50 amp split to 2 30 amp cord?

[wajell]

Originally Posted by twinboat

The park has 50 amp service, the RV don't.

Correct.

[happy2rv]

Originally Posted by wajell

Old topic but new to me. I have a 1988 Holiday Rambler Class A which is 30 amp. I'm stuck in the Rio Grand Valley - and it is HOT. I want to be able to run 2 roof ACs during portions of the day. This unit used to have a generator (another story) but it is gone.

BUT it does have 2 separate 30 amp circuit breaker boxes AND a 3 position dial switch marked front-air-rear. I was told that with the generator (6.5Kw) running and the switch in the middle you could run both ACs at the same time.

So, if I split a 50amp connection into 2 30 amp plugs AND run one 30 as normal AND use the remaining generator wiring to bring another 30 amps to the 2nd box I should be OK with that switch in the middle position. ????

The splitter is a Conntek 15961 Generator Y Adapter 50 Amp Plug to (2) RV 30 Amp Connector.

Without understanding your specific wiring, which has apparently been "retrofitted", I would say no. The generator was supplying 50A. If you could hook 50A the panel the generator originally supplied, you would be able to run both air conditioners. Having said that, since you have two 30A connections, there's no telling how things have been rewired.



Two 30A circuits will certainly run both air conditioners, but the original wiring would have been setup for 50A from the generator and 30A from shore power.



For anyone looking to do what the original poster was, which was split the 50A to 30A and 15/20A for "outside" stuff, it can be done, but as noted throughout the thread, precaution must be taken to protect the 20A side. The RV's main breaker will protect the 30A RV side. You could use one of these: https://www.amazon.com/Parkworld-Spl...dp/B075VT8YZK/ which splits the 50A to 30A + 20A and plug one of these: https://www.amazon.com/Yellow-Jacket.../dp/B003EA6TM6 into it to provide GFCI and overload protection. I believe that has a 15A circuit breaker in the switch. However, for most parks this is a moot point. Almost every pedestal I've ever seen already has the breakout in place with a 50A outlet, 30A outlet, and 20A GFCI.

[wajell]

Originally Posted by happy2rv

Without understanding your specific wiring, which has apparently been "retrofitted", I would say no. The generator was supplying 50A. If you could hook 50A the panel the generator originally supplied, you would be able to run both air conditioners. Having said that, since you have two 30A connections, there's no telling how things have been rewired.



Two 30A circuits will certainly run both air conditioners, but the original wiring would have been setup for 50A from the generator and 30A from shore power.



For anyone looking to do what the original poster was, which was split the 50A to 30A and 15/20A for "outside" stuff, it can be done, but as noted throughout the thread, precaution must be taken to protect the 20A side. The RV's main breaker will protect the 30A RV side. You could use one of these: https://www.amazon.com/Parkworld-Spl...dp/B075VT8YZK/ which splits the 50A to 30A + 20A and plug one of these: https://www.amazon.com/Yellow-Jacket.../dp/B003EA6TM6 into it to provide GFCI and overload protection. I believe that has a 15A circuit breaker in the switch. However, for most parks this is a moot point. Almost every pedestal I've ever seen already has the breakout in place with a 50A outlet, 30A outlet, and 20A GFCI.

Not the OP. But this appears to be the original wiring and not retrofitted. The 1988 RV has (2) 120VAC fuse boxes. The secondary containing a 30 amp main breaker and another 30 amp breaker labeled AC. I think it will only require an electrician to hook up the "splitter" to mimic the generator output.

Hoping!

[twinboat]

Originally Posted by happy2rv

Without understanding your specific wiring, which has apparently been "retrofitted", I would say no. The generator was supplying 50A. If you could hook 50A the panel the generator originally supplied, you would be able to run both air conditioners. Having said that, since you have two 30A connections, there's no telling how things have been rewired.



Two 30A circuits will certainly run both air conditioners, but the original wiring would have been setup for 50A from the generator and 30A from shore power.



