Hooking up 30A at home

[eldel]

I'd really like to be able to run the AC on my rig when I've got it parked outside the house before we take off on a trip. The 110V house supply isn't enough but I do have a 220V / 30A outlet in the garage which is a 14-30 outlet.

I'm looking and reading but I don't see anywhere where I can get a 14-30 to TT-30 converter. 14-50 to TT-30 yes. Is this even possible (assuming that the 14-50 converter just splits 220/50 into 2 x 110/25) or am I looking at wiring in a new circuit?

[coolmom42]

ktmrfs wrote:

coolmom42 wrote:

enblethen wrote:
A NEMA 14-30 is a 30 amp 120/240 device. A standard 50 amp cord body style adapter will not plug into it as the neutral pin is not long enough.
This configuration is used for a dryer. It is four wire, two hots, neutral and ground.
I would suggest if not being used any longer would be to change it out to a fifty amp NEMA 14-50 receptacle, then use a standard 50 amp to 30 amp RV adapter.
If receptacle is needed for some other device, add another box and install a standard 30 TT receptacle. Connect one led of the circuit, neutral and ground. Insure it is wired 120 volts.

Is this a scenario where an electrician could add a box running the wiring off my dryer receptacle?

Am I correct in thinking the dryer should not be running while the RV is plugged in, or the circuit breaker could trip?

it is possible the breaker will trip from overcurrent depending on the AC draw. However I suspect it may also be against NEC or local code, the dryer is a dedicated circuit and may only allow one outlet. The RV outlet would likely be onsidered a dedicated device as well and breaker would need to be sized to cover both loads at once. Total load is limited to something like 80% of breaker rating.

Best advice if you want to do this is to get an electrician who is knowlegeable about the RV-30 outlet as well so he doesn't wire it as a 220V circuit!

Good point about the code. I will need to sell this house at some point in the future, so that's important. All of this is fairly close to the breaker box, and there is plenty of room for a dedicated 110 V 30 amp in it.


I will tell the electrician exactly what I need, very clearly, and then check it myself before plugging in. 😄

[enblethen]

The receptacle in question, is it being used for dryer? If so he dryer would need to be un-plugged to use for RV. If this works, to unplug dryer, you could change the dryer pigtail out to a range 50 amp.
If it is not being used, it would be good.
Big question pops into my mind, did someone install a four wire receptacle on a three wire system. If so all bets are off!

[ktmrfs]

coolmom42 wrote:

enblethen wrote:
A NEMA 14-30 is a 30 amp 120/240 device. A standard 50 amp cord body style adapter will not plug into it as the neutral pin is not long enough.
This configuration is used for a dryer. It is four wire, two hots, neutral and ground.
I would suggest if not being used any longer would be to change it out to a fifty amp NEMA 14-50 receptacle, then use a standard 50 amp to 30 amp RV adapter.
If receptacle is needed for some other device, add another box and install a standard 30 TT receptacle. Connect one led of the circuit, neutral and ground. Insure it is wired 120 volts.

Is this a scenario where an electrician could add a box running the wiring off my dryer receptacle?

Am I correct in thinking the dryer should not be running while the RV is plugged in, or the circuit breaker could trip?

it is possible the breaker will trip from overcurrent depending on the AC draw. However I suspect it may also be against NEC or local code, the dryer is a dedicated circuit and may only allow one outlet. The RV outlet would likely be onsidered a dedicated device as well and breaker would need to be sized to cover both loads at once. Total load is limited to something like 80% of breaker rating.

Best advice if you want to do this is to get an electrician who is knowlegeable about the RV-30 outlet as well so he doesn't wire it as a 220V circuit!

[coolmom42]

enblethen wrote:
A NEMA 14-30 is a 30 amp 120/240 device. A standard 50 amp cord body style adapter will not plug into it as the neutral pin is not long enough.
This configuration is used for a dryer. It is four wire, two hots, neutral and ground.
I would suggest if not being used any longer would be to change it out to a fifty amp NEMA 14-50 receptacle, then use a standard 50 amp to 30 amp RV adapter.
If receptacle is needed for some other device, add another box and install a standard 30 TT receptacle. Connect one led of the circuit, neutral and ground. Insure it is wired 120 volts.

