EPDM Coatings
rvupgradestore.com Composet Products
RV Life Magazine RV Park Reviews RV Trip Wizard

Author Topic: Shore Power at Home  (Read 16413 times)

Fred and Nit

  • ---
  • Posts: 7
Shore Power at Home
« on: October 02, 2005, 03:16:47 PM »
Obviously I'm new.  My question.  Is is possible to safely connect a 50 amp RV system to a 220 VAC dryer outlet at home?  If so, is there an adapter available to make the transition?  Thanks in advance.

Fred and Nit - New RV'ers and loving it.  However today"s diesel prices may somewhat dampen out enthusiasm.

John From Detroit

  • ---
  • Posts: 20847
  • ^My New Home^
    • Diabetics Forum
Re: Shore Power at Home
« Reply #1 on: October 02, 2005, 03:31:36 PM »
I do not know if there is an adapter but I just did a restore on my HD, let me see if it restored what I just deleted

Here is one URL, I know NOTHING about this company and thus can not recommend either way

http://www.pplmotorhomes.com/parts/rv-power-cords/rv-hookup-50-amp.htm

But you can download the photo, print it out, and take it to a local RV or Electrical supplier.

I have a 30 amp outlet in my back yard. though it's only got a 20 breaker feeding it (the idea is simply battery maintance and possible furnace... No AC load on that line) 

Can't plug in yet, but when I installed the outlet all I had was a 30 amp trailer... Now I have a MH which can use more
Nothing adds excitement like something that is none of your business
My Home is where I park it.

Alaskansnowbirds

  • Forum Staff
  • ---
  • *
  • Posts: 2692
Re: Shore Power at Home
« Reply #2 on: October 02, 2005, 04:06:16 PM »
I do not know if there is an adapter but I just did a restore on my HD, let me see if it restored what I just deleted

Here is one URL, I know NOTHING about this company and thus can not recommend either way

http://www.pplmotorhomes.com/parts/rv-power-cords/rv-hookup-50-amp.htm

But you can download the photo, print it out, and take it to a local RV or Electrical supplier.

I have a 30 amp outlet in my back yard. though it's only got a 20 breaker feeding it (the idea is simply battery maintance and possible furnace... No AC load on that line) 

Can't plug in yet, but when I installed the outlet all I had was a 30 amp trailer... Now I have a MH which can use more

John and Fred,

Both the 50 amp and 30 amp RV receptacles are available at HomeDepot. They are labled right on the box "For RV use"

Don & Peg
Alaska/Arizona
Currently located here.
Weather at Camp Verde, AZ.

Jim Dick

  • Forum Staff
  • ---
  • *
  • Posts: 7675
Re: Shore Power at Home
« Reply #3 on: October 02, 2005, 04:48:10 PM »
Obviously I'm new.  My question.  Is is possible to safely connect a 50 amp RV system to a 220 VAC dryer outlet at home?  If so, is there an adapter available to make the transition?  Thanks in advance.

Fred and Nit - New RV'ers and loving it.  However today"s diesel prices may somewhat dampen out enthusiasm.

Fred,

In a word, NO!!!! An RV 50 amp circuit is NOT 220V. It consists of two 120V legs. Never connect any 220V circuit to an RV. All circuits in an RV are 120 with some exceptions in conversions such as the Prevost. Sometimes they use 220V for the stove. They might even use it for the clothes dryer but I'm not sure.

Jim

Titusville, Florida
U.S. Navy Veteran
2000 American Dream 40' DP
2012 GMC Terrain
2006 Suzuki Boulevard C50T Motorcycle
http://photo.net/photos/jimdick

John From Detroit

  • ---
  • Posts: 20847
  • ^My New Home^
    • Diabetics Forum
Re: Shore Power at Home
« Reply #4 on: October 02, 2005, 11:57:15 PM »
Fred,

In a word, NO!!!! An RV 50 amp circuit is NOT 220V.

uh,   |110-0-110| or 220 volt split phase,   The explanation is complicated but that is how a dryer is wired, Trust me on that, the heat element in the dryer is 220 volt (conects only to the two outer legs) but the timer, motor and control board (if any) are all powered by 110 volt.  Thus the standard dryer outlet is 110-0-110 (or these days it is 120-0-120 but alas, that 10 volts makes no difference)

Most folks just call it 220, but the full name is "240 volt split phase" and the split, is, of course, 120 volts.