For anyone looking to do what the original poster was, which was split the 50A to 30A and 15/20A for "outside" stuff, it can be done, but as noted throughout the thread, precaution must be taken to protect the 20A side. The RV's main breaker will protect the 30A RV side. You could use one of these: https://www.amazon.com/Parkworld-Spl...dp/B075VT8YZK/ which splits the 50A to 30A + 20A and plug one of these: https://www.amazon.com/Yellow-Jacket.../dp/B003EA6TM6 into it to provide GFCI and overload protection. I believe that has a 15A circuit breaker in the switch. However, for most parks this is a moot point. Almost every pedestal I've ever seen already has the breakout in place with a 50A outlet, 30A outlet, and 20A GFCI.

The original generator did not output 50 amps.

Back then they had 2 outputs, one was 30 amps for the RV systems, along with a choice of one air conditioner, and a seperate 20 amp circuit just for the second air conditioner.

You could not run both on 30 amp shore power, but could run both on generator.

Besides, today's 50 amp power is at 240 volts, split to two 50 amp 120 volt bus bars in the RV breaker box.

[Milford 47]

Originally Posted by twinboat

The park has 50 amp service, the RV don't.

Sometimes it pays to read closer

Easy fix for sure

I am used to going the other route with 30 amp on 100 degree days, not so easy fix

[wajell]

Originally Posted by Gary RVRoamer

Easy-Peasy. Another product that does this:


https://www.amazon.com/RV-Cord-Adapt...dp/B073WB5LBY/


Splits a 50A/240v outlet to dual 30A/120v. If you need 15A/120v outlets, add a 15A-->30A adapter to either or both sides.

I probably should have started a new thread on this.

I read a post of yours about 10 years ago on another website and I think you nailed it.

It all depends on how that switch is wired. Assuming that with the genny running, then all 3 positions are valid. Front/Both/Rear.

But with the genny removed it should be OK to hotwire the one leg of the splitter to the rear A/C, but you don't want the regular shore power getting back there too.

I think I could figure this out but I will probably call in an electrician to make sure it is done right.

[SmilingSam]

I believe you are wrong on that.
50amp conn is just 2 25amp circuits, that is why the power cord is 2x the weight of a 30amp - 2x the wire.


you can configure it for 240v or 2 110v ckts, nothing fancy, and if a power control it will likely control both 110v, as nothing much is 240v.


most/all generators have 2 110v outputs, usually one for whole house, 1 for the 2nd a/c and usually not much else - otherwise the power shedding control gets complicated.


the auto-switch may or may not have 2 110 ckts, most will and easy if only the 2nd a/c on the 2nd 110v leg - but if a 50amp version then it will correctly control both.

Originally Posted by Ramblin

I think he's wanting to plug into a single 50A service and get two 110V outlets. Its certainly do-able, but you'd have two 50A 110V outlets, so you'd have to be careful not to overload them or run the risk of melting your 20A max drop cords. The breaker won't protect you.

[Sbrownstein]

Originally Posted by SmilingSam

I believe you are wrong on that...

Nope, he is completely right. 50 amp RV service is 50 amps 230 volts with a ground and a neutral. That means two 50 amp 115 volt circuits or one 50 amp 230 volt circuit. The splitter will supply two 50 amp 115 volt legs and you will never pop the 50 amp breaker without melting a 115 volt extension cord.

[twinboat]

Originally Posted by SmilingSam

50amp conn is just 2 25amp circuits, that is why the power cord is 2x the weight of a 30amp - 2x the wire.
..............

This is about a wrong as it can be.

If you look at any 50 amp breaker, you will see its 2 breakers in one.

50 amps service is 2 25 amp circuits.

The power cord is heavy because it uses heavier wire.

With the opening sentence being so wrong, I didn't even read or comment on the rest.

Here is some reading on RV electric service. This one gets down to it pretty good.

https://www.rvtechmag.com/electrical/chapter3.php

[wajell]

Originally Posted by twinboat

This is about a wrong as it can be.

If you look at any 50 amp breaker, you will see its 2 breakers in one.

50 amps service is 2 25 amp circuits.

The power cord is heavy because it uses heavier wire.

With the opening sentence being so wrong, I didn't even read or comment on the rest.

Here is some reading on RV electric service. This one gets down to it pretty good.

https://www.rvtechmag.com/electrical/chapter3.php

You might want to RE-READ the link that you posted.
You:
"50 amps service is 2 25 amp circuits." Wrong.

Article:
"The split phase service means you have two 120 volt 50 amp poles, which gives you a total of up to 12,000 watts."

12,000 watts = 120 volts x 100 amps