RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > RV SYSTEMS AND TECHNOLOGIES FORUMS > RV Systems & Appliances
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 11-05-2015, 10:22 AM   #1
Dad
Member
 
Dad's Avatar
 
Monaco Owners Club
Join Date: Jul 2015
Location: Cincinnati
Posts: 67
Plug 50amp in to dryer outlet

http://www.myrv.us/Imgs/PDF/50-amp%20Service.pdf

Have a 2001 Monaco Dip. 50amp plug 4 prong. See above pdf. When I look at my dryer outlet it matches up to this pdf. We have used a volt meter to check for polarity. But every time I use the words "Dryer outlet" people in the RV world freak out. I have no idea my my dryer out let has the 4 wire plug, it is a new house so I guess that is what they are putting in.

So what is bad about using it to plug in when it match's up to this (how to install a 50amp guide)?
__________________
2001 Monaco Diplomat
350 Cummings
Allison Transmission
Dad is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 11-05-2015, 10:26 AM   #2
Senior Member
 
Join Date: Sep 2012
Posts: 4,232
If the wiring, voltages, and amps match, it's fine.

Usually the issue with "dryer" or "welding" outlets is when you plug in 30A RVs.
jesilvas is offline   Reply With Quote
Old 11-05-2015, 10:30 AM   #3
Senior Member
 
aauummm's Avatar
 
Join Date: Oct 2013
Location: Altoona, Iowa
Posts: 1,668
Quote:
Originally Posted by Dad View Post
http://www.myrv.us/Imgs/PDF/50-amp%20Service.pdf

Have a 2001 Monaco Dip. 50amp plug 4 prong. See above pdf. When I look at my dryer outlet it matches up to this pdf. We have used a volt meter to check for polarity. But every time I use the words "Dryer outlet" people in the RV world freak out. I have no idea my my dryer out let has the 4 wire plug, it is a new house so I guess that is what they are putting in.

So what is bad about using it to plug in when it match's up to this (how to install a 50amp guide)?
Whoa.....I'd wait for some of our electrical experts to chime in here before proceeding!
__________________
2010 Itasca Sunova 33C, (lots of upgrades and modifications)
2011 Honda CRV, 2004 Rubicon (many modifications)
[SIGPIC][/SIGPIC]
aauummm is offline   Reply With Quote
Old 11-05-2015, 10:37 AM   #4
Senior Member
 
Steve Ownby's Avatar
 
Join Date: Nov 2008
Location: Cosby, Tn
Posts: 6,587
Quote:
Originally Posted by Dad View Post
http://www.myrv.us/Imgs/PDF/50-amp%20Service.pdf

Have a 2001 Monaco Dip. 50amp plug 4 prong. See above pdf. When I look at my dryer outlet it matches up to this pdf. We have used a volt meter to check for polarity. But every time I use the words "Dryer outlet" people in the RV world freak out. I have no idea my my dryer out let has the 4 wire plug, it is a new house so I guess that is what they are putting in.

So what is bad about using it to plug in when it match's up to this (how to install a 50amp guide)?

Older dryer outlets were 3 prong. The angled prongs were both hot and the round bottom prong was the neutral. The 30 amp RV outlet looks much like this old dryer outlet but is wired with one hot and one neutral with the bottom round prong a ground only. If the 4 prong outlet you are referring to measures as follows, it's ok to use:
1. 120 vac from each hot to neutral.
2. 120 vac from each hot to ground.
3. 240 vac from hot to hot.
4. Zero vac from neutral to ground.



Steve Ownby
Full time since '07
__________________
Steve Ownby
Full time since 2007
2003 Monaco Signature
Steve Ownby is offline   Reply With Quote
Old 11-06-2015, 09:04 AM   #5
paz
Senior Member
 
paz's Avatar
 
Join Date: May 2005
Location: Full-timers - Home is where we park it.
Posts: 4,717
Be very careful using any plug that was wired for use with a dryer. A 3-prong dryer plug looks a lot like the 3-prong, 30-amp plug on RVs. The problem is most dryers are 240V, and most dryer receptacles are wired accordingly. 240V will fry the electricals in your RV, and that's why everyone freaks out when you mention "dryer plug."