That way,,, If you are running everything on one leg of your 50 amp system, you get up to 30 amps (dryers are usually fused or breakered at 30 amps) max on one leg and "Common".  if you are running everythign possible you have 30 amps on both legs (assuming a perfectly balanced rig, which, of course, is a dream) and no current at all on the common.

In days of old, when folks were bold, common might well be the ground itself,,, However that has not been code since about 1942 (WWII to be specific)  I've read some very old electrical books.. Older than I am (I'm a 51 model myself)
Nothing adds excitement like something that is none of your business
My Home is where I park it.

Jim Dick

  • Forum Staff
  • ---
  • *
  • Posts: 7675
Re: Shore Power at Home
« Reply #5 on: October 03, 2005, 07:01:49 AM »
John,

Then I would assume the two legs are different phases. We've had a lot of discussion about hooking 220V. If we are adviising someone they can do it then we better provide a step by step explanation. ;) There seems to be too much confusion on just what a 50amp circuit entails.

Jim

Titusville, Florida
U.S. Navy Veteran
2000 American Dream 40' DP
2012 GMC Terrain
2006 Suzuki Boulevard C50T Motorcycle
http://photo.net/photos/jimdick

BruceinFL

  • ---
  • Posts: 3009
Re: Shore Power at Home
« Reply #6 on: October 03, 2005, 10:51:38 AM »
Obviously I'm new.  My question.  Is is possible to safely connect a 50 amp RV system to a 220 VAC dryer outlet at home?  If so, is there an adapter available to make the transition?  Thanks in advance.

Fred and Nit - New RV'ers and loving it.  However today"s diesel prices may somewhat dampen out enthusiasm.

Safest bet: Get a 50 amp RV receptacle at Lowes or Home Depot (or even by mail from CW if not available where you live) and have an electrician come and hook it up where you want. That way it'll be done properly.
Bruce A.
2004 Alpenlite Valhalla 29RK 5W
2005 Ford F-350 SRW 6.0L

Jim Dick

  • Forum Staff
  • ---
  • *
  • Posts: 7675
Re: Shore Power at Home
« Reply #7 on: October 03, 2005, 02:25:58 PM »
Safest bet: Get a 50 amp RV receptacle at Lowes or Home Depot (or even by mail from CW if not available where you live) and have an electrician come and hook it up where you want. That way it'll be done properly.

Hi Bruce,

Without a doubt you are correct!!! I was just reading a note on the American Coach Yahoo Group from a guy that zapped his charger. His brother wired in 120V on both sides of a 30amp outlet!!! If in doubt, let the pro do it. At least they will be liable. ;)
Jim

Titusville, Florida
U.S. Navy Veteran
2000 American Dream 40' DP
2012 GMC Terrain
2006 Suzuki Boulevard C50T Motorcycle
http://photo.net/photos/jimdick

Tom

  • Administrator
  • ---
  • *
  • Posts: 46031
  • Celebrating 25 years of The RV Forum online.
    • RV Forum web site
Re: Shore Power at Home
« Reply #8 on: October 03, 2005, 07:04:23 PM »
...the heat element in the dryer is 220 volt (conects only to the two outer legs) but the timer, motor and control board (if any) are all powered by 110 volt.

Just for clarification, whilst that's true for domestic/home dryers, it's not true for Splendide combo washer/dryer used in the majority of RVs. They're 120V, single phase only - no provision for 220V. Check your washer/dryer owners manual and your coach's wiring diagrams. You can also check the manufacturer's web site.
[edit]Fixed link.[/edit]
« Last Edit: October 15, 2007, 12:34:00 AM by Tom »
Tom.  Need help? Click the Help button in the toolbar above.

