mbrooke
Batteries Included
- Location
- United States
- Occupation
- Technician
What does that mean?
There was a happy no head emoji on this site, and they took that away
What does that mean?
I appreciate you finding this code to discuss.
Reading this, it seems to me the EGC to the fixture would provide the path to ground in case of a fault. My interpretation would be that this ceiling isn’t likely to become energized by something other than the fixtures, which again, are grounded.
Any thoughts on that?
Sent from my iPad using Tapatalk
I can see the guy going up to patch the roof with his aluminum ladder getting zapped by voltage that wouldn't have been there if it wasn't bonded.I remember Mike a while back saying that without a bond there was absolutely no way something could become energized, but by running a copper wire and connecting it to anything metal you now risk the possibilty of energizing that metal.
It seems to me I recall a code requirement that prohibits the electrical within x# of inches of a metal roof structure. That would if complied with limit the chance of incidentally energizing the roof panels.Personally I feel that 'likely to become energized' applies if there are fixtures mounted on or near the ceiling or cables run on or near the ceiling (being vague with the 'near').
NM cable run tucked to the metal is at risk from panel edges or fasteners, for example, and such a panel should be bonded IMHO.
But if there is nothing to energize the panel, then why bond?
Jon
I can see the guy going up to patch the roof with his aluminum ladder getting zapped by voltage that wouldn't have been there if it wasn't bonded.
I think the reasoning for "if likely to become energized" criteria is that there would be a circuit associated that would trip if a fault to the metallic material was to occur rather than just random NEV.
Here in NY, NYSERDA which approves and provides PV incentives requires metal roofing to be bonded. They are not the AHJ, and the inspectors don't require it, but NYSERDA can withhold your $$$$. ( I think it is silly).Check the local building code . In Ohio the OBC has a requirement in the electrical section to bond metal veneer on structures.
That refers to the emoji of a smiling face shaking head no. It is not on the default emoji menu under the new software.What does that mean?
I've spoken to a couple of installers who are finding themselves stuck between the code and NYSERDA. If they install per code as you say they call it and withhold the funding, if they install per NYSERDA it's a code violation.Here in NY, NYSERDA which approves and provides PV incentives requires metal roofing to be bonded. They are not the AHJ, and the inspectors don't require it, but NYSERDA can withhold your $$$$. ( I think it is silly).
Then we should also require that metal ladders be bonded before use.I can see the guy going up to patch the roof with his aluminum ladder getting zapped by voltage that wouldn't have been there if it wasn't bonded.
I've spoken to a couple of installers who are finding themselves stuck between the code and NYSERDA. If they install per code as you say they call it and withhold the funding, if they install per NYSERDA it's a code violation.
Not referencing the roof as that issue but other points NYSERDA inspector is calling.What is the code violation to bonding metal roofing? While I agree that it isn't required in most situations, I don't see doing so as prohibited.
-Jon
I’m working on a cook shed for a friend; the ceiling is tin with recessed lighting.
He told me today the inspector had mentioned something about bonding the tin.
Is there an NEC requirement for this?
![]()
Sent from my iPhone using Tapatalk
Barring any local amendments, there are no code requirements to bond a tin roof. JMHO and then some.I’m working on a cook shed for a friend; the ceiling is tin with recessed lighting.
He told me today the inspector had mentioned something about bonding the tin.
Is there an NEC requirement for this?
![]()
Sent from my iPhone using Tapatalk
I have never done it but my old boss 45 years ago talked about bonding aluminum siding on houses at the corners
Worst I've encountered is 120V to earth on a mobile home metal siding.I’ve worked on houses with energized aluminum siding .
Sent from my iPhone using Tapatalk
120v to center point of xfmr?Worst I've encountered is 120V to earth on a mobile home metal siding.
No, literal earth. Dirt. Ground. One probe into dirt and other onto metal siding. Soil was very moist. Isolated issue to one circuit and turning that off voltage disappeared.120v to center point of xfmr?