If your dryer plug indeed has 4 prongs, check it out according to Steve's description before trying to use it.
paz is offline   Reply With Quote
Old 11-06-2015, 10:24 AM   #6
Senior Member
 
andy29847's Avatar
 
Join Date: Oct 2013
Posts: 656
The dryer plug is probably a NEMA 14-30R, the RV plug is probably a NEMA 14-50r - they are wired the same but the ends don't match.

andy29847 is offline   Reply With Quote
Old 11-06-2015, 01:36 PM   #7
Senior Member
 
BatteryPro's Avatar
 
Join Date: Jan 2015
Posts: 344
The Truth About 240 Volts and Your RV

Quote:
Originally Posted by paz View Post
...240V will fry the electricals in your RV, and that's why everyone freaks out when you mention "dryer plug.”....
The only way you can “fry the electricals” is if someone has miswired the RV or the receptacle you plug into. All 50 amp RV plugs are 240 volt split phase. 240 volts does not harm your RV. In your AC breaker panel, the 240 volts is split into two discrete 120 volt circuits by using one hot leg and the neutral. Some all electric coaches use the 240 volts for cooktops.

Electric dryer plugs come in 4 styles. See photo. All are 240 volts. Some use 3-wire, some use 4-wire. One of the 4-wire plugs (top right) is identical to a RV 50 amp plug. That type of receptacle can be used safely.

The other 3 dryer plugs do not match any RV plug so there is no way to plug your RV into one of the other receptacles. If someone has modified your RV cord, all bets are off!

Larry
Attached Thumbnails
Click image for larger version

Name:	Screen Shot 2015-11-06 at 9.17.12 AM.png
Views:	213
Size:	317.5 KB
ID:	111289  
__________________
I have a vast knowledge about PV solar, batteries and inverters. I'll try to provide the best answer if I know it and hopefully correct some "Campfire" talk. Full-time 1999-2004. Part time now. '92 Hawkins, 360AH Lithium Battery, 1480 Watts PV solar.
BatteryPro is offline   Reply With Quote
Old 11-06-2015, 01:55 PM   #8
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,023
The problem with everybody "Freaking out" is we are used to seeing folks wanting to plug a 30 amp RV into a welder or dryer outlet, Some of which are capable of accepting the plug, but alas, you should not do this, As it's dangerous and they will damage THEIR Rvs.. Please note I'm talking about THEM, not you.

In your case. Yes there may be a danger.. However I suspect odds are slight.

Just to be safe you shoudl trip the breakers (TURN OFF) feeding that outlet then inspect the wires.. Are the black, read,a nd white wires the same size? IF so no danger. If the white wire is smaller (possible but I do NOT think that is code) There is a fire hazard,, but so long as they are the same size. No problem.

The Green/bare wire can be smaller, also no problem.
__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 11-06-2015, 02:10 PM   #9
Senior Member
 
MattC's Avatar
 
Join Date: Feb 2012
Location: SE Michigan
Posts: 459
Quote:
Originally Posted by Dad View Post
http://www.myrv.us/Imgs/PDF/50-amp%20Service.pdf

Have a 2001 Monaco Dip. 50amp plug 4 prong. See above pdf. When I look at my dryer outlet it matches up to this pdf. We have used a volt meter to check for polarity. But every time I use the words "Dryer outlet" people in the RV world freak out. I have no idea my my dryer out let has the 4 wire plug, it is a new house so I guess that is what they are putting in.

So what is bad about using it to plug in when it match's up to this (how to install a 50amp guide)?
You have checked the outlet, so I really don't understand the problem.

If the plug fits, Use it.... (If it is a 14-50, Three flat blades the same way and a round ground pin, that is what it is.)

I plug my coach into the "Welder" outlet according the panel. And, according to the USGC, I am an expert. I am a licensed ships engineer and was and industrial electrician at one time.

Matt
__________________
A lifelong waterman and his bride going dry places for as long as the fuel money lasts.
MattC is offline   Reply With Quote
Old 11-06-2015, 02:11 PM   #10
Senior Member
 
CapuTech's Avatar
 
Newmar Owners Club
Freightliner Owners Club
Join Date: Apr 2013
Location: League City, TX
Posts: 183
Quote:
Originally Posted by BatteryPro View Post
The only way you can “fry the electricals” is if someone has miswired the RV or the receptacle you plug into. All 50 amp RV plugs are 240 volt split phase. 240 volts does not harm your RV. In your AC breaker panel, the 240 volts is split into two discrete 120 volt circuits by using one hot leg and the neutral. Some all electric coaches use the 240 volts for cooktops.

