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Joined: Apr 2002
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408.16(F)
A screw, clamp, or some other method must be used to hold the breaker in place. You cannot simply "snap" it in place like a breaker used in the normal fashion.
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Joined: Oct 2000
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triple A correct reference for "backfeeding" and the question was asked so that you would also search for a appropriate answer in the UL book. See Page 14 in the UL Directory: LINE-LOAD CONNECTIONS
Line and load markings on a circuit breaker are intended to limit connections
thereto as marked.
Joe Tedesco, NEC Consultant
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Joe: I'll be the first to admit that I am guilty of not knowing about the "line/load" limitation. I am curious, however, as to how many breakers have the line and the load side marked. Is this common?
[This message has been edited by Ryan_J (edited 10-10-2003).]
Ryan Jackson,
Salt Lake City
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Ryan:
I imagine that CB's of various type have been marked that way for quite some time, but have no specific date.
If I can recall the "Backing Feeding" rule triple mentioned was put into the NEC after an accident where the CB popped out when an electrician removed a cabinet cover to expose a panelboard and the energized CB prongs or blades? electrocuted him!
If I could get to my archives down in my dungeon, I could search for that information in the TCR (Technical Committee Report) or TCD (Technical Committee Documentation) back in?? 1983 I think.
Joe Tedesco, NEC Consultant
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Joe,thanks again.This publication makes a lot of the Nec requirements clearer,to me at least.
Russell
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Thanks for the white book. Could you post the green book also?
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Joined: Oct 2000
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No, because I don't have it. Maybe UL can make it available, but it probably will not be free.
Joe Tedesco, NEC Consultant
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