posted on Jan, 12 2018 @ 02:35 AM
originally posted by: dashen
B&C shorted in two places?
I'm going to award it to you, dashen! You are so incredibly close we're practically splitting hairs here.
If you would have said just "B & C are shorted" you would have the correct answer, but there's more to it than that.
You see if the B & C conductors actually "shorted" you'd have a phase to phase short (bad ju-ju).
What had happened was the B conductor came free of the lug in the distribution panel. Because cable that big is so stiff, the B conductor wanted to
go back to a straight position. Because the feeders entered the lower left side of the panel they were all bent to the left to make up the lugs.
When the B phase came loose it sprang to the right contacting the C lug in the panel. So, technically it wasn't a "short", but rather an open that
then re-energized itself on the C leg, hence the 277 reading between B and C. It didn't have to touch in "two" place, but rather only one in this
We believe that the electrician who made up the connections didn't torque the lug properly. Then when it was under load and heated up the conductor
came loose and ultimately came free. That electrician lost his job.
And now you know...the rest of the story.
edit on 1/12/2018 by Flyingclaydisk because: (no reason given)