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Old 05-29-2012, 04:44 AM   #1
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Cord Burned

Nice weekend until Saturday evening. Back A/C quit working, wouldn't go off of Shed from EMS. Thought it was a breaker possibly again since this happened a few years ago and a quick flip of the EMS breaker solved the issue. Didn't work this time. Since the front A/C was working, figured I would get it looked at after we got home. Went to leave yesterday and saw the 30AMP cord to the post, one of the terminal prongs on the cord was pretty much burned and another one almost there. Looked like it overheated and just started to melt. We do have a surge guard on the coach, but it never tripped.

Guess we are lucky it wasn't any worse so now I'll have my friendly roaming RV Tech replace the cord and hopefully fix the A/C issue that quit working. Check your electrical cord prongs on a routine basis, clean them with a wire brush or some light grit sand paper. If there lose or look bad, replace that cord before it becomes an issue
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Old 05-29-2012, 05:02 AM   #2
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BOTH A/C's were running on 30 amps?
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Old 05-29-2012, 05:05 AM   #3
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No they don't both run at the same time. Believe the EMS runs one at a time (cooling), alternating based on temp within the coach. The back one was running on fan only, no cooling taking place. The front however was cooling with no issues.
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Old 05-29-2012, 05:36 AM   #4
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If your plug does not fit tightly enough into the receptacle arcing will occur causing the effect that you see.
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Old 05-29-2012, 06:06 AM   #5
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Thanks everyone, once the RV Technician looks and repairs I'll let everyone know the outcome.
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Old 05-29-2012, 06:32 AM   #6
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That happened to me and it turned out the CG's pedestal receptacle was bad. My cord was new before the plug melted and the CG replaced it, which was only right.
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Old 05-29-2012, 07:51 AM   #7
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Quote:
Originally Posted by rmmpe View Post
That happened to me and it turned out the CG's pedestal receptacle was bad. My cord was new before the plug melted and the CG replaced it, which was only right.
Owned a campground for 7 years, and, without a doubt, the most problem with summer maintainence, were the power recepticles.
MOST, not ALL, of the causitive factor was that the majority of folks do NOT switch off the pedistal breaker BEFORE they unplug. There is always a load on the RV system, be it TV, Microwave, battery maintainers, water heaters, any number of things that draw current, however small it may be.
Over the years, I saw way too many people pull the plug, WITH the AC running! YIKES>>>>>>>
Talk about an arc!
Both recepticles and plugs loose when disconnecting, or for that matter, connecting, BEFORE throwing the breaker in the pedistal to the OFF position.
After a holiday weekend, we would go around the electric sites, 125 of them, and 80% or more would still be ON.
Protect your new plug....throw the switch before you plug/un-plug,,,
Above all.....have fun!
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Old 05-29-2012, 08:21 AM   #8
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Very definitely agreed !!!!!!
Make it a habit of turning ALL breakers off before connecting and/or disconnecting.
AND, turn off the water to your rig if you're going to leave the CG for any reason or duration.
AND shut your tank drain valves to prevent backflow into the rig if the sewer pipe downstream of you plugs up or is crushed (I've seen that happen and it's not pretty ).

Leave it better than you found it.
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Old 05-29-2012, 09:25 AM   #9
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The problem with the plugs is the fact that the receptacle is used so much. Most people plug in a dryer at home and it is never unplugged for years. Whereas a motorhome is unplugged almost daily. This causes the receptacle to loosen and arc. Your plug should be checked regularly and cleaned often. As another poster said, you should always throw the CB when plugging are unplugging.
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Old 05-29-2012, 11:08 AM   #10
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See, now this is one of those "you learn something new everyday" type of instances. I never put any thought into the electrical connector, Just put it in if it fits and buy an adapter if it doesn't. Never thought about the breaker (unless it popped). I'll try to add this to my list of things to do when hooking/unhooking.
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Old 05-29-2012, 11:35 AM   #11
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Standard stuff. Good to remember. Never plug or unplug a loaded circuit.

Same goes for the genny. Starting the genny with the shore power on, or viseverse... Is not a great thing for your rigs transfer switch.
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Old 05-29-2012, 01:57 PM   #12
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I keep a spare 30 amp plug (Camco Power Pull or equivlent) in my box just in cuss that happens. (Cuss is what you do when it happens) replacing the end is simple.
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Old 05-29-2012, 02:04 PM   #13
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RV Tech will be here at 8:00am tomorrow and I agree as stated, always turn off the switch before plugging in and pulling out. Great advice.
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Old 05-29-2012, 07:17 PM   #14
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Seems like half the camp grounds we pull into the breakers in our power pedestal are on.
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