Electric dryer plugs come in 4 styles. See photo. All are 240 volts. Some use 3-wire, some use 4-wire. One of the 4-wire plugs (top right) is identical to a RV 50 amp plug. That type of receptacle can be used safely.

The other 3 dryer plugs do not match any RV plug so there is no way to plug your RV into one of the other receptacles. If someone has modified your RV cord, all bets are off!

Larry
x2. Exactly right. Those freaking out don't know what they don't know (yet somehow have tremendous confidence in giving wrong advice). The pdf you linked explains it well.

I have three engineering degrees - one of which is in electrical engineering if that helps qualify the advice.
__________________
The Engel Family
2015 Dutch Star 4312, 2015 Ford Explorer Sport with AF1
CapuTech is offline   Reply With Quote
Old 11-07-2015, 12:21 AM   #11
Senior Member
 
cochise1949's Avatar
 
Winnebago Owners Club
Ford Super Duty Owner
Join Date: Aug 2013
Location: Lake Elsinore, CA
Posts: 230
When we had an electrician install a 50amp outlet in our driveway, he saw that we had an unused dryer circuit, having gone to a gas dryer. Made his job easier (so he said) as well as the hit on my wallet. He split that 240v into 2 120v legs for the RV. Worked well.


Sent from my iPad using iRV2 - RV Forum
__________________
Bev& Keith
Kyriana(14)Aidan(11), Emily and Olivia (2) Grandchildren
2014 Winnebago Adventurer 38Q
2013 Honda CRV, Roadmaster Falcon AT, Invisibrake
cochise1949 is offline   Reply With Quote
Old 11-07-2015, 07:46 AM   #12
Senior Member
 
Join Date: Oct 2015
Location: Brighton, MI
Posts: 766
Quote:
Originally Posted by cochise1949 View Post
When we had an electrician install a 50amp outlet in our driveway, he saw that we had an unused dryer circuit, having gone to a gas dryer. Made his job easier (so he said) as well as the hit on my wallet. He split that 240v into 2 120v legs for the RV. Worked well.


Sent from my iPad using iRV2 - RV Forum
2 120v legs, 180* out of phase is 240v. Your dryer outlet was always 2 120v legs. He really didn't do anything but maybe replace the wire with longer wire and put the outlet on the end.
70ChevelleSS is offline   Reply With Quote
Old 11-07-2015, 08:06 AM   #13
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,023
I will say again, Those freaking out do not read well.

Many Dryer outlets are 3-wire 240 volt.. And many of them can accept a TT-30 plug.. You plug an RV into one of these, bad things happen.

We are very used to reading of those bad things when someone does just that..

But that is not the case in the Original Poster's post.

Still people fail to properly read that it is a modern FOUR WIRE outlet, not a 3 wire from the sixties and thus they freak out. I read (And several others here it seems) read the full post.. Still others did not,

Best advice: Plug in something like a Progressive Industries PT-50C or better yet put an HW-50C in your RV.. IF it approves.. you are generally good.

But as I said before I'd check the outlet to make sure the neutral is the same size as the hot wires.. Just to be safe.
__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 11-07-2015, 08:22 AM   #14
paz
Senior Member
 
paz's Avatar
 
Join Date: May 2005
Location: Full-timers - Home is where we park it.
Posts: 4,717
Quote:
Originally Posted by BatteryPro View Post
The only way you can “fry the electricals” is if someone has miswired the RV or the receptacle you plug into...
Larry
That's one of the points I was trying to make. OP stated his "dryer plug" matches the link in his post, which shows a 14-50R RV receptacle. If it was indeed being used for a dryer, it was very likely mis-wired.

The other point I was trying to make is the reason many people "freak out" when you mention a dryer receptacle is most people know dryer receptacles are usually wired for 240V. As you so aptly point out, however, even though the plugs look similar, they won't fit.
paz is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can you plug a 50 amp RV cord into a 4 prong appliance plug? Jeff753 RV Systems & Appliances 33 10-17-2015 12:19 PM
Problems getting Onan coolant systemdrain plug out PanJH Newmar Owner's Forum 5 09-20-2015 07:21 AM
Replacing filter on Haldex air dryer wagonmaster2 Winnebago Industries Owner's Forum 1 04-10-2014 10:51 AM
50 amp plug tbbg II Newmar Owner's Forum 7 07-10-2013 08:10 PM


All times are GMT -6. The time now is 10:00 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.