John From Detroit

  • ---
  • Posts: 20847
  • ^My New Home^
    • Diabetics Forum
Re: Shore Power at Home
« Reply #9 on: October 03, 2005, 07:37:30 PM »
Multiple post reply:

RE: "True of home, not RV dryers"   yes, he was speaking of a home dryer outlet and so was I,  I've done considerable work on one of the old dryers in my home.  Replaced teh heat element more than once, assorted bearings and rollers, finally replaced the entire dryer.

Re: different phases, no, same phase.  It is not multi phase, it is split phase.  both legs are totaly in phase so if you label them

A(120v)B(120v)C and you measure A to B, it's 120 volt, Measure B to C it's 120 volt, Measure A to C it's 240 volt,  but the phase is the same (as cited above) if you measure A to B and C to B however then yes, the phase is backwards.

but to add they must be in phase.  Hence the label "Split phase" because a single phase is split between the two legs.  The transformer is center tapped.

And finally re: hooking A & C up to a 30 amp outlet... Very bad idea (As that one person found out) the 30 amp outlet in my back yard is a proper 120V line

Interesting fact: The generator on my RV is 120 volt only,  it can not power 240 volt gear w/o a transformer.  Why they did this I do not know unless it has a single 120 Volt winding (it has 2 30 amp breakers)
Nothing adds excitement like something that is none of your business
My Home is where I park it.

Tom

  • Administrator
  • ---
  • *
  • Posts: 46031
  • Celebrating 25 years of The RV Forum online.
    • RV Forum web site
Re: Shore Power at Home
« Reply #10 on: October 03, 2005, 07:55:28 PM »
he was speaking of a home dryer outlet and so was I

Since your message began with the quote "An RV 50 amp circuit is NOT 220V", it wasn't obvious to me that you were talking about a home dryer, which is why I figured I'd better clarify that they're different. We really don't want folks hooking up their RV dryer incorrectly. I have no doubt that you understood what you meant.

Quote
I've done considerable work on one of the old dryers in my home.

Me too. Used to do it for paying customers at one time.
« Last Edit: October 03, 2005, 08:59:18 PM by Tom »
Tom.  Need help? Click the Help button in the toolbar above.

Gary RV_Wizard

  • Forum Staff
  • ---
  • *
  • Posts: 63650
  • RVer Emeritus
Re: Shore Power at Home
« Reply #11 on: October 03, 2005, 09:05:05 PM »
While most 50A RVs only use it as a pair of 120V feeds, a standard RV 50A outlet is most definitely a 220V hook-up and some (though not many) RVs do in fact have 220V appliances, e.g. a residential-style 220V stove. 
Gary
--------------
Gary Brinck
Summers: Black Mountain, NC
Home: Ocala National Forest, FL

John From Detroit

  • ---
  • Posts: 20847
  • ^My New Home^
    • Diabetics Forum
Re: Shore Power at Home
« Reply #12 on: October 04, 2005, 12:35:52 AM »
Since your message began with the quote "An RV 50 amp circuit is NOT 220V",

Oh, good point, however wrong poster, That was someone else whom I quoted

But you did make a good point... of course some RV's are not entirely RV stock, as someone else pointed out

I do know it's a lot of fun wiring up stuff on the rig... I get to slide under it (there is enough ground clearence for 320 lb me to slide under it) and sit up, actually and work up inside the frame of the "Truck" part and so long as I'm not too close to tires, batteries, jacks and the like there is plunty of room to work

Added some daisy chain RV outlets to power other rigs in the event of power fail sould I feel kind, also to run pre-existing extension cords for use on the table should I wish to grill with electric insted of propane.  added a side view video camera, and of course had to run all the wires for all this stuff.  the side view camera lines up with the gas cap, should make re-fueling easier, much, much, easier
Nothing adds excitement like something that is none of your business
My Home is where I park it.

