Understanding Steel Building and Bonding

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Twoskinsoneman

Twoskinsoneman

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Location
West Virginia, USA NEC: 2020
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Facility Senior Electrician
If you have a situation where you have a steel building it is my understanding that this cannot be used as an EGC...Is this correct?

There is no situation where the structure can serve as the EGC...is this right?
 
Jhaney said:
check out 250.52 (A)(2)
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That is describing what is required for building steel to be used as a grounding electrode.

Building steel can not be used as an equipment grounding conductor, it is not one of the items listed in 250.118.

Chris
 
Jhaney said:
Raider,

Your absolutely correct I looked in the wrong area. I will flog myself later
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Careful to much of that and Chris will have to make the guys head on his avatar twice the size it is now. :smile:
 
raider1 said:
That is describing what is required for building steel to be used as a grounding electrode.

Building steel can not be used as an equipment grounding conductor, it is not one of the items listed in 250.118.

Chris
Click to expand...

Which part of 250.118 allows us to use a steel box as an EGC?
 
acrwc10 said:
Careful to much of that and Chris will have to make the guys head on his avatar twice the size it is now. :smile:
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If I make his head any bigger he won't be able to headbang.:D

Chris
 
Twoskinsoneman said:
Which part of 250.118 allows us to use a steel box as an EGC?
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Ok let's try this again, take a look at 250.136(A) the last sentence. Here is what it says:

"The structural metal frame of a building shall not be used as the required equipment grounding conductor for ac equipment."

Chris
 
raider1 said:
Ok let's try this again, take a look at 250.136(A) the last sentence. Here is what it says:

"The structural metal frame of a building shall not be used as the required equipment grounding conductor for ac equipment."

Chris
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Crystal clear. Thanks
 
don't overlook 250.116 FPN "Where extensive metal in or on buildings may become energized and is subject to personal contact, adequate bonding and grounding will provide additional safety."........even though it cannot be used as the required EGC.
 
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