Listed use of a liquidtight connector

[bennie]

Re: Listed use of a liquidtight connector

Unless the connector has a tapered thread, it will not be approved for connecting to a raintight box. This is the reason for withdrawing the listing for EMT raintight connectors.

It was not for the gland fitting connecting the EMT to the connector, It was the connector being connected to the threaded fitting.

Simply stated; The raintight connectors are raintight, but not wrench tight to the box.

 

[iwire]

Re: Listed use of a liquidtight connector

OK

 

[don_resqcapt19]

Re: Listed use of a liquidtight connector

Bennie,
So you are saying that a threaded EMT connector can never be used with a conduit body or box with a threaded boss?

Unless the connector has a tapered thread, it will not be approved for connecting to a raintight box. This is the reason for withdrawing the listing for EMT raintight connectors.

I don't think so, because the "raintight" rating was also removed from the compression EMT couplings.
Don

 

[Guest]

Re: Listed use of a liquidtight connector

What if you put a sealing locknut on the EMT RT connector before you screw it in to the Rigid coupler?

Just checking.

I know that if you put an EMT connector into a Rigid coupling it never really cinches (per Bennie).

 

[bennie]

Re: Listed use of a liquidtight connector

All straight threads are for locknut installation only.

This is the reason for the locknut being part of the fitting. If they were for threaded fittings, they would not have the locknut furnished. Manufacturers will not furnish a component that may be thrown away.

The UL listing retraction was for the continuity of grounding method, not for any problems with being raintight.

 

[curt swartz]

Re: Listed use of a liquidtight connector

Bennie

All of the compression fitting I have seen are still UL listed but not for raintight applications. If the reason for the listing change was for grounding continuity why are they still being sold as listed fittings? Are you suggesting that these fittings have a good grounding continuity if used in dry locations but not wet locations?

 

[don_resqcapt19]

Re: Listed use of a liquidtight connector

Bennie,
It was only the "raintight" part of the listing that was lifted, not the grounding part.
UL statement
Don

[ September 21, 2003, 07:30 PM: Message edited by: don_resqcapt19 ]

 

[bennie]

Re: Listed use of a liquidtight connector

You are correct Don. I should have wrote; straight threads have never been approved for threaded fittings.

All raintight boxes have threaded hubs. The physical dimensions of standard internal and external American pipe threads show there is not a tight mating of surfaces unless the pipe has a taper.

 

[don_resqcapt19]

Re: Listed use of a liquidtight connector

Bennie,

I should have wrote; straight threads have never been approved for threaded fittings.

So we can never use a EMT connector with a conduit body or box with a threaded hub????
Don

 

[bennie]

Re: Listed use of a liquidtight connector

I don't have the website address anymore concerning the loop impedance tests of conduit and fittings. The straight threads did not pass the test. Taper threads do pass if wrench tight.