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Old 10-25-2008, 09:25 AM   #1
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bad breaker?


my bedroom light just went off.... hmmmm, i check breaker and it's tripped. reset it and in 8 seconds it trips again. hmmm, unplugged everything in the bedroom, ....same thing. bad breaker?

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Old 10-25-2008, 09:31 AM   #2
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bad breaker?


No, the breaker is doing it's job. You have a short circuit somewhere.

I know for a lay person a "bad breaker" is always a first thought knee-jerk reaction to a tripping breaker, but this is not the case 99.9% of the time.
Usually a breaker trips for a reason.

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Old 10-25-2008, 09:48 AM   #3
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bad breaker?


wouldn't a short trip immediately? it varies from 4 to 10 seconds.... and i THINK we unplugged everything in the room. still checking.

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Old 10-25-2008, 10:10 AM   #4
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bad breaker?


found the culprit.... the previous owners evidentally patched into that line to run an outside pump that seems to have just died.... owell. at least i know what it is now. i disconnected it as it is not needed now and will rewire next year up to code when i tackle that end of the home. thanks speedy! end of thread.

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Old 10-25-2008, 10:14 AM   #5
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bad breaker?


Swap the cable to another breaker and find out.

Some heavy load (motor) devices have a built-in "surge protection" that stops an initial heavy draw. An example of this is a soft-start router. But there are many more. The only true test to see if you have a draw on the circuit is an ammeter. A VERY crude test is to disconnect the neutral and see if it arcs as you attach and remove it from the neutral bus. You can normally see an arc for 1 amp draw. Be careful though because the neutral wire is LIVE when it is disconnected and there is a device or short on it.

You can also test the voltage of the disconnected neutral. If there are no devices or shorts on it then it should register less than 3 volts. If it registers 110 plus then you haven't switched everything off or unplugged everything, or you have a short.

Edit: sorry - too late - replied between messages

Last edited by Paulustrious; 10-25-2008 at 10:16 AM.
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