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Old 07-16-2011, 12:54 AM   #16
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123 volt down to 117 volts in 5 feet


Did you any chance try read the voltage with diffrent voltmeter some case they can be very senstive and may cause reading stray voltage or something can affect the reading.

Some case the best answer is run the ohmmeter and read the ohms on the conductor between the two spots as someone mention above and I have a feeling there may be a nick on the conductor or nail or something hit it.

Few case I do find them a flying illegal spices so end up fix it properly.

Merci,
Marc

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Old 07-16-2011, 06:08 AM   #17
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123 volt down to 117 volts in 5 feet


Are you sure you are comparing apples to apples?

Measuring X volts at outlet A with no load anywhere in the house and measuring Y volts at outlet B with some load anywhere in the house is comparing apples to oranges.

The chances of accurate readings are greatly improved if you measure each location twice alternately, that is, outlet A then outlet B then outlet A again then outlet B again. Are both the outlet A readings identical and both of the outlet B readings identical?

Jiggle the test probes to make sure you are getting a good contact.
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Old 07-16-2011, 11:53 PM   #18
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123 volt down to 117 volts in 5 feet


Quote:
Originally Posted by Wildie View Post
If the outlets are only 5' apart, measure the resistance of the wire with an ohmeter on its lowest scale.
The resistance, white to white should be exactly the same as the black to black resistance.
If there is any difference its likely to be a cracked conductor.
I would expect both conductors to be close to zero resistance.
I have a Craftsman Professional multimeter and never even knew what the ohmeter was for. I watched a few videos on youtube and finally figured it out. While testing, I was moving the wire with my hand. I noticed that the ohms would change if the wire was moved. So I pulled more of the wire out of the wall and it was broken. The insulation was holding it together.

Thanks,
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Old 07-17-2011, 06:27 AM   #19
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123 volt down to 117 volts in 5 feet


A reminder to those folks eavesdropping. Turn off power before using an ohmmeter or continuity meter or the ohms function of a multimeter.

Also if you are testing a wire, remove that wire from any screw or hole it was connected to before testing. If you are testing at a screw terminal, remove all wires from the screw before testing. This will reduce the chance there is an alternate route for a tiny current emitted by the ohmmeter and such an alternate route will mess up the reading. (You only need to do this for one of the two meter probes.)
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Old 07-17-2011, 07:38 AM   #20
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123 volt down to 117 volts in 5 feet


Thanks for the update and it is good that you followed through and found the problem.

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