Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-07-2018, 09:26 AM   #1
meandher
 
2019 30' Classic
Miami , Florida
Join Date: Oct 2017
Posts: 74
Question need help with electrical questions

i am buying a 2019 classic 30 ft twin this year, i need to prepare a concrete slab and cover for it next to my cabin.
i want to get an electrical outlet there as well
do i need 240 volt for an 50 amp outlet or can i use 120?
the only thing i know about electricity is to flip a switch
Docv is offline   Reply With Quote
Old 04-07-2018, 09:41 AM   #2
Rivet Master
 
paiceman's Avatar
 
2020 28' Flying Cloud
Upper St Clair , Pennsylvania
Join Date: Aug 2011
Posts: 2,926
Images: 1
120-50amp. I had one put in by licensed electrician, despite being told several times he wired it up like an electric dryer. Plugged in, blew converter and blue ray. He paid for all
__________________
Bud

2020 28' Twin Flying Cloud-(Our 5th Airstream)

USAF Master Training Instructor (TI) - 68-72
paiceman is offline   Reply With Quote
Old 04-07-2018, 10:53 AM   #3
Rivet Master
 
Mollysdad's Avatar

 
2017 26' Flying Cloud
Tampa , Florida
Join Date: Feb 2017
Posts: 5,578
Blog Entries: 1
Well, at the cabin end it's the same wiring for both.
At the RV end the two hots are not used as a pair, so you end up with (2) 120v. circuits.

Quote:
Originally Posted by paiceman View Post
120-50amp. I had one put in by licensed electrician, despite being told several times he wired it up like an electric dryer. Plugged in, blew converter and blue ray. He paid for all
I'm not a licensed electrician, but I can't understand what he did. A 240 v. dryer plug is not the same as a 120 v. RV plug.
So perhaps he took a RV female 30 amp plug and wired it as IF it were a 240 v. dryer plug with hot, hot, ground/neutral.
(In a dryer plug the ground is an angled spade, in the RV the ground is a pin.)
Mollysdad is offline   Reply With Quote
Old 04-07-2018, 11:12 AM   #4
Rivet Master
 
Al and Missy's Avatar
 
2002 30' Classic S/O
Fleming Island , Florida
Join Date: Nov 2013
Posts: 4,175
A dryer receptacle has three contacts, the RV has four. RV 50A service is the same as 240V, just also has the neutral (white wire). Hot 1 - Black, Hot 2 - Red, Neutral - White, and Ground - Green. Airstreams only use the service as two separate 120V circuits, Hot 1 to Neutral and Hot 2 to neutral. Some RVs, particularly large Class A's with residential appliances like dryers and ranges use Hot 1 to Hot 2 which gives 240V. If you have the 4-contact receptacle wired correctly your Airstream will get two 120V 50A circuits just as intended.

Al
__________________
“You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO WBCCI 1322
2002 Classic 30 Slideout -S/OS #004
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
Al and Missy is offline   Reply With Quote
Old 04-07-2018, 01:27 PM   #5
1 Rivet Member
 
2017 16' Sport
loves park , Illinois
Join Date: Jan 2017
Posts: 15
Outlet

HI, i have a 50 amp outlet that is in a metal weather proof outdoor box and very high end that i bought last year ,but decided not to have it installed. it is yours if you would like it, going to waste , new in the box approx $80 retail, just email me with your shipping info cmadison@napleton.com

Charles
chasrolex69 is offline   Reply With Quote
Old 04-07-2018, 01:56 PM   #6
meandher
 
2019 30' Classic
Miami , Florida
Join Date: Oct 2017
Posts: 74
Quote:
Originally Posted by chasrolex69 View Post
HI, i have a 50 amp outlet that is in a metal weather proof outdoor box and very high end that i bought last year ,but decided not to have it installed. it is yours if you would like it, going to waste , new in the box approx $80 retail, just email me with your shipping info cmadison@napleton.com

Charles
i will take it
Erik van Ginkel 6281 coral lake drive miami fl 33155
thanks
Docv is offline   Reply With Quote
Old 04-07-2018, 02:20 PM   #7
1 Rivet Member
 
