A friend commented that three phase wiring was “all the colours of the rainbow”.I laughed rather a lot then explained the new colours to them. It’s the grimmest rainbow ever. Brown, black and grey; although there’s blue, green and yellow to give and interest.
I know this is nerdy stuff, but today I encountered the highest PSC (Prospective Short-Circuit Current) that I’ve ever encountered on an installation. 23kA was the figure I found, with an external loop impedance of just 0.01A So, why you ask am I sharing this? Let me briefly explain. All breakers have a maximum “breakingContinue reading “High PSC’s…”
Changed all 27 lights in this building. Every single one had to have the hole tidied up as the old holes were really badly cut and not round.