Double Tapped Neutral? WARNING!!!

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bullheimer

Senior Member
Location
WA
DAMMIT! i think we all know that when the Service drops a neutral a LOT of things in the house can BLOW UP! keep this in mind when you get a call to fix problems listed on a Home Inspection report, which almost ALWAYS has double tapped neutrals on the neutral bar. I have been in the BAD HABIT for years of just making a hole by putting two grounds under a screw, then just undoing a double tapped neut and putting it in the hole w/o bothering to identify the ckt and turn off the breaker. MAN I BEEN LUCKY!

until this summer when i did that and the people inside raised ALL kinds of hell about the sparks flying out of the gas range!!! well i never checked to see if that damned neutral was coming from a 3-wire circuit, it was and, just like you would expect, it fed 240 to the range. $600 later and my first insurance claim, i am passing this little bit of knowledge to you from the SofHK. So turn OFF the breakers when you do this! (my second range btw, i didn't label a wire i removed during a panel change once and fed a gas range 240 from the breaker. Don't do THAT either!!! (It had been an electric range at one time but was altered into a 120V ckt. Somehow i labeled it as a hot.)) Checking the appliances for gas vs electric during a panel change might be another little practice that can save your butt before you install 240 breakers. It's a wonder i made it this long without blowing stuff up.

Basically just use the common sense i didnt use.:dunce:
 
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i got hit off a three wire neutral once. both breakers were turned off, i pulled the neutral out and bam. some jerky electrician put those smart switches in that require a neutral and tapped onto the three wire neutral...
 
When you lifted that neutral, you changed a MWBC using the neutral to a 240V series load with uneven impedances, and blew something up that didnt like the 120++V. Oops.

$600? not bad. Ive seen an auger bit ruin a 100 yr old floor cost 1200 to fix a 1/2" hole, and we can go 5 digits for hitting a concrete tension cable.

Insurance: because nobody is perfect. even if you commit no errors, it's possible you can still be successfully blamed.
 
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