Converting to dual Li time 200 AH batteries. I have a 2019 momentum toy hauler.

[huntindog]

The instructions for my 80 amp PD stated that it needed a 20 amp receptcle.
I scratched my head on this for awhile as my previous 80 amp on a different TT used a 15A. Then I noticed that the receptcle GD used was rated for 20A, but had a 15 A breaker. So I went with it. I did put a spare 20A breaker in my fixit kit, in case the 15A ever tripped. It never has. That was 5 years ago.
Perhaps the max draw stated is not routinely hit?

 

[RickLight]

FWIW
Amp-hour ratings are irrelevant to amperage output/input rating. How many interior cells is not the wire size.

 

[huntindog]

FWIW
Amp-hour ratings are irrelevant to amperage output/input rating. How many interior cells is not the wire size.

??????????

 

[coglesby]

The instructions for my 80 amp PD stated that it needed a 20 amp receptcle.
I scratched my head on this for awhile as my previous 80 amp on a different TT used a 15A. Then I noticed that the receptcle GD used was rated for 20A, but had a 15 A breaker. So I went with it. I did put a spare 20A breaker in my fixit kit, in case the 15A ever tripped. It never has. That was 5 years ago.
Perhaps the max draw stated is not routinely hit?

Mine had a 15A receptacle but a 20A breaker so I just purchased an adapter rather than change out the receptacle.

 

[huntindog]

Mine had a 15A receptacle but a 20A breaker so I just purchased an adapter rather than change out the receptacle.

I would not do that. there is a risk of the receptacle not being protected by a properly sized 15 amp breaker.

 

[coglesby]

? The wire size is also adequate for 20A and there’s nothing else on that circuit hence the 20A breaker. Where are you getting this info? Please explain

 

[coglesby]

The instructions for my 80 amp PD stated that it needed a 20 amp receptcle.
I scratched my head on this for awhile as my previous 80 amp on a different TT used a 15A. Then I noticed that the receptcle GD used was rated for 20A, but had a 15 A breaker. So I went with it. I did put a spare 20A breaker in my fixit kit, in case the 15A ever tripped. It never has. That was 5 years ago.
Perhaps the max draw stated is not routinely hit?

I would verify the wire size from breaker to receptacle is rated for 20A before replacing the 15 with a 20.

 

[Butcher]

Are the size of the 15A terminals the same size as the 20A terminals? Yes, the angle is different between them, but I always thought the physical dimensions are the same.

 

[huntindog]

I would verify the wire size from breaker to receptacle is rated for 20A before replacing the 15 with a 20.

If yours is like mine, the receptacle is mounted on the back side of the breaker panel. Mine had "20 amp" stated on it.

If yours states "15amp" then using a 20 amp breaker is wrong, and could cause a problem.
How did you determine it's rating?

 

[coglesby]

it doesn’t state anything. A 20A receptacle doesn’t look the same as a 15A receptacle. As long as the wire is 20A there’s no chance there’s a problem. A 20 A Receptacle/Plug is shown below. That’s why I needed an adapter. Alternatively I could have changed out the receptacle.

 

[coglesby]

The breaker is 20A and the wire is 12ga to the electrical box the receptacle is mounted in. 20A receptacle is no different than a 15A other than configured to accept a 20A plug. Safety feature to prevent a 20A appliance being plugged into a 15A only circuit. My circuit is 20A. Not sure why they only put in a 15A receptacle but then again I have no idea why they undersize the 12V wire from converter to battery. They do a lot of stuff that doesn’t make sense

 

[coglesby]

If yours is like mine, the receptacle is mounted on the back side of the breaker panel. Mine had "20 amp" stated on it.

If yours states "15amp" then using a 20 amp breaker is wrong, and could cause a problem.
How did you determine it's rating?

Below is a 15A receptacle. Putting a sticker on it that says 20A doesn’t make it a 20A receptacle. The sticker may indicate that the circuit it is wired to is 20A capable

 

[Butcher]

If anyone wants to put their opinions aside and deal with some facts, check out the WFCO power distribution electrical panel. Most of us have this in our RV's. If you read the manual, it states that they are 20A receptacles.

So, believe what you want, but the facts are what they are.
https://www.wfcotech.com/wp-content...920-Series-ACDistributionCenter-ManualCat.pdf

I do not know why anyone does what they do, but with a ceramic receptacle, 12ga wiring to that receptacle, and a manual that says it's good for 20A is good enough for me.

 

[coglesby]

If anyone wants to put their opinions aside and deal with some facts, check out the WFCO power distribution electrical panel. Most of us have this in our RV's. If you read the manual, it states that they are 20A receptacles.

So, believe what you want, but the facts are what they are.
https://www.wfcotech.com/wp-content...920-Series-ACDistributionCenter-ManualCat.pdf

I do not know why anyone does what they do, but with a ceramic receptacle, 12ga wiring to that receptacle, and a manual that says it's good for 20A is good enough for me.

I agree 110%. That’s why I think it is perfectly fine to buy a 15A to 20A adapter plug to allow me to plug the 20A plug on my converter into the receptacle as long as the wiring and circuit breaker are 20A capable.

When I said I did that huntindog stated that it would risky.

That’s what I was replying too. And then answering his follow up questions.

 

[huntindog]

I agree 110%. That’s why I think it is perfectly fine to buy a 15A to 20A adapter plug to allow me to plug the 20A plug on my converter into the receptacle as long as the wiring and circuit breaker are 20A capable.

When I said I did that huntindog stated that it would risky.

That’s what I was replying too. And then answering his follow up questions.

You are talking oranges. I am talking apples. Your picture is not what I have. I believe Butcher and I have the same setup.

