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midnightsadie's avatar
midnightsadie
Explorer II
Jun 16, 2015

question? can you get shocked from 12volt?

kids tote trailer has 12volt electric jack ,and last week in the rain, they say they got shocked when some body touched the trailer. I know nothing about electric things.

30 Replies

  • Can 12 volt power shock? Start the engine. Reach under the hood, and grab the coil wire. Come back and tell me what you felt. IF you can still type.

    Well yes I did, on a 1970 460 CI Lincoln. Couldn't move my arm for a whole day after.
  • No. Put your hands on both sides of you battery - you'll feel nothing.
    Now if your able to make a small connection with moist skin you may be able to feel a little tingle but that's about it.
    People that get shocked in RV's are feeling the 120V side.
  • Vulcan Rider wrote:
    JAXFL wrote:
    If you stand on the metal bummer of a car with both feet and grab the battery....yes! Don't ask how I know this.


    For this to actually draw enough current that you can feel, at least one foot would have to be bare and moist. If you were wearing shoes at the time, the sensation you felt was not due to current flow from the battery.


    OH yes... had shoes on, no rain, dry California summer, 1957 Chevy, knocked me all the way off the bummer onto my rump.
  • Yes you can get a shocked by 12V.
    Noticeable to the human body - Yes
    Dangerous to the human body - No

    If touching the trailer in the rain gives a shock, it could be nothing. But I advise to check your wiring making sure the hot lead is properly isolated & insulated, and ground is proper or you could risk draining your 12V battery. Worst case scenario would be potential for an electrical fire. If everything is in good order, consider unplugging the electric jack when not using it, or adding a water-proof switch to power it.

    Being a trailer, you can't rule out the possibility that the issue is related to the tail lights. Inside where the bulbs are might be taking on water. Make sure they are properly sealed. Sometimes a wire-sealing rubber grommet has dry-rotted and fallen out. Sometimes the lens can tolerate taking in water. Then make sure the weep holes are clean.
  • JAXFL wrote:
    If you stand on the metal bummer of a car with both feet and grab the battery....yes! Don't ask how I know this.


    For this to actually draw enough current that you can feel, at least one foot would have to be bare and moist. If you were wearing shoes at the time, the sensation you felt was not due to current flow from the battery.
  • If you stand on the metal bummer of a car with both feet and grab the battery....yes! Don't ask how I know this.
  • Normally not but it is possible under some conditions. Body resistance is normally high enough that you would not feel shock at 12 volts. Maybe standing in salt water and your whole body was wet you couod feel it. If you take hold of multimeter probes you can measure your resistance. Sweaty hands or how tight you hold probes you can see how resistance changes. My resistance is about 5 meg ohms with dry hands and approx 1 meg ohm with wet hands. Muptiply that times current and dangerous levels run about 3 ma. i.e. 3000 volts. However, that is why they tell people not to use hair dryers in the bathtub.:B Once all wet all bets are off the table. As a practical matter suspect you had your RV plugged into AC and have a bad ground.
  • Were you plugged into 120VAC? That usually occues with a bad ground.
  • RoyB's avatar
    RoyB
    Explorer II
    Touching 12VDC does not bother me but who knows about others. The hazard with 12VDC is getting burned when the positive side touches the negative side and you try to pull them apart...

    The POST you are referring too in most cases ends up being a camp pedestal problem with the NEUTRAL LEAD creating a shock from touching the trailer frame ground while standing on Earth ground. It would have been a real big shock standing in water with bare feet. I haven't read that post yet this morning but what was posted yesterday sure needed more info from the post to determine what the cause was. It was a definite 120VAC problem not a 12VDC problem...

    Roy Ken
  • Ivylog's avatar
    Ivylog
    Explorer III
    Hard to feel 12V although you can test a 9V battery by putting it to the tip of your tongue for a slight tingle. Something else is shocking them. Unhook from shore power and doubt they will feel anything.