Chase nipple ul listed for Bonding

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AC\DC

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EC
inspector said " prove a tapered shoulder of a chase nipple is UL listed for grounding"
This is what I have
1663.pdf
I am locked out of my Iq for UL looks like 514b address this issue from what I can gather online, but most spots I go want me to buy the book.
 
I have a rv pedestal to small panel for a tap I did to feed the pedestal.
From pedestal to panel is were I am using the nipple as a bond.
I could just install an EGC but I don't want to lol.
 
From the UL Guide Information for "Conduit Fittings (DWTT).
All metal fittings for metal cable, conduit and tubing are considered suitable for grounding for use in circuits over and under 250 V and where installed in accordance with the NEC, except as noted for flexible metal conduit fittings and liquid-tight flexible metal conduit fittings.
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The conduit fittings under DWTT are listed to UL 514B
 
He told me he does not think since it has a beveled edge that it bits enough into the metal. Ill have to call UL Monday since I am locked out of my account for some reason. Properly lack of login lol
 
How is the edge of a chase nipple any different than the edge of an EMT connector, MC connector, or FMC connector? An MC connector doesn't bite into the metal either but that is suitable to bond the MC cable. This inspector sounds like a dope. :rolleyes:
 
AC\DC said:
He told me he does not think since it has a beveled edge that it bits enough into the metal.
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Only one lock-nut needs to do that, just like with any connector.

Not that I consider the shoulder to be a bevel.

Added: What Rob just said.
 
I actually like the inspector, He cool if I challenge him and does not get forceful. I just got to find the document for him. Thanks though for verifying.
 
AC\DC said:
I actually like the inspector, He cool if I challenge him and does not get forceful. I just got to find the document for him. Thanks though for verifying.
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As far as I know all connectors and chase nipples are UL listed for bonding so I'm wondering why you have to prove this?
 
infinity said:
How is the edge of a chase nipple any different than the edge of an EMT connector, MC connector, or FMC connector? An MC connector doesn't bite into the metal either but that is suitable to bond the MC cable. This inspector sounds like a dope. :rolleyes:
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A little nazi finding minute issues to pick over. You keep him busy on next inspection. Some of us will sneak over & let the air out of his tires. 🤡
 
AC\DC said:
inspector said " prove a tapered shoulder of a chase nipple is UL listed for grounding"
This is what I have
1663.pdf
I am locked out of my Iq for UL looks like 514b address this issue from what I can gather online, but most spots I go want me to buy the book.
Click to expand...
AC\DC said:
I have a rv pedestal to small panel for a tap I did to feed the pedestal.
From pedestal to panel is were I am using the nipple as a bond.
I could just install an EGC but I don't want to lol.
Click to expand...
So there are two metal enclosures butted together that the chase nipple and a lock ring are providing a raceway for? I would question if there is an effective ground also.
 
TwoBlocked said:
So there are two metal enclosures butted together that the chase nipple and a lock ring are providing a raceway for? I would question if there is an effective ground also.
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Hmm. What if it was a nut and bolt? :unsure: I'm not disagreeing with you, just exploring.
 
LarryFine said:
Hmm. What if it was a nut and bolt? :unsure: I'm not disagreeing with you, just exploring.
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Recently saw something much like that. Was checking some control wiring voltage to the din rail and got some weird readings. Looked for the ground to the backplane. A nut, bolt, terminal ring, and star washer were used. Only this was through a hole that included the plastic wire trough. The bolt went through drilled metal, but the star washer was against the plastic. For giggles I read the resistance - 2 megs. You need something that bites through any paint. A lock ring will do so. A chase nipple, I wouldn't count on it. We ran a ground wire to a din rail screw.
 
TwoBlocked said:
You use an EMT connector between two boxes, like the EMT connector is in one box and the locking ring is in the other? That is how the OP is using the chase nipple I believe.
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My question is how is a chase nipple between two boxes any different than an EMT connector into a box? Both have a locknut on one side and the shoulder of the fitting against the other side.
 
infinity said:
My question is how is a chase nipple between two boxes any different than an EMT connector into a box? Both have a locknut on one side and the shoulder of the fitting against the other side.
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The difference, as I see it, is the locking ring bonds the threaded portion to the box. The coupling portion does not bond to the box. When you go into a box with an EMT coupling, that box is bonded with the locking ring. But when you go through two boxes butted together, only the box that has a locking ring is effectively bonded. And that only to the coupling. So what would the chase nipple itself be bonded to? One of the two boxes and nothing else.
 
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