Back to yours now. If your receptacle is a 15 amp, then it is rated that way for a reason. such a recetacle SHOULD have a 15 amp breaker feeding it.
I do not believe there is a grey area in this matter... I know there are some professional Electricians on this board. I would be interested in what they have to say .

 

[coglesby]

You are talking oranges. I am talking apples. Your picture is not what I have. I believe Butcher and I have the same setup.

Back to yours now. If your receptacle is a 15 amp, then it is rated that way for a reason. such a recetacle SHOULD have a 15 amp breaker feeding it.
I do not believe there is a grey area in this matter... I know there are some professional Electricians on this board. I would be interested in what they have to say .

My dad was an electrician and I worked with him for years when I was younger and I’m an electrical engineer.

You either have the one that will accept the 20A plug or you don’t. In the end it’s the wiring that matters and that’s it. Changing the receptacle won’t make it 20A or 15A. I’m not understanding why you think that the receptacle itself is what matters.

Putting a 15A receptacle on a 20A circuit doesn’t make it a 15A circuit any more than putting a 30A receptacle on a 20A circuit make it 30A capable.

I’m agreeing with butcher.

I’m done trying to explain it to you.

 

[huntindog]

You are talking oranges. I am talking apples. Your picture is not what I have. I believe Butcher and I have the same setup.

Back to yours now. If your receptacle is a 15 amp, then it is rated that way for a reason. such a recetacle SHOULD have a 15 amp breaker feeding it.
I do not believe there is a grey area in this matter... I know there are some professional Electricians on this board. I would be interested in what they have to say .

My dad was an electrician and I worked with him for years when I was younger and I’m an electrical engineer.

You either have the one that will accept the 20A plug or you don’t. In the end it’s the wiring that matters and that’s it. Changing the receptacle won’t make it 20A or 15A. I’m not understanding why you think that the receptacle itself is what matters.

Putting a 15A receptacle on a 20A circuit doesn’t make it a 15A circuit any more than putting a 30A receptacle on a 20A circuit make it 30A capable.

I’m agreeing with butcher.

I’m done trying to explain it to you.

I’m not understanding why you think that the receptacle itself is what matters.

That is not what I think. I think that the ratings for ALL of the wiring should meet the SAME minimum spec for the load.
Its a free country. People do all sorts of things that I would not
This is just one more of those things. I actually wish you well, as I do not want any harm . to occur to you and yours because of this.

Good luck and happy travels.

ON EDIT: Why not just spend 10.00 on a 20 amp receptacle?
I will even pay for it if you do it.

 

[huntindog]

it doesn’t state anything. A 20A receptacle doesn’t look the same as a 15A receptacle. As long as the wire is 20A there’s no chance there’s a problem. A 20 A Receptacle/Plug is shown below. That’s why I needed an adapter. Alternatively I could have changed out the receptacle.

it doesn’t state anything. A 20A receptacle doesn’t look the same as a 15A receptacle. As long as the wire is 20A there’s no chance there’s a problem. A 20 A Receptacle/Plug is shown below. That’s why I needed an adapter. Alternatively I could have changed out the receptacle.

I just looked on Home Depot and Ebay,
Both sellers state that a 20 to 15 amp adaptor is rated for a MAX of 15 amps. I then looked at receptacles. 15 amp ones were rated for a MAX of 15 amps,
and 20 amp ones were rated to 20 amps MAX

On top of these facts..... An adaptor like you used cost MORE (7.00) than a 20 amp receptacle (4.00)
So doing it right is actually cheaper than doing it wrong.

 

[Butcher]

In the end it’s the wiring that matters and that’s it.

That is what I figured. Of course, if your terminal is the size of a 15A and you are pushing 50A through it, then the size of the terminal matters. What we are talk about here is that the 15A and 20A terminals are the same size, just a different placement/orientation.

I don't know why they do this except to let the consumer know there is. If you did not know you had a 20A consumer and you were plugging it into a 15A circuit, you may wonder why you have a breaker issue. By changing the end, then the light bulb should go off. I can say, I have never ever purchased a consumer with a 20A style plug. I also know, my shop is fully rated for 20A circuits, including the receptacles.

I do think topics like this, if the players play nice, are extremely informative for others that may chime in, in the future.

 

[coglesby]

That is what I figured. Of course, if your terminal is the size of a 15A and you are pushing 50A through it, then the size of the terminal matters. What we are talk about here is that the 15A and 20A terminals are the same size, just a different placement/orientation.

I don't know why they do this except to let the consumer know there is. If you did not know you had a 20A consumer and you were plugging it into a 15A circuit, you may wonder why you have a breaker issue. By changing the end, then the light bulb should go off. I can say, I have never ever purchased a consumer with a 20A style plug. I also know, my shop is fully rated for 20A circuits, including the receptacles.

I do think topics like this, if the players play nice, are extremely informative for others that may chime in, in the future.

I confirmed safe first. Here’s how I determined the circuit was definitely 20A capable. Although the receptacle was 15A configuration with parallel spades:

1. 20A breaker OEM
2. 12 Gauge wire
3. Receptacle had only one plug in. The other was blanked out.
4. Used VOM to confirm it was the only outlet on that circuit.

Since my new lithium 75A converter had a 20A configuration plug and the receptacle in the RV was 15A configuration, I had to either get an adapter or replace the receptacle. I was unable to find a single outlet 20A configuration receptacle that would fit existing setup and being aware that the only difference between a 20A and a 15A receptacle is the configuration of the face plate and that they are internally the same, I chose to get an adapter and keep everything else original. It did take me a bit to find a 20A capable adapter. Ended up being a pigtail. It looks really good too because everything ends up being original.