2017 16' Sport
loves park , Illinois
Join Date: Jan 2017
Posts: 15
outlet

On its way to you first thing Monday morn. enjoy your Airstream!
chasrolex69 is offline   Reply With Quote
Old 04-07-2018, 02:24 PM   #8
4 Rivet Member
 
dasams's Avatar
 
Palm Desert , California
Join Date: Jul 2016
Posts: 301
Quote:
Originally Posted by Docv View Post
do i need 240 volt for an 50 amp outlet or can i use 120?
Just to clarify, an AS with 50 amp service has the ability to pull up to 100 amps. At the pedestal, the 50 amps are at 240 volts. The phases are separated in the four prong plug and pass through the cable in separate wires. Hence you'll have 2 x 50 amps. Look in your breaker panel and you'll see two 50 amp breakers.

You can install a 50 amp 120V plug and it'll function normally. Just be aware that you may trip the breaker if both AC's are running and you turn on the microwave while your wife is blow drying her hair

If you go the 120V route, you'll need a dogbone with a 50 amp three prong male to 50 amp four prong female. I've never seen one but the 30 amp > 50 amp dogbanes are common. See https://www.amazon.com/Camco-Dogbone...amp+rv+adapter

If your site is mainly for storage and can get by with 30 amps, then have your electrical install a 30 amp plug and use the 30 > 50 amp dogbone. But you can use only one AC at a time.
__________________
2006 Cayenne S with V8, air suspension, factory tow
2018 FC 27 FB
2017 FC 25 RB Gone
dasams is offline   Reply With Quote
Old 04-07-2018, 02:49 PM   #9
Rivet Master
 
Al and Missy's Avatar
 
2002 30' Classic S/O
Fleming Island , Florida
Join Date: Nov 2013
Posts: 4,175
Quote:
Originally Posted by dasams View Post
Just to clarify, an AS with 50 amp service has the ability to pull up to 100 amps. At the pedestal, the 50 amps are at 240 volts. The phases are separated in the four prong plug and pass through the Monster cable in separate wires. Hence you'll have 2 x 50 amps. Look in your breaker panel and you'll see two 50 am breakers.

You can install a 50 amp 120V plug and it'll function normally. Just be aware that you may trip the breaker if both AC's are running and you turn on the microwave while your wife is blow drying her hair

If you go the 120V route, you'll need a dogbone with a 50 amp three prong male to 50 amp four prong female. I've never seen one but the 30 amp > 50 amp are common. See https://www.amazon.com/Camco-Dogbone...amp+rv+adapter
From an Airstream's perspective, both 30 amp and 50 amp are 120 volts. If OP's trailer has 50A wiring, he should install a 50A service, but be sure that it is wired for an RV: 2 hot lines, one neutral, one ground - not a dryer hookup which doesn't have the neutral. "50A service" for RV's is really 100A service, i.e. 2 separate 50A 120V services. Only one neutral is required because the two 120V legs are 180 degrees out of phase. The neutral only carries the difference in the current between the two 120V hot wires.

If Op's trailer has 30A service, he could get by with a 30A service, but I'd still recommend he install 50A service for upgrade potential. The 50A 240V RV service will cost a little more than the 30A since it is larger wire and 4 wires instead of three, but it should be mostly material costs. The electrician doesn't do substantially more to run a 4-wire cable that he would do to run a 3-wire cable.

As to the dogbone, while OP might be able to find a 120V 50A connector, it is not going to be an RV style and there probably is not a dogbone to translate it to a 50 RV connector. Plus, 50 A at 120V only gives you a total of 50A, not 100 like the standard 50A service.

Bite the bullet and put in a 120/240 4-wire 50A service and you'll be good to go.

