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Old 01-30-2015, 07:18 PM   #21
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Originally Posted by mcclary's electrical View Post
Enough threads? Nobody mentioned explosion proof.
When I asked nobody mentioned it wasn't... Not to mention the strength of one thread engagement vs more... Most sealing locknuts I've seen take up at least two threads...

Last edited by glen1971; 01-30-2015 at 07:23 PM.
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Old 01-30-2015, 07:30 PM   #22
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[quote=John Valdes;1610073]Don, Once again the forum will not allow me to quote you. ...
Putting the lock nut on the connector threads first, then screwing the connector threads into the switch body, then tightening the lock nut up against the outside of the switch body. Is this what you mean?
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Exactly.
[quote[I can see no reason to do this as I install the connector first and tighten it well.
In this case, the lock nut does absolutely nothing except possibly lock the connector in place? Whats the reasoning?
It is rare that you can point the 90 or 45 degree connector in the correct direction and still have a tight connection, so in those cases I use the locknut to hold it tight. It often bottoms out short of where I want it to point, and backing out a 1/2 turn or more leaves a loose connection. Most of these are in areas that could get wet and so I use a sealing locknut to keep it pointed correctly and keep the water out.
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Old 01-30-2015, 07:33 PM   #23
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Originally Posted by Borgi View Post
Finally! That's a very important question!

More specifically, is this in a hazardous location? If so what class and division?

Borgi
You can't use a LFMC connector that is directly screwed into an enclosure that is required to be explosion proof.
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Old 01-30-2015, 08:19 PM   #24
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Originally Posted by don_resqcapt19 View Post
You can't use a LFMC connector that is directly screwed into an enclosure that is required to be explosion proof.

From what I've seen, they're approved for use in Class I Div II, and Class II/III locations.
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Old 01-30-2015, 08:29 PM   #25
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Originally Posted by don_resqcapt19 View Post
You can't use a LFMC connector that is directly screwed into an enclosure that is required to be explosion proof.
The post by mcclary just reminded me to ask if this was in a hazardous location. Didn't mean to imply that an explosion proof enclosure was needed.

Hope I am saying that correctly.

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Old 01-30-2015, 08:41 PM   #26
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At my last job I wired industrial machinery and it was company policy to use sealing washers on every connector that wasn't in a non-threaded opening.
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Old 01-30-2015, 08:46 PM   #27
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I'm REALLY going the Hawks win, but I'd be scared to bet that way. ....lol
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Old 01-30-2015, 10:15 PM   #28
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Old 01-30-2015, 11:51 PM   #29
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why are the threads tapered if they aren't for threaded hubs?
In general the male threads on connectors are not tapered threads, they are straight threads.
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Old 01-30-2015, 11:54 PM   #30
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From what I've seen, they're approved for use in Class I Div II, and Class II/III locations.
I said that they can't be used with an enclosure that is required to be explosion proof. I said that because an enclosure that is required to be explosion proof will need a seal fitting between the enclosure and the liquid tight flexible metal conduit. Class II and III enclosures and many Class I, Division 2 enclosures are not required to be explosion proof.
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Old 01-31-2015, 12:13 AM   #31
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Originally Posted by don_resqcapt19 View Post
I said that they can't be used with an enclosure that is required to be explosion proof. I said that because an enclosure that is required to be explosion proof will need a seal fitting between the enclosure and the liquid tight flexible metal conduit. Class II and III enclosures and many Class I, Division 2 enclosures are not required to be explosion proof.
I see what you're saying now. Confusion on my part. My apologies.
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Old 01-31-2015, 01:04 PM   #32
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Originally Posted by just the cowboy View Post
I have put the locknut on the outside when the connector would thread too far into the switch and be in the road of the connectors
I have never had an issue with NEMA style switch bodies as the threaded hub is quite deep.

Quote:
Originally Posted by don_resqcapt19 View Post
It is rare that you can point the 90 or 45 degree connector in the correct direction and still have a tight connection, so in those cases I use the locknut to hold it tight. It often bottoms out short of where I want it to point, and backing out a 1/2 turn or more leaves a loose connection. Most of these are in areas that could get wet and so I use a sealing locknut to keep it pointed correctly and keep the water out.
Yes, I see and to be very honest, I never worried to much about aiming and holding position as once the conduit was inserted and tightened, it would not move enough to worry about.
Thanks.
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Old 01-31-2015, 05:58 PM   #33
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Originally Posted by don_resqcapt19 View Post
In general the male threads on connectors are not tapered threads, they are straight threads.
I looked into that and appleton/oz-gedney supply them with npt threads and using them in threaded hubs is in the product description. I haven't used any other kind in so long I forgot they came with straight threads!
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