|
06-23-2021, 11:56 AM
|
#1
|
Member
Join Date: Feb 2015
Location: Calgary
Posts: 57
|
Low voltage from trailer to ground?
So I was working on my trailer yesterday - Just put in some new jacks, which required drilling a few new holes. I was climbing out from under the back of the trailer and grabbed the bumper and I don't know if I felt a shock, or just rolled a nerve and got that "funny bone" buzzy feeling. I'm leaning towards the latter.
Anywho, I grabbed my multimeter and I measured about 0.4v DC from some exposed metal on the trailer to a wet spot in the gravel ground. Thought to myself, WTF, so went to the front and got the same reading from the jack stand to the ground.
Here's where it gets a bit weird.
I am not connected to shore power, just 12v battery, and solar.
I disconnected the solar/battery and I get the same 0.4 DC reading.
My father has a small home built tear drop parked next to ours with no power systems (just a trailer signal/break lights), and I'm getting the same 0.4v from his hitch to ground.
I tried a hand full of other trailers in the storage lot and they all got 0.2-0.4 DC from the jack to the ground.
I also tried 2 different multimeters. I can't detect any amperage though.
Anyone have any ideas?
__________________
2015 Starcraft 26BHS
2014 GMC Sierra 1500 SLT
|
|
|
06-23-2021, 06:25 PM
|
#2
|
Senior Member
Join Date: Mar 2021
Location: St Johns MI
Posts: 1,728
|
Tingly
Any utility poles nearby? I have heard of high voltage leaking from poles. If so, call your utility company.. Hydro Eh! and see what they say.
Strange issue.
__________________
2020 Pinnacle 32rlts
640 watts solar, 300AH lithium
2020 High Country Duramax 3500
TS3 Hitch
Ms says I'm full of useless knowledge and other stuff...
|
|
|
06-23-2021, 07:13 PM
|
#3
|
Member
Join Date: Feb 2015
Location: Calgary
Posts: 57
|
Quote:
Originally Posted by ARoamer
Any utility poles nearby? I have heard of high voltage leaking from poles. If so, call your utility company.. Hydro Eh! and see what they say.
Strange issue.
|
Nearest utility pole is about 130 yards away. Not a big pole, just a single line on it.
__________________
2015 Starcraft 26BHS
2014 GMC Sierra 1500 SLT
|
|
|
06-23-2021, 07:38 PM
|
#4
|
Senior Member
Join Date: Dec 2020
Location: Spring
Posts: 928
|
Really do not see how 0.4V DC would give a shock. Does your trailer have an Inverter?
__________________
2016 Starcraft AR One 18QB
2016 Colorado LT 3.6L V6 Ext. Cab
|
|
|
06-23-2021, 08:00 PM
|
#5
|
Senior Member
Join Date: Apr 2017
Location: Inland Empire, California
Posts: 2,005
|
You should not be able to feel anything from .5 volt. Since you are measuring this on everything you test I would say there is not a problem with your rig.
Just for the fun of it (?) can you insulate the the jack connection to ground? I am assuming there is no wheel on the jack. This would be the only connection point to ground so in theory if you break that connection you would not be able to measure anything from ground to your rig.
Have you tried measuring anything else from ground to metal? Cars (they would be isolated through the tires), yourself (maybe touching ground), whatever.
__________________
Jim
Retired electronic technician (45 years in the field)
2017 Greyhawk 29W (solar & many other mods)
wife (maybe I should have given her top billing)
|
|
|
06-23-2021, 08:06 PM
|
#6
|
Senior Member
Join Date: Mar 2017
Location: Kingman, AZ
Posts: 1,985
|
I know you said you were not on shore power, but did you check for AC voltage on your meter? Usually DC voltage isn’t felt at such a low voltage.
__________________
Lee & Kathy, and our alarm clock Jake!
2017 Starcraft Autumn Ridge 266RKS 50 amp.
2017 Toyota Tundra Crewmax 4x4, 10-1-2021
|
|
|
06-23-2021, 08:29 PM
|
#7
|
Member
Join Date: Feb 2015
Location: Calgary
Posts: 57
|
Quote:
Originally Posted by Route 66 Traveler
I know you said you were not on shore power, but did you check for AC voltage on your meter? Usually DC voltage isn’t felt at such a low voltage.
|
Yeah, didn't see any AC voltage.
__________________
2015 Starcraft 26BHS
2014 GMC Sierra 1500 SLT
|
|
|
06-23-2021, 08:30 PM
|
#8
|
Member
Join Date: Feb 2015
Location: Calgary
Posts: 57
|
Quote:
Originally Posted by JimD
You should not be able to feel anything from .5 volt. Since you are measuring this on everything you test I would say there is not a problem with your rig.
Just for the fun of it (?) can you insulate the the jack connection to ground? I am assuming there is no wheel on the jack. This would be the only connection point to ground so in theory if you break that connection you would not be able to measure anything from ground to your rig.
Have you tried measuring anything else from ground to metal? Cars (they would be isolated through the tires), yourself (maybe touching ground), whatever.
|
The jack is sitting on a scrap piece of 2x6. I couldn't find any voltage from my truck hitch to ground. Actually my dad's little trailer where I found the same .4v has a plastic wheel on the jack.
__________________
2015 Starcraft 26BHS
2014 GMC Sierra 1500 SLT
|
|
|
06-23-2021, 08:31 PM
|
#9
|
Senior Member
Join Date: Mar 2017
Location: Kingman, AZ
Posts: 1,985
|
Must have just pinched a nerve…..
__________________
Lee & Kathy, and our alarm clock Jake!
2017 Starcraft Autumn Ridge 266RKS 50 amp.
2017 Toyota Tundra Crewmax 4x4, 10-1-2021
|
|
|
06-23-2021, 08:38 PM
|
#10
|
Senior Member
Join Date: Mar 2017
Location: Kingman, AZ
Posts: 1,985
|
We had a friend who had high voltage power lines running close to their property line. For fun the kids would run around after dark holding fluorescent tubes and watching them glow in the dark. The closer they got to the lines, the brighter they got.
That was the premise of my previous question….
__________________
Lee & Kathy, and our alarm clock Jake!
2017 Starcraft Autumn Ridge 266RKS 50 amp.
2017 Toyota Tundra Crewmax 4x4, 10-1-2021
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|