dead metal part

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flyingcat2008

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The spacing between field wiring terminals of opposite polarity and the spacing between a field wiring terminal and a grounded dead metal part shall be least 1/4 inch when short-circuiting or grounding of such terminals results from projecting strands of wire.
HI, everyone!
I don't know if it is appropriate to ask this question here, but I really need help for I didn't found a better answer in good search.
In electric, what is dead metal? It means this metal is insulated?(I am doing a ul related work,so I really want to know it)

Thank you!
 
What languge are you translating from and to or vice versa.

Note to members, this is not a DIYer or how to question so keep that in mind with your replies.

Roger
 
opposite polarity meaning dc or ac but if something is 1/4 inch away it should not be shorting at all. so it means keep anything live away from anything conductive or it will short if its any closer than by a 1/4 inch its up to ul to say that is ok.
 
electricalperson said:
maybe dead means grounded. im willing to bet thats what it is. grounded parts like the cabinet panelboards are mounted in and stuff like that
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flyingcat2008 said:
The spacing between field wiring terminals of opposite polarity and the spacing between a field wiring terminal and a grounded dead metal part shall be least 1/4 inch when short-circuiting or grounding of such terminals results from projecting strands of wire.
HI, everyone!
I don't know if it is appropriate to ask this question here, but I really need help for I didn't found a better answer in good search.
In electric, what is dead metal? It means this metal is insulated?(I am doing a ul related work,so I really want to know it)

Thank you!
Click to expand...


I was thinking that too till I re-read it.

Maybe "dead" is not part of an electrical system. So many ways to go w/ this:-?:-?
 
It is a redundant word. A common, "electrical slang" term for an energized wire is "live," so "dead metal" means "not live," or "not energized." But if a metal part is "grounded," it cannot be live. So saying "grounded, dead" is saying the same thing twice.
 
I agree with Charlie B.

Dead metal part is a metal part that is not energized and may be grounded or an isolated metal part, it would still be dead metal. In this case they said grounded dead metal part.
 
charlie b said:
It is a redundant word. A common, "electrical slang" term for an energized wire is "live," so "dead metal" means "not live," or "not energized." But if a metal part is "grounded," it cannot be live. So saying "grounded, dead" is saying the same thing twice.
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I disagree, grounded is not the same as de-energized, or dead. A grounded part may be energized.
 
zog said:
I disagree, grounded is not the same as de-energized, or dead. A grounded part may be energized.
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i agree with this. we think the neutral is dead because when we measure voltage from N to G it shows 0. same with a corner grounded delta measure phase to phase you get 480 measure grounded phase to ground and you get 0. im sure if you lift the ground connection you will see voltage :smile:
 
And once again I will look in my 40 year old electronics dictionary:

"dead"

Free from any electrical connection to a source of potential difference and from electric charge; having the same potential as that of earth The term refers only to current-carrying parts which are sometimes alive, or charged.
 
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