Y is where the black would connect or the X .

[bobbecky]

The black and red terminals are both hot legs, the green is ground and the white is the neutral. The 50 amp outlet I referenced is both the RV 50 amp and also used as a range outlet. If you have four wires at the trailer, you really need to install the proper trailer receptacle for the four wire cable inside the trailer, which is probably like this receptacle that you have. https://www.amazon.com/Leisure-Power...641345&sr=8-42
If you are normally only connecting to 30 amp with a 30 amp cord, get one of these to make the 50 amp trailer work with a 30 amp shore cable. https://www.amazon.com/Adapter-Exten...641702&sr=8-40

[flybouy]

Originally Posted by roadglide

This is for home use. I have 30 A pedestal 30 amp cable the receptacle is bad . I ordered 5o A yellow receptacle I would like to wire my cable 30 amp cable. I think it’s straight forward. I could use some advice on wiring the 30 amp black ,white and green to this plug .

I'm confused, I know, it happens a lot. So if I'm understanding this correctly you have a 50 amp trailer. You also have a 30 amp RV outlet wired to your house. I think you are attempting to replace yhat 30 amp outlet with a 50 amp outlet to avoid buying a dog bone adapter.

If my understanding above is correct, then that would violate national electric codes. Those codes are written to protect yhd public ftom electrocuyion and fires ftom overloading circuts. Spend the money and buy the dog hone adapter. Chances sre you will need it while camping some day. If I've vompletly missed you're intentions then help me understand whwt you wang to do.

[roadglide]

30 amp plug receptacle same 30 amp cable connected to a 50 amp RV twist plug.

[roadglide]

I hope the pictures explain. I don’t have a 50 to 30 amp dog bone never used one . I’m using 15 amp extension cord .

[flybouy]

Originally Posted by roadglide

I hope the pictures explain. I don’t have a 50 to 30 amp dog bone never used one . I’m using 15 amp extension cord .

Even worse. A 15 amp extension cord ( that would be a 14 ga. Or larger wire) should be controlled by a 15 amp breaker. Plugging a light extension cord into a higher rated circuit and the extension cord will become a fuseable link and melting down, catching fire before the breaker ever trips.

[roadglide]

Yup for battery tender .

[rhagfo]

Originally Posted by roadglide

I hope the pictures explain. I don’t have a 50 to 30 amp dog bone never used one . I’m using 15 amp extension cord .

Originally Posted by flybouy

Even worse. A 15 amp extension cord ( that would be a 14 ga. Or larger wire) should be controlled by a 15 amp breaker. Plugging a light extension cord into a higher rated circuit and the extension cord will become a fuseable link and melting down, catching fire before the breaker ever trips.

X2!!!!
WOW using a 15 amp cord, likely 14 gauge, in a circuit protected to 30 amps is looking at a great fire starter!!!

Roadglide, do your self a BIG favor, and go buy a 30 amp to 50 amp dogbone, and use your regular 50 amp cord!

[rhagfo]

Roadglide, install a battery disconnect switch and forget the battery tender, fully disconnected the batteries will hold a charge for a very long time.
You are looking to build a fire starter!!!
Not to mention your Rube Goldburg solution has cost more than a 30 to 50 amp dog bone!

[roadglide]

30 amp Pedestal behind my pole barn. Tired of dragging the 50 amp cable out when I need to charge batteries or run the AC.

[roadglide]

Originally Posted by rhagfo

Roadglide, install a battery disconnect switch and forget the battery tender, fully disconnected the batteries will hold a charge for a very long time.
You are looking to build a fire starter!!!
Not to mention your Rube Goldburg solution has cost more than a 30 to 50 amp dog bone!

That’s not going to happen I’m having good luck with the four amp battery tender And going on 4 years with my three AGM batteries.

[roadglide]

Originally Posted by roadglide

Yup for battery tender .

Three wires going into 50 amp RV plug Coming from a 30 amp service . I don’t see any danger I’m not sure how to wire it To the plug in the picture. This is set up for my home use and the pole barn. By the way forget for the battery tender that was intended on another post.

[flybouy]

Originally Posted by roadglide

Yup for battery tender .

Essentially what you are doing is creating your own dogbone 50 to 30 amp. What a 50 amp female to 30 amp male plug does is connect the two hot legs (red and black) via a jumper to power both buss bars of the electrical panel. I know they sell adapters to do this and it has been of great debate for many years how these are sold legally.

Your 50 amp camper has two 50 amp buss bars protected by a 50 amp breaker on each leg. That's not an issue if you don't exceed 50 amps on either leg. When plugged into a 30 amp outlet via a 30 amp cable (10 ga wire). Now you can draw any combination on the two legs to TOTAL 30 amps.So let's say you can run 1 a/c unit and the fridge on 120 v without issue.

So take that last sentence above and insert a 15 amp cord in-between the 50 amp camper and the 30 amp shore power. Now iof you turn on one air conditioner and say the fridge or water heater and you exceed the ampacity of the 15 amp wire. There's nothing to protect that wire from overheating and catching fire. You could have double the amps running thru that wire than it was designed for and as far as the breakers in the camper and the 30 amp breaker protecting the outlet all is well.

Now while YOU may know not to turn on anything in the camper do you trust your kids, DW or other person not to? What if someone breaks in and Goldilocks says "it's too hot" and turns the air conditioners on? You could wake up to your pole barn and camper in ashes. It's sort of like towing a car with your truck. You have a 10K tow rope attached but it's too short so you tie up some 1/2" polypropylene line to it and go on your way. It's a disaster waiting to happen.

[roadglide]

Electrician said white, Green, and black to the Y. 30 amp plug in pedestal to a 50 amp RV plug , Still 30 AMPs . It’s not code but nothing will happen. I will Check it with a meter .

[JRTJH]

Jerry,

I think the concern is that you're plugging in a 15 amp (or 20 amp) extension cord into a 30 amp plug (protected by a 30 amp breaker) to power a 50 amp plug (protected by a 50 amp breaker)....

The concern is not how many volts a multimeter would read, but how many amps that 15 amp extension cord would be carrying before the 30 amp breaker sensed an overload.... Hot wires is the concern. It's the amps, not volts carried over the extension cord before the breaker opens that's the worry....

[roadglide]

Originally Posted by JRTJH

Jerry,

I think the concern is that you're plugging in a 15 amp (or 20 amp) extension cord into a 30 amp plug (protected by a 30 amp breaker) to power a 50 amp plug (protected by a 50 amp breaker)....

The concern is not how many volts a multimeter would read, but how many amps that 15 amp extension cord would be carrying before the 30 amp breaker sensed an overload.... Hot wires is the concern. It's the amps, not volts carried over the extension cord before the breaker opens that's the worry....

I agree but the 15 amp extension cord it’s plugged into 30 amp box with a dog bone to power my 4 amp battery mender. I have a 30 amp and 50 amp power cord. The 30 amp cord is trash receptacle end. I would like to put a 50 amp RV plug that will plug into my 50 amp camper . I would like to put a 50 amp RV plug that will plug into my 50 amp camper there is no way I’m not trying to run 50 A through a 30 amp cord .

[notanlines]

Jerry, I don't think this is what is being suggested. Go back and read the previous posts slowly and I think you'll see where the problem and solution lie.