Tom

  • Administrator
  • ---
  • *
  • Posts: 46031
  • Celebrating 25 years of The RV Forum online.
    • RV Forum web site
Re: Shore Power at Home
« Reply #13 on: October 04, 2005, 01:24:14 AM »
I do know it's a lot of fun wiring up stuff on the rig... I get to slide under it....

Me too John, until I recently had the factory guys rewire some stuff that had been incorrectly wired when the coach was built (I'm not fixing their errors), and I witnessed this. I'm not as keen to slide (or wriggle) under the coach any more  :(
« Last Edit: October 04, 2005, 02:34:51 AM by Tom »
Tom.  Need help? Click the Help button in the toolbar above.

Tom

  • Administrator
  • ---
  • *
  • Posts: 46031
  • Celebrating 25 years of The RV Forum online.
    • RV Forum web site
Re: Shore Power at Home
« Reply #14 on: October 05, 2005, 07:51:55 AM »
This one has been bugging me for several years. I've even asked electricians, technicians and engineers and never received a straight answer. My understanding was also clouded by my background in UK power distribution systems which are quite different from those in the U.S. So I did a little research of my own.

John was right on with his explanation of split phase (a single phase supply fed by a center-tapped transformer), which applies equally to our domestic electrical service and that of 50A service at campgrounds.

Here's the wiring diagram (14-50R is the receptacle used for 50A service at a campground).

When we plug our RVs into 50A service, our appliances and a/c units are shared between the two 125V legs; Some are wired to one leg and some to the other. (Yes, some high-end coaches have 250V appliances which will be connected across the two legs, rather than between one leg and neutral).

A little light reading (no pun intended):

Wikipedia on split phase systems.

Wikipedia on applicable national electric code.
« Last Edit: April 08, 2007, 06:17:28 PM by Tom »
Tom.  Need help? Click the Help button in the toolbar above.

quasi

  • ---
  • Posts: 49
    • The Laser Dude
Re: Shore Power at Home
« Reply #15 on: October 07, 2005, 03:45:10 AM »
Fred and Nit,
Confusin', ain't it.
If you refer to the diagram provided by Tom, you'll see that your RV cord has a  NEMA 14-50 plug end. Your dryer receptacle most likely has the NEMA 14-50R receptacle. You can build (or have built) a cord adapter with the appropriate ends and it will work fine. The only thing to be aware of is that no matter how big the receptacle is, you will still be able to draw only 30 Amps from the receptacle. Any more and the breaker opens.

As to the (mistaken) belief that this is polyphase, it is single phase. The diagram shows very well how this works. Also, I've heard it stated that only a very few coaches have 220v appliances. Actually, if you have standard washer/dryer hookups installed, the dryer receptacle can be 220.

One last observation before I put away my soapbox. The diagram shows the white wire as the sys gr or system ground. Never confuse this with the grounding conductor. Even though they are connected (bonded) at the breaker panel, never, never, ever reverse or connect the two at the receptacle or in the trailer. On an unbalanced load, the white wire or neutral conductor becomes a current carrying conductor and swapping with the grounding conductor could allow dangerous voltages to be present at the trailer.
Q
Growing older is mandatory,
Growing up is entirely optional.

Remember, it's never too late to have a happy childhood.

Tom

  • Administrator
  • ---
  • *
  • Posts: 46031
  • Celebrating 25 years of The RV Forum online.
    • RV Forum web site
Re: Shore Power at Home
« Reply #16 on: October 07, 2005, 04:10:17 AM »
Thanks Quasi.

You can build (or have built) a cord adapter with the appropriate ends and it will work fine.

