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05-26-2014, 06:34 PM
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#1
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Junior Member
Join Date: Jul 2012
Posts: 5
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Shore Power Plug Black and melted
I recently unplug our 30 amp shore power from our class A motor home and noticed one of the terminals on the motor home was black and the corresponding female terminal was black on the plug. The plastic looked like it had melted. does anyone have any idea what happened? Is their an ongoing problem? did we simply pull to much across the line? Any help is appreciated.
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05-26-2014, 06:41 PM
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#2
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Senior Member
Newmar Owners Club
Join Date: Oct 2009
Posts: 10,310
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Bad connection......
Quote:
Originally Posted by JMcCranie
I recently unplug our 30 amp shore power from our class A motor home and noticed one of the terminals on the motor home was black and the corresponding female terminal was black on the plug. The plastic looked like it had melted. does anyone have any idea what happened? Is their an ongoing problem? did we simply pull to much across the line? Any help is appreciated.
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Most of the time with the condition you are describing, a bad ,dirty ,loose connection will cause it to build heat at the weakest point, the melted part that you see, is the weakest spot, bad connection more than likely......
I carry this http://www.homedepot.com/p/CRC-2-26-...2004/100398344 in my Coach, every power pedestal gets a shot, and I keep my terminals(male plug) polished and clean. That CRC 2-26 is a great product! Cheap enough also. A shot in all my outdoor outlets at home makes them like new.......
__________________
2012 Essex 4544 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006 Ultra & 1989 Springer, 2003 Harley-Davidson
FLHR Road King Anniversary
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05-26-2014, 06:53 PM
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#3
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Moderator Emeritus
Join Date: Jan 2007
Location: Litchfield Park, Arizona
Posts: 10,530
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Welcome to the forum.
Palehorse pretty much kit it on the head. Loose/dirty connections create a high resistance which creates heat and begins to melt stuff.
Rick
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Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD
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05-26-2014, 07:43 PM
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#4
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 15,749
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Yup, likely a loose or dirty connection.
__________________
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.
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05-26-2014, 08:45 PM
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#5
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Junior Member
Join Date: Jul 2012
Posts: 5
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Dirty or loose
Thank you for the replies .. since the issue is on the end plugged into the coach. Should i clean the receptacle on the RV? Should i open it up and look for damage? Do i need to replace the plug?
I appreciate your help.
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05-27-2014, 05:49 AM
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#6
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Senior Member
Join Date: May 2005
Location: Full-timers - Home is where we park it.
Posts: 4,722
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If the power cord has a replacement plug (not molded on), it could also be a loose connection inside the plug. Replacement plugs have screw terminals inside. There could also be a screw terminal inside the female plug on the coach that's loose.
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05-27-2014, 08:43 AM
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#7
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Senior Member
Join Date: Sep 2012
Location: Tasmania now, USA/Canada/Alaska in April
Posts: 2,473
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Also VERY likely that the contacts inside the shore outlet have overheated and have lost their tension, so plugging your plug back in will cause the same result.
Old campgrounds + lots of people over the years either not plugging in fully or having heavy cords hanging so they pull partly out = bad receptacles.
Only real cure is to fit a new outlet.
Since this one is at the coach end then possible it has been partly pulled out, or there is a loose connection in the plug or the socket
__________________
Tony Lee - International Grey Nomad. Picasa Album - Travel Map
RVs. USA - Airstream Cutter; in Australia - MC8 40' DIY Coach conversion & OKA 4x4 MH; in Germany - Hobby Class C; in S America - F350 with 2500 10.6 Bigfoot camper
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05-27-2014, 09:19 AM
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#8
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Senior Member
Join Date: Feb 2010
Posts: 4,654
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If on coach end just replace the coach part
And get a good one.
Maybe consider changing to different interface with more headroom.
You would need to change plug on cord but it needs to be changed anyway.
Take a trip to a well stocked electrical supply where they know what they are doing and take your melted cord.
They can assist in selection of same type replacement or upgrade to something different.
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Tony & Lori
1989 Country Coach Savannah SE
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05-27-2014, 09:32 AM
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#9
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Registered User
Join Date: Mar 2010
Posts: 8,777
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JMcCranie
Not only loose connections cause a problem like yours.
Sometimes it's caused by drawing more amps than the connectors are rated for.
Mel
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05-27-2014, 11:18 AM
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#10
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Senior Member
Damon Owners Club Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,024
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And Ill bet it was the neutral that burned, for some reasons it's always the neutral... Do not know why.
On a more serious note: I would cut the cord back and put a new Camco Power Pull plug on it or equivalent. NOTE: Buy 2 of those plugs, keep one in your spares kit.
As others have said, it is a problem with the connection between plug and socket,, Every time you plug in inspect plug and polish if needed (Alas you can not fix the socket as easily).
And expect it to happen again. (Why you keep a spare)
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Home is where I park it!
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