Is this a scenario where an electrician could add a box running the wiring off my dryer receptacle?

Am I correct in thinking the dryer should not be running while the RV is plugged in, or the circuit breaker could trip?

[Old-Biscuit]

enblethen wrote:
A NEMA 14-30 is a 30 amp 120/240 device. A standard 50 amp cord body style adapter will not plug into it as the neutral pin is not long enough.
This configuration is used for a dryer. It is four wire, two hots, neutral and ground.
I would suggest if not being used any longer would be to change it out to a fifty amp NEMA 14-50 receptacle, then use a standard 50 amp to 30 amp RV adapter.
If receptacle is needed for some other device, add another box and install a standard 30 TT receptacle. Connect one led of the circuit, neutral and ground. Insure it is wired 120 volts.

Do THIS^^^^^^^
Simple swap of receptacles
And be done with it!

[wnjj]

Buy a dryer cord and a 30A RV female receptacle and make an adapter if there isn’t one available.

Here’s one but kind of expensive if you ask me. https://www.amazon.com/AC-WORKS-Generator-Adapter-4-Prong/dp/B07WN9ZZ6W?th=1

[enblethen]

A NEMA 14-30 is a 30 amp 120/240 device. A standard 50 amp cord body style adapter will not plug into it as the neutral pin is not long enough.
This configuration is used for a dryer. It is four wire, two hots, neutral and ground.
I would suggest if not being used any longer would be to change it out to a fifty amp NEMA 14-50 receptacle, then use a standard 50 amp to 30 amp RV adapter.
If receptacle is needed for some other device, add another box and install a standard 30 TT receptacle. Connect one led of the circuit, neutral and ground. Insure it is wired 120 volts.

[time2roll]

dougrainer wrote:
I would get a replacement RV MALE 50 amp end and install the standard 30 amp shore cord extension.

The 14-30 connector has an L shaped neutral, 50a has a flat blade.

[BB_TX]

......

[wa8yxm]

eldel wrote:
I'd really like to be able to run the AC on my rig when I've got it parked outside the house before we take off on a trip. The 110V house supply isn't enough but I do have a 220V / 30A outlet in the garage which is a 14-30 outlet.

I'm looking and reading but I don't see anywhere where I can get a 14-30 to TT-30 converter. 14-50 to TT-30 yes. Is this even possible (assuming that the 14-50 converter just splits 220/50 into 2 x 110/25) or am I looking at wiring in a new circuit?

TT-30 outlets are 120 volts. DO NOT PLUG INTO A 30 amp 240 volt outlet or you will regret it.

If the outlet is 4 wire then an adapter can be fabricated
if not.. You will need an electrician to re-wire it and replace it with a proper TT-30 (That can be done. it's very easy but since there is a danger I hesitate to tell you how)

[dougrainer]

I would get a replacement RV MALE 50 amp end and install the standard 30 amp shore cord extension. Cut the MALE end off the 30 amp extension cord. Install the 30 amp 3 wires to the 50 amp replacement head. Hot to one of the L1 or L2 of the replacement 50 amp end and then install the neutral and ground on the correct pins on that 50 amp replacement head. He now has a correct adapted plug and extra 30 amp cord to plug into his RV. Doug

[azdryheat]

I did 30 amp at my house. Home Depot had the RV 30amp plug receptacle and I used 10 gauge wire, as I recall.

[time2roll]

theoldwizard1 wrote:

eldel wrote:
I'm looking and reading but I don't see anywhere where I can get a 14-30 to TT-30 converter (adapter).

NEMA 14-30 to TT30

or it you want one with a pigtail

NEMA 14-30 to TT30

Those are generator adapters that twist lock. I assume the OP needs a straight blade 14-30P.

I would get a 30-TT pigtail and wire it to a Hubble 14-30 plug.
One hot of the plug will not be connected.

For a longer cord get a 30 amp RV extension and cut the male connector off.

[theoldwizard1]

eldel wrote:
I'm looking and reading but I don't see anywhere where I can get a 14-30 to TT-30 converter (adapter).

NEMA 14-30 to TT30

or it you want one with a pigtail

NEMA 14-30 to TT30

[cwit]

Put in a new 10 gauge 30 amp 120 circuit.