PPL sells a 50A extension cord with the right connectors on it. One reason I didn't suggest this is that, since a domestic dryer is 220V, the neutral conductor carries little or no current and, since I didn't know the applicable electrical code or how Fred's house is wired, I didn't know if his domestic dryer receptacle might be wired with a smaller neutral conductor. Running a bunch of 110V loads in his RV on a circuit with a small neutral wire  might cause a fire and, since he specifically asked if it was safe, I honestly couldn't answer that. Hopefully, someone who knows the electrical code can answer it.

Quote
As to the (mistaken) belief that this is polyphase, it is single phase.

Thought I said that  :)

Quote
The diagram shows the white wire as the sys gr or system ground. Never confuse this with the grounding conductor.

I was concerned about it possibly causing confusion, but opted not to confuse it further by trying to explain it. Thanks for clarifying it.
« Last Edit: October 07, 2005, 04:13:49 AM by Tom »
Tom.  Need help? Click the Help button in the toolbar above.

Fred and Nit

  • ---
  • Posts: 7
Re: Shore Power at Home
« Reply #17 on: October 08, 2005, 05:37:08 AM »
Thanks to all of you for your input.  I might be a new RV'er but I certainly know where to go for ansewers.  n a nutshell don't do it.
I'll have my electricianl install a sub-panel at the main entrance to my house (as the interior panel is nearly full).  Again, Thanks to all of you for the information.  Fred and Nit :)

quasi

  • ---
  • Posts: 49
    • The Laser Dude
Re: Shore Power at Home
« Reply #18 on: October 09, 2005, 12:51:39 AM »
Bravo.   Good answer.   The right way is always the best way.
;D

Q
Growing older is mandatory,
Growing up is entirely optional.

Remember, it's never too late to have a happy childhood.

John From Detroit

  • ---
  • Posts: 20847
  • ^My New Home^
    • Diabetics Forum
Re: Shore Power at Home
« Reply #19 on: October 09, 2005, 06:50:59 PM »
Thanks Quasi.

. One reason I didn't suggest this is that, since a domestic dryer is 220V, the neutral conductor carries little or no current and, since I didn't know the applicable electrical code or how Fred's house is wired,Thought I said that  :)

I have seen quite a few dryer instalations and every one I've seen all three lines were the same, That is, if one leg was 10 ga, then both the other leg and the neutral were 10 ga, no smaller wires.

Of course today there are 4 wires in the cable, all the same size, one is not insulated (or is in green depending on if it's stranded or solid wire.... Where do you find stranded? in the cord of course)

THIS DOES NOT MEAN THAT SOMEONE HAS NOT TAKEN A "SHORT CUT" IN WIREING A HOUSE, however

I've seen many-a-shortcut and I've not seen all that many houses... I'm having one house re-wired just now because the number of shortcuts, quite frankly, scares me and has for years... Now I can do something about it.
« Last Edit: October 09, 2005, 06:52:32 PM by John In Detroit »
Nothing adds excitement like something that is none of your business
My Home is where I park it.

Tom

  • Administrator
  • ---
  • *
  • Posts: 46031
  • Celebrating 25 years of The RV Forum online.
    • RV Forum web site
Re: Shore Power at Home
« Reply #20 on: October 09, 2005, 07:00:48 PM »
I have seen quite a few dryer instalations and every one I've seen all three lines were the same

Thanks John, I just wasn't sure. I read somewhere, but don't recall where, that it's legit to install a dryer circuit with a smaller gauge neutral wire. I'm not familiar with the relevant code, so I figured I'd better state it as a concern.
Tom.  Need help? Click the Help button in the toolbar above.

Ned

  • Former Staff
  • ---
  • Posts: 25574
  • Ned and Lorna are former full time RVers
    • Have you seen Rolling Stock?
Re: Shore Power at Home
« Reply #21 on: October 09, 2005, 07:10:24 PM »
If a dryer is working properly, there would be no current in the neutral, but if one side failed, then the neutral would carry the full current of the remaining hot side.  Common sense would say make all 3 wires the same gauge.
-- Ned -- Fulltimer 1997-2013
1997 Holiday Rambler Endeavor LE
2007 GMC Canyon

Tom

  • Administrator
  • ---
  • *
  • Posts: 46031
  • Celebrating 25 years of The RV Forum online.
    • RV Forum web site
Re: Shore Power at Home
« Reply #22 on: October 09, 2005, 07:15:51 PM »
Ned, that would make sense if the neutral was connected. IIRC the dryer element is only connected across the two hot wires. If that's true, if the element failed there would be zero current drawn by it. Assuming the controls are 110V, they're not going to draw enough current to need a large diameter neutral wire.

