No power! Need help.?
Question:I have two pairs power lines coming into garage. One seems dead. The other reads like this: White & blk =124v
White & grnd = 101v
blk & grnd= 22v
Seems like the white is acting like the hot. What do i do? Nothing is working even if I reverse the lines.
Answers:
It sounds to me that you may have a break in the wiring, in particular the white wire. This could be from a loose wire nut at a splice, or from a loose screw in the connection at a receptacle.
Normally, the black wire is "hot", and the white wire is "neutral". Since the white wires and the ground wires are tied together at the breaker panel, the voltage on the white wire with respect to ground at the receptacle should be essentially zero. But you measured 101 volts, which indicates a possible open circuit in the white wire. If you have a high input impedance meter, like the typical digital voltmeter, the open white wire could appear to have a voltage on it just from capacitive coupling from the adjacent black wire in the Romex.
The thing to do is check the wiring receptacle by receptacle all the way from the breaker panel to the end. Somewhere you've got a bad connection. If your home was built 40 years ago or so when aluminum wire was in use, it is quite possible that the wire has cold flowed over time. This could even start a fire under the right conditions. Be thankful that didn't happen to you.
check to see if it is on a switch, if so, the switch may be wired wrong which is why the power seems to be reversed.
Open all your breakers, measure at the main. You should have 120v to ground on both and 240 volts across. Unless you only have a 120 volt service. There should be three wires coming into your house's weatherhead if it is 240 volt and only one and a neutral if it is only 120volt. But, if you have three then you have to follow them back to the transformer looking VISUALLY ONLY for an open wire or splice. But, if you know you should have a 240 volt service and only have 120 at the main breaker with the others open then it is the power company's problem. Call them. If you have 240 at the mains and the other readings at your garage it is your wiring and you have an open of some sort, hire an electrician if you don't believe you can sort it out. Remember, you will be dealing with stuff that can hurt you, kill you or burn your house down. Think before you move.
check to see if the netural wire is broken at the source or at the other end
Could this be a 220 volt circuit? If so, you will have a double breaker, I have run into this when 1/2 of the breaker went bad.
Hope this helps!
use a soleinoid tester
as it will vibrate when there is voltage
some digital tester pick up on phantom or ghost voltage, especially inductive current on either the neutral or hot, or you could have a open neutral or a backfeed.
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