Al
__________________
“You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO WBCCI 1322
2002 Classic 30 Slideout -S/OS #004
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
Al and Missy is offline   Reply With Quote
Old 04-07-2018, 03:08 PM   #10
Rivet Master
 
paiceman's Avatar
 
2020 28' Flying Cloud
Upper St Clair , Pennsylvania
Join Date: Aug 2011
Posts: 2,926
Images: 1
Quote:
Originally Posted by Mollysdad View Post
Well, at the cabin end it's the same wiring for both.
At the RV end the two hots are not used as a pair, so you end up with (2) 120v. circuits.

I'm not a licensed electrician, but I can't understand what he did. A 240 v. dryer plug is not the same as a 120 v. RV plug.
So perhaps he took a RV female 30 amp plug and wired it as IF it were a 240 v. dryer plug with hot, hot, ground/neutral.
(In a dryer plug the ground is an angled spade, in the RV the ground is a pin.)


That’s what he did
__________________
Bud

2020 28' Twin Flying Cloud-(Our 5th Airstream)

USAF Master Training Instructor (TI) - 68-72
paiceman is offline   Reply With Quote
Old 04-08-2018, 02:12 PM   #11
Obviously-NOT
 
james.mileur's Avatar
 
2017 30' Classic
Kalispell , Montana
Join Date: Nov 2016
Posts: 862
This is a good description.
Attached Files
File Type: pdf 50-amp Service.pdf (53.9 KB, 30 views)
__________________
James Mileur, HY80-2-Al,
2017 Classic Twin, 2016 RAM 3500 Megacab, ProPride hitch
james.mileur is offline   Reply With Quote
Old 04-08-2018, 03:29 PM   #12
Rivet Master
 
TG Twinkie's Avatar
 
1974 Argosy 26
Morrill , Nebraska
Join Date: Nov 2009
Posts: 6,008
Images: 2
Blog Entries: 5
Modern dryers have a 4 wire plug and receptacle.
L1, L2, Neutral, and ground
The only part of a dryer that uses 240 volts is the heating element. The control system and drum motor are 120 volt.
Older dryers with 3 prong plugs do have a neutral. It is tied in with the ground.
In most cases the 2nd AC is the only thing that is powered ny the second 120 volt leg.
TG Twinkie is offline   Reply With Quote
Old 04-08-2018, 07:20 PM   #13
Rivet Master

 
2007 22' International CCD
Corona , California
Join Date: Jul 2013
Posts: 8,724
And because he “knows what he is doing,” he didn’t bother looking at the box for the wiring diagram that makes it clear it’s a single pole 30 amp hot circuit with neutral and ground...
__________________
Rich, KE4GNK/AE, Overkill Engineering Dept.
'The Silver HamShack' ('07 International 22FB CCD 75th Anniversary)
Multiple Yaesu Ham Radios inside and many antennae sprouting from roof, ProPride hitch, Prodigy P2 controller.
2012 shortbed CrewMax 4x4 Toyota Tacoma TV with more antennae on it.
rmkrum is offline   Reply With Quote
Old 04-09-2018, 09:08 AM   #14
Rivet Master
 
gklott's Avatar

 
2004 30' Classic
Johnson City , Texas
Join Date: Jun 2003
Posts: 588
Images: 86
Quote:
Originally Posted by Docv View Post
do i need 240 volt for an 50 amp outlet or can i use 120? the only thing i know about electricity is to flip a switch
Recommend hiring a licensed electrician to look at your trailer and then decide what you need. Recommend matching your trailer's service configuration.

Refer your electrician to NEC Handbook Figure 551.46(C)(1), which shows the three types of receptacles permitted to supply your trailer.

73/gus
__________________
Gus - KR4K : Mary - K5MCL
2004 30ft. Classic
2017 Infiniti QX80 Limited
ProPride 3P/Prodigy P3
gklott is offline   Reply With Quote
Old 04-09-2018, 11:16 AM   #15
4 Rivet Member
 
dasams's Avatar
 
Palm Desert , California
Join Date: Jul 2016
Posts: 301
Quote:
Originally Posted by TG Twinkie View Post
In most cases the 2nd AC is the only thing that is powered ny the second 120 volt leg.
We have a 2018 27' FC and the loads are split between the two legs. We can see this by monitoring the current on my EMS surge protector. Also, I'm not sure I'm reading the wiring diagram correctly but it looks like the water heater, front AC, bath, refer and dining are on one circuit and the rear AC, micro, bedroom and inverter are on the other.
__________________
2006 Cayenne S with V8, air suspension, factory tow
2018 FC 27 FB
2017 FC 25 RB Gone
dasams is offline   Reply With Quote
Old 04-10-2018, 06:12 AM   #16
4 Rivet Member
 
