Kiwi,
"Sir, I need to throw the big switch on your bank's data centre while I connect my PQ recorder". Yeah, right!
In actual fact, I have only had one client (oh yes, it was a bank too!) to date who would not let me connect live - to their detriment! Before I could connect up the kit at the next scheduled shutdown, they lost their data centre because of a set of loosening busbar bolts (something the PQ survey would have picked up).
Strangely, I don't get the shivers with open busbars. It's more for the cowboys I've seen in action. I'm more than happy to work live to 690VAC (or thereabouts - I get vertigo at 1kV).
But I ramble, the whole purpose was merely a ha'penny thought should it influence someone to put in reasonably costed testing facilities for our modern power-hungry world!
Marc.
