Quote:
Originally Posted by TonyDuell
"If I see a switchboard where the incoming wires are black and blue, how do know if it's 'blue phase' on the old colours or 'black phase' on the new?"
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I was working on a large construction site where the electricians were swapping the wiring over for the dozens of Portacabins from generators to mains, to save time they missed the check, I suspected something wasn't right when the power came on and the lighting was much brighter, followed by many load bangs as the switch-mode power supplies let go in the computers, copiers and AV training equipment, very little survived and the electricians received are very large bill for the damage.
