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Old 04-06-2011, 11:55 AM   #1
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Correct voltage readings on a 120v circ.


I have been all over the net trying to find a simple answer, hopefully i can get it here. i am a former navy electrician so that makes me about 70% proficient in civilian electrical theory.

i have a problem with a dishwasher and a garbage disposal on the same line, that suddenly stopped working. with a non-contact volt reader (wand type, flashy and ringing stick) i am picking up potential at the actual buttons of the dishwasher and to the actual connections of the garbage disposal (both with the disposal switch 'on' and 'off' earlier in the circuit). i know that this is not an accurate way to troubleshoot, i need to disconnect the leads and measure the voltage of the hot, neutral and grd lines at each of the junctions in this system in order to isolate the fault.

my question is what should the normal volt reading be for a 120v typical circuit:

hot to grnd
neut to grnd

hot to neut

with this info, i should be good to fix the rest, thx for the help!

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Old 04-06-2011, 12:01 PM   #2
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Correct voltage readings on a 120v circ.


Hot to neutral or hot to ground should be around 120v. Neutral to ground should be 0.

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Old 04-06-2011, 01:21 PM   #3
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Correct voltage readings on a 120v circ.


Generally as above but 120 volts + or - 10volts
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Old 04-06-2011, 01:56 PM   #4
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Correct voltage readings on a 120v circ.


ok, problem solved... the CB needed a good 'ol re-seating. traced the line all the way back to the main breaker box, pulled the bkr, did a continuity test on it, and plugged it back in, hooked up the line and wala, 120v across the hot/nuet leads in the original j/c box. good to go! thx for input!!
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120v, curcuit readings, hot nuetral ground, readings


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