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 01-02-2015, 09:41 AM   #1
Senior Member
 
Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 1,029
50 amp coach to 30 amp extension to 50 amp house?

I need an additional six feet of 50 amp extension cord to plug my RV in at the house. Can I temporarily plug my 50 amp coach into a 30 amp extension cord with a pigtail and then pigtail again to the 50 amp house circuit?

The house circuit was wired correctly as I have used it before for my previous RV which was shorter in length, but upon initial connection with the above configuration, the Surge Guard controller light "Caution when illuminated" is on.

Perhaps there's a wiring problem with the 30 amp extension cord? I have never really had a need to use it until now. It was included with my old RV.
__________________

abarkl 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 01-02-2015, 09:46 AM   #2
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 16,047
The only issue is the amount of power you plan to use in the RV. The 30 amp cable will be overloaded if you start turning a lot of things on.
For minimum use, battery charging & furnace you'll be fine. If you try to run two air conditioners , you'll have trouble.
Depending on the surge guard the " caution when illuminated " warning may be due to the guard seeing the exact same volts on both legs, instead of a slight difference in supply volts.
Do you have the guard manual?
__________________

__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 01-02-2015, 09:51 AM   #3
Senior Member
 
Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 1,029
Thanks. i only plan to use it as a 'winter time maintenance circuit'.
I understand the limited current draw using the 30 amp extension cord and pigtail.
I'm concerned about the Surge Guard "Caution when illuminated" light that's on. Perhaps I should call them.
abarkl is offline   Reply With Quote
Old 01-02-2015, 10:03 AM   #4
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 16,047
Depending on the guard, seeing the same volts ; that happens through the adaptors ; could be the cause. If the fault description, isn't in your users manual , a call is in order.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 01-02-2015, 10:03 AM   #5
Senior Member
 
Steve Ownby's Avatar
 
Join Date: Nov 2008
Location: Cosby, Tn
Posts: 6,484
Quote:
Originally Posted by abarkl View Post
Thanks. i only plan to use it as a 'winter time maintenance circuit'.
I understand the limited current draw using the 30 amp extension cord and pigtail.
I'm concerned about the Surge Guard "Caution when illuminated" light that's on. Perhaps I should call them.

It may just be a warning because both sides of the 120 circuit are on the same phase and its assuming 30 amp. If it were me, I would make up my own 10-12 foot extension cord with 6/3 plus ground wire with the standard 50 amp male and female on the ends.


Steve Ownby
Full time since '07
__________________
Steve Ownby
Full time since 2007
2003 Monaco Signature
Steve Ownby is offline   Reply With Quote
Old 01-02-2015, 10:04 AM   #6
Senior Member
 
Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 1,029
TRC's tech support says that as long as there's AC service inside the coach it's not a problem that the light is illuminated. The Surge Guard will not allow service if there's a wiring problem.
So the "caution when illuminated" light could possibly be the 25' of 50 amp cord and another 25' of 30 amp cord or a problem with one of the pigtails.
abarkl is offline   Reply With Quote
Old 01-02-2015, 10:05 AM   #7
Senior Member
 
Join Date: Aug 2010
Posts: 455
Go to Camping World in Mesa or Avondale and get a 50 amp extension cord (they have a couple different lengths), problem solved! . . . assuming your Phoenix location is still correct.
__________________
Stik
Full Timing since 2005
09 Journey 34Y, 2015 Grand Cherokee Toad
stik is offline   Reply With Quote
Old 01-02-2015, 10:07 AM   #8
Senior Member
 
Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 1,029
Quote:
Originally Posted by Steve Ownby View Post
It may just be a warning because both sides of the 120 circuit are on the same phase and its assuming 30 amp. If it were me, I would make up my own 10-12 foot extension cord with 6/3 plus ground wire with the standard 50 amp male and female on the ends.


Steve Ownby
Full time since '07
Thanks everyone for your timely responses. I will order and make the six foot 50 amp extension that I need.
abarkl is offline   Reply With Quote
Old 01-02-2015, 10:31 AM   #9
Senior Member
 
vsheetz's Avatar


 
Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 13,143
If you are only plugging in for battery maintenance and not running air conditioning or electric heat, a regular extension cord with adapter will be enough. I do this rather than lug out the heavy power cord.
__________________
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
vsheetz is offline   Reply With Quote
Old 01-02-2015, 05:28 PM   #10
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,022
This I would not do for two reasons
ONE: 30 amp cords have only 3 wires, 50 amp have 4, thus you either drop a leg or you loose half your power handling ability or you drop the safety ground (Dropping safety features is a good way to be late for your own funeral sooner than you expect.. I plan on being as late as possible for mine).

Second: If you wire it so you can draw full power,, and do so,, Good chance of overheating that 30 amp fuseable link and .. Well, remember FUSE and FUZE are prounced the same, one breaks circuits, the other blows things up.
__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 01-02-2015, 08:55 PM   #11
Senior Member
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 14,051
The reason for the "caution" light may be , the surge guard detects an anomaly in the different wiring, which can be a loose adapter fit on one(most likely 30A cord) of the female ends. (insufficient ground or neutral for example)

Quote:
Originally Posted by wa8yxm View Post
This I would not do for two reasons
ONE: 30 amp cords have only 3 wires, 50 amp have 4, thus you either drop a leg or you loose half your power handling ability or you drop the safety ground (Dropping safety features is a good way to be late for your own funeral sooner than you expect.. I plan on being as late as possible for mine).

Second: If you wire it so you can draw full power,, and do so,, Good chance of overheating that 30 amp fuseable link and .. Well, remember FUSE and FUZE are pronounced the same, one breaks circuits, the other blows things up.
Pretty good analogy. And accurate.
__________________

__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution. "Abraham Lincoln"
Ray,IN 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
Engine battery not charging house batteries belizeanbus RV Systems & Appliances 12 12-08-2014 02:43 PM
50 amp extension cord MutinyGuy MH-General Discussions & Problems 29 12-04-2014 10:22 AM
30 Amp But No 50 Amp Shore Power fixn2gocamp RV Systems & Appliances 27 10-03-2014 04:48 AM
2001 34' Alpine Coach help 4day Alpine Coach Owner's Forum 11 03-12-2014 01:39 PM
New Luxury Diesel Motorhomes from THOR Motor Coach Impress DriVer RV Industry Press 1 11-27-2013 08:28 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:35 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.