I'm trying to pinpoint the exact code requirements between the NEC, UL508, and UL508A that requires the use of the plastic Panduit rivets to attach non-metallic wireway to a surface. I called Panduit and they didn't even seem to have an answer. The Panduit product number is Nr1-m for the rivet. I used these a lot when building natural gas panels for hazardous locations, but nobody was ever able to tell me where in the code it stated that I had to use this specific product vs another type of fastener. Any insight would be greatly appreciated. Thank you.
Panduit rivet requirements.
- Thread starter Josh 2036
- Start date
- Status
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
There is no code requiring these rivets. The use of them is strictly a design issue.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
The rivets are faster to install over drilling and tapping. You just drill and use the tool to push the rivet in. And its non metallic.
That's actually the other thing I was trying to look into. I'd like to know exactly how that part of the code is worded
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
I don't recall I have ever seen language on this in the NEC, keep in mind where I used the panduit rivets was in UL508 control panels. I don't have a copy of UL 508A. NEC does not apply to wiring in control panels.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
When I built UL508A panels, I used self drilling/tapping screws that had a very large diameter head (truss head?). I also used them to attached my DIN rail.
I've always used 8-32 screws, drilled and tapped, for panduit and DIN rail and relay bases, etc. (sometimes with a nut as well)
Never had any problems after building various types of panels, mostly for classified locations, on & off for 30 years.
Never had any problems after building various types of panels, mostly for classified locations, on & off for 30 years.
I was taught 10-32, but the practice is still the same. I just for the life of me figure out exactly people would want the rivets....
Carultch
Senior Member
- Location
- Massachusetts
Electrically, it's 2 thread depths to establish electrical continuity, and both fasteners with the same thread pitch will accomplish this equally well in the same base material. Mechancially, #10-32 will get you 15% more thread strength and 34% more fastener strength.
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
Ul508a specifically allows for the use of rivets to attach things to panels. However, there is no requirement in Ul508a to even use wire duct.
Wire duct use is not governed by the electrical code because it is not part of a chapter 3 wiring method.
One of the advantages to the plastic rivets is the ease of installing them and removing them if needed. They are also a little sloppy fit so the duct can be shifted around a little if needed.
Wire duct use is not governed by the electrical code because it is not part of a chapter 3 wiring method.
One of the advantages to the plastic rivets is the ease of installing them and removing them if needed. They are also a little sloppy fit so the duct can be shifted around a little if needed.
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