If this discussion keeps up, I'm going to have to dismantle my dryer and the receptacle  ;D
« Last Edit: October 09, 2005, 08:45:00 PM by Tom »
Tom.  Need help? Click the Help button in the toolbar above.

Ned

  • Former Staff
  • ---
  • Posts: 25574
  • Ned and Lorna are former full time RVers
    • Have you seen Rolling Stock?
Re: Shore Power at Home
« Reply #23 on: October 09, 2005, 08:07:20 PM »
You may be correct, I've never looked inside a dryer to see how it was wired.  Maybe we can take yours apart tomorrow :)
-- Ned -- Fulltimer 1997-2013
1997 Holiday Rambler Endeavor LE
2007 GMC Canyon

Tom

  • Administrator
  • ---
  • *
  • Posts: 46031
  • Celebrating 25 years of The RV Forum online.
    • RV Forum web site
Re: Shore Power at Home
« Reply #24 on: October 09, 2005, 08:42:42 PM »
Maybe we can take yours apart tomorrow

Only if you know how to put it back together. I'll need to see your contractors license and your insurance  ;D
Tom.  Need help? Click the Help button in the toolbar above.

Ned

  • Former Staff
  • ---
  • Posts: 25574
  • Ned and Lorna are former full time RVers
    • Have you seen Rolling Stock?
Re: Shore Power at Home
« Reply #25 on: October 09, 2005, 10:32:40 PM »
Hey, it was your idea :)
-- Ned -- Fulltimer 1997-2013
1997 Holiday Rambler Endeavor LE
2007 GMC Canyon

Tom

  • Administrator
  • ---
  • *
  • Posts: 46031
  • Celebrating 25 years of The RV Forum online.
    • RV Forum web site
Re: Shore Power at Home
« Reply #26 on: October 09, 2005, 10:44:46 PM »
OK, you bring the flashlight and I'll find a screwdriver (the metal kind).
Tom.  Need help? Click the Help button in the toolbar above.

John From Detroit

  • ---
  • Posts: 20847
  • ^My New Home^
    • Diabetics Forum
Re: Shore Power at Home
« Reply #27 on: October 09, 2005, 10:53:34 PM »
Ned, that would make sense if the neutral was connected. IIRC the dryer element is only connected across the two hot wires. If that's true, if the element failed there would be zero current drawn by it. Assuming the controls are 110V, they're not going to draw enough current to need a large diameter neutral wire.

If this discussion keeps up, I'm going to have to dismantle my dryer and the receptacle  ;D

You forget that there are motors in that dryer, and in home dryers those motors are generally 120 volt motors (there are at least 2) there may also be lightbulbs and the like, also 120 volt.

Also, the failure of the dryer element may be an open, or it may be a "short to ground" and if that is the case you want that nuteral wire (and/or the safety ground) to be able to take everything the hot wires can give it cause a blown breaker/fuse is the only thing between you and "Dearly beloved we are gatered here today to remember our dearly departed friend ____(your name here)____"
Nothing adds excitement like something that is none of your business
My Home is where I park it.

Tom

  • Administrator
  • ---
  • *
  • Posts: 46031
  • Celebrating 25 years of The RV Forum online.
    • RV Forum web site
Re: Shore Power at Home
« Reply #28 on: October 09, 2005, 11:18:11 PM »
You forget that there are motors in that dryer

Actually, I didn't forget. The heating element is by far the largest current draw in a dryer.

