StreamlineGT
Senior Member
Long story short..
Condo has aluminum wiring, insurance company wants arc-fault breakers. Installed arc-fault breakers in the first unit, as a guinea pig. Intermittent tripping is occurring, widely scattered, but usually once a week. I purchased the Extech megger upon direction of a previous thread. I tested the three circuits in question. Everything was unplugged, and light switches turned off. All testing was done hot to neutral. No neutral to ground tests were performed at this time.
Tested a circuit that has not been a tripping problem, and it was clear.
Tested the one that trips the most, and it read 141 on the 2000Mohm scale.
Tested the one that trips once a month, and it read 885 on the 2000Mohm scale.
Tested the one that trips often, but not as often as the most, and it was clear.
This leads me to believe that the clear tripping circuit is either a connected appliance, or a straight over current. Likely not an over current, but it could be. There are no lighting loads connected to this circuit, so having switches off was of no consequence.
My question is this, what do the other values mean? Reading the instruction manual got me nowhere. I am not the sharpest tool in the shed, so if someone has some useful information it would be greatly appreciated.
Thanks,
Brendon
Condo has aluminum wiring, insurance company wants arc-fault breakers. Installed arc-fault breakers in the first unit, as a guinea pig. Intermittent tripping is occurring, widely scattered, but usually once a week. I purchased the Extech megger upon direction of a previous thread. I tested the three circuits in question. Everything was unplugged, and light switches turned off. All testing was done hot to neutral. No neutral to ground tests were performed at this time.
Tested a circuit that has not been a tripping problem, and it was clear.
Tested the one that trips the most, and it read 141 on the 2000Mohm scale.
Tested the one that trips once a month, and it read 885 on the 2000Mohm scale.
Tested the one that trips often, but not as often as the most, and it was clear.
This leads me to believe that the clear tripping circuit is either a connected appliance, or a straight over current. Likely not an over current, but it could be. There are no lighting loads connected to this circuit, so having switches off was of no consequence.
My question is this, what do the other values mean? Reading the instruction manual got me nowhere. I am not the sharpest tool in the shed, so if someone has some useful information it would be greatly appreciated.
Thanks,
Brendon
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