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JON O'BOYLE: Alright just pull on these, uh no, here, just take it off for a second
Alright, just pull on that elbow, you have to
have a place to put it when you're done. That's why you have to have a stand off bushing of some kind
to put it on there. This particular stand off bushing is a feed through bushing
Whereas, whatever voltage you put in through this side, on this elbow
with this elbow, will come out on this side. The same thing works for grounding
If you ground this side, you can ground the cable end on this side
and install it on the transformer.
OK, bring your stick up
drop it down
now back your stick off, that's good
and screw it down
When we're working on it? STUDENT: If it's not grounded, it's not good. O'BOYLE: If it's not grounded
it's not dead, but what does that protect us against? What does grounding this wire
protect us against? STUDENT: Back feed O'BOYLE: Back feed is one of them
Someone accidentally turning that line back on. A third one of induced
voltage. Maybe a line somewhere else is inducing voltage on to it through the magnetic field
Back feed is one of them but long story short
this is how you know it's safe to work on. Can you still bare hand it at this point?
STUDENT: I wouldn't O'BOYLE: I would not want to, I would still want to have my rubber gloves on and all my
PPE when I'm working on this, even though it's grounded.
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