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Old 08-28-2020, 04:53 PM   #1
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Several appliances went down at once

Hello,
I recently had to evacuate due to hurricane Laura everything was working fine before I left I'm now able to return but when I hooked up I noticed the AC microwave water heater and washer dryer are not receiving power.
I've done some troubleshooting and found out that half of my breaker box is not receiving power. I was an electronics technician in the Navy so I'm comfortable working with electricity but I don't know where to test on this breaker box. it seems like the power is coming in through the main breaker and then distributing power through the bus to the other breakers. I've attempted to check the power on those leads to a common and I get no reading from the side of the bus I know is bad or from the side that is currently functioning. I've checked power from the main pedestal and it's good although one post is a little low at 108.I've also checked continuity on my power cable from the pedestal to my camper any help would be appreciated.
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Old 08-28-2020, 05:09 PM   #2
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To help we need to know what RV you have, year model number, if 30 or 50 amp supply. From what you are describing, it might be the auto-transfer switch that is acting up.
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Old 08-28-2020, 05:50 PM   #3
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Sorry,
it's a 2009 forest river sierra 355qbq. 50 amp. I've got two AC's the one on the other leg is still working but doesn't cut it in this Louisiana heat.
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Old 08-28-2020, 05:59 PM   #4
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Check voltage from main black and red leads to neutral (or ground) and you you should be getting app. 120 volts AC. Red to Black should be app. 240 volts AC. Are you on shore power or generator? Do you have a generator? Have you reset all breakers by turning them to off position and then back to on?
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Old 08-28-2020, 06:22 PM   #5
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Oh so that's how you check those I'm on 50 amp shore power I verified short Powers good with a multimeter I just got back from the hardware store with a double throw breaker that I suspect is the cause however I will check those voltages first thanks
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Old 08-28-2020, 06:34 PM   #6
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If one leg of the two 120v legs tripped, both legs should trip because they are tied together. Check for 120v on each leg, the red and black 50 amp incoming circuits. If all good there, then it may be the breaker if resetting it does not fix it.

If you are not getting 120v on both incoming legs, check the shore power, your service line is providing 120v from the shore power, and finally check the shore line connection on the trailer. The manufacturers seems to be struggling making good terminations at this location.
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Old 08-28-2020, 06:42 PM   #7
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Well I just. Checked voltage between the black and red wire and I'm getting 116 v. Now I'm lost again.. 118 on top (black) leg. 22v on bottom. Shore power is good. Cable is good. It's definitely on the camper side.
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Old 08-28-2020, 08:23 PM   #8
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Checked out my camper power cord again. Continuity is fine but I'm not sure the amps from the camper side of the cord are correct. One leg looks a little brown.
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Old 08-29-2020, 05:18 AM   #9
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What is voltage at the end of your power cord: Should be L1-N = 120 volts and L2-N = 120 volts. Do you have an on-board generator with an automatic transfer switch?
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Old 08-29-2020, 07:09 AM   #10
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Do you have an electric cord reel?
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Old 08-29-2020, 07:55 AM   #11
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Quote:
Originally Posted by Cramper View Post
Well I just. Checked voltage between the black and red wire and I'm getting 116 v. Now I'm lost again.. 118 on top (black) leg. 22v on bottom. Shore power is good. Cable is good. It's definitely on the camper side.
Am I reading you correctly
1) You read 116 VAC between the red and black wire?
2) You read 118 VAC between the Red wire and neutral?
3) You read 22 VAC between the Black wire and neutral?

If that's correct, the problem is either the campground power or between the pedestal and the RV power panel?
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Old 08-29-2020, 10:50 AM   #12
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Several appliances went down at once

Always check incoming power to neutral with your main off. I have seen a few campgrounds for whatever reason run same phase to both wires, so you will see 120 to neutral, but wierd stuff black to red.
Once you verify incoming power and it's good, pop one of your dead appliances breakers out turn main back on and verity buss voltage to neutral. If it is good check each single breaker. If it's not replace main after disconnecting main power.

Hope I didn't lose ya.
Good luck.
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Old 08-29-2020, 11:30 AM   #13
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Bama, you are correct with what I read from my breaker. To the others, I have no generator and no cord reel. I'll be retesting voltage in the next few minutes and I'll keep you updated.
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Old 08-29-2020, 12:13 PM   #14
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Well everyone thanks for the help. It is in fact the power pedestal. That's the very first thing I checked. Voltage on one leg was a little low but everything else was fine. Now I get the same reading at the pedestal as I do in my breaker box. Must be some type of degrading or intermittent fault. Something that should have been so easy to rule out confused me the most.
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Old 08-29-2020, 12:22 PM   #15
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Those pedistal outlets get alot of use. Look at your plug . If one side is discolored from the other. you camp ground needs tochange that 50 amp outlet. Happens all the time.
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Old 08-29-2020, 12:23 PM   #16
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Checked out my camper power cord again. Continuity is fine but I'm not sure the amps from the camper side of the cord are correct. One leg looks a little brown.
Disregard.
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Old 08-29-2020, 12:23 PM   #17
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It sounds like its not a tight connection. It will arc or not touch at all.
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Old 08-29-2020, 03:52 PM   #18
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I ended p buying an extension cord to run to a vacant pedestal until they can come out to fix mine. Everything works for me now. But my neighbor just had the same thing happen. He offered to swap power cords because his was longer so I could reach the next pedestal over. Turns out his was the same length as mine and didn't reach. When he hooked his back up his AC and fridge didn't work. I tested the pedestal and the same thing. No power on one leg.There is a main breaker panel for the park with a breaker for each lot. It only goes up to lot 26. I'm lot 29 and my neighbor is 31. I'm suspecting they aren't wired the same as the rest of the lots.
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Old 08-29-2020, 03:59 PM   #19
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I've learned so much in two days. At one point I was ready to start taking out wall panels to look for a broken wire/fire hazard. I've found the RV community to be the most generous and willingly helpful. I'm military and I'm full timing to save money for when I get out. I'm 36 and I don't know if I'll be able to stay in long enough to retire. Right now this camper is my life blood. What yall do is important. Thank you.
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Old 08-29-2020, 04:07 PM   #20
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Been following the discussion and am very glad to learn that it's the campground pedestal problem and not a problem with your rig. Thank you for your service.
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