I've just seen this article in E&T highlighting the increased incidence of reported broken PEN's from 57 in 2003 to 474 in 2021. It seems they are becoming less of a rare event.
David
I've just seen this article in E&T highlighting the increased incidence of reported broken PEN's from 57 in 2003 to 474 in 2021. It seems they are becoming less of a rare event.
David
It strikes me that a functioning VOELCB could be the answer, but only if:-
The moment that the incoming PEN drifts too far from real earth, the power would be completely shut off.
It strikes me that a functioning VOELCB could be the answer, but only if:-
The moment that the incoming PEN drifts too far from real earth, the power would be completely shut off.
Simon Barker you've made some great suggestions, and believe me, I've looked at this in great detail, but there are still some issues.
It's not just incoming services that would have to be plastic ... there are a number of structures with substantial amounts of steel, which are extraneous-conductive-parts too.
And this leads into the second issue of a VOELCB, which is where to put a suitably segregated earth electrode so it's looking at "true earth".
There actually are some modern VOELCBs that have a measurement earth electrode out there on the market, it's just looking at how we use them, which has been the difficulty with their use for many EV charging installations.
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