Quote
Also, the failure of the dryer element may be an open, or it may be a "short to ground" and if that is the case you want that nuteral wire (and/or the safety ground) to be able to take everything the hot wires can give it

If it's a short to ground, it's going to flow in the ground wire and it won't flow for long before something trips.

I'll let you give Ned CPR if I'm wrong.
Tom.  Need help? Click the Help button in the toolbar above.

Ned

  • Former Staff
  • ---
  • Posts: 25574
  • Ned and Lorna are former full time RVers
    • Have you seen Rolling Stock?
Re: Shore Power at Home
« Reply #29 on: October 10, 2005, 09:27:30 AM »
On second thought, maybe the manual has a schematic.
-- Ned -- Fulltimer 1997-2013
1997 Holiday Rambler Endeavor LE
2007 GMC Canyon

Tom

  • Administrator
  • ---
  • *
  • Posts: 46031
  • Celebrating 25 years of The RV Forum online.
    • RV Forum web site
Re: Shore Power at Home
« Reply #30 on: October 10, 2005, 09:49:17 AM »
You know I don't do manuals  ;D
Tom.  Need help? Click the Help button in the toolbar above.

Lou Schneider

  • Forum Staff
  • ---
  • *
  • Posts: 8180
Re: Shore Power at Home
« Reply #31 on: October 10, 2005, 12:33:08 PM »
Quote
If it's a short to ground, it's going to flow in the ground wire and it won't flow for long before something trips
Not necessarily.  If the heating element opens near it's center (the zero voltage point) and one of the broken ends touches one of the dryer's grounded metal parts you will have the element's full rated current or even a bit more flowing in the ground wire.  The breaker won't trip unless the resistance is low enough to draw excessive current, and the only operating symptom will be less than normal heat from the dryer as only half of it's heating element is energized - from one hot leg to the ground short.
« Last Edit: October 10, 2005, 12:36:26 PM by Lou »

Tom

  • Administrator
  • ---
  • *
  • Posts: 46031
  • Celebrating 25 years of The RV Forum online.
    • RV Forum web site
Re: Shore Power at Home
« Reply #32 on: October 10, 2005, 12:54:00 PM »
Understood Lou. But, in your scenario, there's still no contribution to the current in the neutral wire from the heating element, which is the point I was trying to make.
Tom.  Need help? Click the Help button in the toolbar above.

John From Detroit

  • ---
  • Posts: 20847
  • ^My New Home^
    • Diabetics Forum
Re: Shore Power at Home
« Reply #33 on: October 10, 2005, 04:01:14 PM »
Actually, I didn't forget. The heating element is by far the largest current draw in a dryer.

If it's a short to ground, it's going to flow in the ground wire and it won't flow for long before something trips.

I'll let you give Ned CPR if I'm wrong.

I do agree the heating element is the biggest load... My point however is this... Should it short to ground, if you have "skimped" on the ground & Nuteral wirew it is not so much the shock danger, but the fact that if the wire is too small and too long the breaker may well not blow, the wire may well become the heat element and then the song you will be singing is "Burning down the house"
Nothing adds excitement like something that is none of your business
My Home is where I park it.

Tom

  • Administrator
  • ---
  • *
  • Posts: 46031
  • Celebrating 25 years of The RV Forum online.
    • RV Forum web site
Re: Shore Power at Home
« Reply #34 on: October 10, 2005, 04:22:03 PM »
No disagreement John, but I've not mentioned a smaller ground wire anywhere in the discussion. I merely related to something I'd read about dryer receptacles being installed with a smaller neutral wire, which is why I raised the flag about assuming it was "safe" to plug an RV into a dryer receptacle. Your prior message confirmed that you haven't seen any installations with a smaller neutral wire and, in those cases, there shouldn't be a problem.

No, I haven't (yet) dismantled my dryer receptacle at home to find out what size wire they used  ;D  Wish I could recall where I read that comment.
Tom.  Need help? Click the Help button in the toolbar above.