2018 30' Classic
Callao , Virginia
Join Date: Jul 2017
Posts: 331
We have a 2018 Classic 30' and I put in a 30 amp plug so we could get the frig running prior to taking a trip and for heat and AC (only one at a time) if needed. It works out great unless you want to test your systems capacity or do some troubleshooting with all system running then you will be missing the 50 amp. Having said that I would go with the 50 amp if you can as previously stated by Al and Missy. Also when doing your walkthrough at the dealer make sure you turn everything on at the same time to make sure it will work with a full load. Good Luck!
Airhead2018 is offline   Reply With Quote
Old 04-10-2018, 08:35 AM   #17
4 Rivet Member
 
dasams's Avatar
 
Palm Desert , California
Join Date: Jul 2016
Posts: 301
Quote:
Originally Posted by Airhead2018 View Post
Also when doing your walkthrough at the dealer make sure you turn everything on at the same time to make sure it will work with a full load. Good Luck!
When we did our walk thru, the AS was connected to a household 20 amp extension cord so no way to check everything at once LOL
__________________
2006 Cayenne S with V8, air suspension, factory tow
2018 FC 27 FB
2017 FC 25 RB Gone
dasams is offline   Reply With Quote
Old 05-13-2018, 07:21 PM   #18
Half a Rivet Short
 
2017 30' Classic
Carlisle , Pennsylvania
Join Date: May 2017
Posts: 9,296
Hi

IF you are wiring up a 50A (and not a 30A ) plug, it MUST be wired as 240V between the two "hot" lugs. The AS may not give a hoot about the 240V, but the CABLE and the Connector very much do care. You have 4 lugs on the plug, and 4 wires in the cable:

One is a ground and it should never have current on it

Two are hot leads

One is a return lead

The gotcha here is that you have two hots and one return. If both hot wires are in phase ( = no voltage between the hots, both read 120V to ground) the current in the return is in phase as well. If you get 50 + 50 in, then you get 100A through the return 50A connector pin and the return 50A wire in the cable.

If the two hot pins are out of phase you get 240V between the two hot leads. Each hot reads 120V to ground. Since they are 180 out of phase, when you run 50 + 50 in, you get zero through the return ( the currents cancel ).

One way *might* work if you never really pull any power. The other way *does* work and works under all combinations.

The point is that the 50A is really a 100A circuit if you are a 120V user. To be correct it needs to be wired to handle that full 100A.

Bob
uncle_bob is offline   Reply With Quote
Old 05-15-2018, 05:06 AM   #19
4 Rivet Member
 
2018 30' Classic
Callao , Virginia
Join Date: Jul 2017
Posts: 331
Quote:
Originally Posted by dasams View Post
When we did our walk thru, the AS was connected to a household 20 amp extension cord so no way to check everything at once LOL
Good Grief, another qualified Airstream dealer. lol
Airhead2018 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
Electrical probs w electrical to new fridge cooling unit. Surfairstrea Batteries, Univolts, Converters & Inverters 2 05-23-2012 07:24 PM
Brakes and electrical questions. Need help! L'air 1960 1960 - 1964 Overlander 3 05-01-2011 08:12 PM
Questions, Questions, Questions LowellN Repairing/Replacing Floor &/or Frame 5 10-28-2004 07:23 PM
Help! Bubble Electrical Questions 58BUBBLE Electrical - Systems, Generators, Batteries & Solar 3 08-27-2004 12:49 PM
IVOLT?electrical questions. Please help! chasgould Electrical - Systems, Generators, Batteries & Solar 4 12-04-2003 06:01 AM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 04:59 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.