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Re: OT: Mains Safety PSA

 

I was walking by a 100A, three phase breaker box at work one day, and I could feel heat from about 18 inches away. It was at a cable TV headend, so we had to bring in a team of electricians to replace the wires and main breaker, starting at midnight. We were down most of the night which was bad enough, but people would have gone nuts if it was daytime with a six hour outage.


On Fri, Jan 14, 2022 at 9:50 AM Harold Foster <halfoster@...> wrote:
One thing that is not often thought about (or known) is the need to verify the breaker screws and main lugs are torqued to the correct specification. Copper and aluminum will both deform over time and you can wind up with a higher resistance connection with the resulting heat and/or fire.

And especially on newer construction, make sure that any aluminum connections had anti oxidation gel applied.

Hal

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