Box Connection

[mstrlucky74]

So if you have a NEMA 3R outdoor box how’s the connection from RGS conduit to the box made so it’s watertight. You need a special hub to install? Can just put threaded end of conduit through knockout with locknuts and bushing.

 

[jumper]

These are popular. myers hub.

 

[sameguy]

Pipe up to the bottom, sealing lock nut, hubs.

 

[Dennis Alwon]

We have used sealing locknuts

 

[charlie k.]

WOW. A quick look at Crouse Hinds or any other fitting website would of told you that.

 

[mstrlucky74]

WOW. A quick look at Crouse Hinds or any other fitting website would of told you that.

.
WOW!. I was told from someone that a hub was needed to provide a watertight seal and not a sealing locknut. Was just making sure.

And wouldn't the sealing locknut only keep the inside of the box watertight. Couldn't water seep though from the outside where the conduit penetrates the box?

 

[don_resqcapt19]

If you are using the factory KOs in a 3R enclosure, standard locknuts are fine.

 

[mstrlucky74]

If you are using the factory KOs in a 3R enclosure, standard locknuts are fine.

Why would the method/fitting differ if doing the ko's in the field? Thanks

 

[Dennis Alwon]

Why would the method/fitting differ if doing the ko's in the field? Thanks

I believe the factory Ko's would be at the bottom of the box and not on the top or sides

 

[gadfly56]

I believe the factory Ko's would be at the bottom of the box and not on the top or sides

Do 3R enclosures come with knockouts?!?

 

[mstrlucky74]

Not sure nema 3r come with ko's. But I imagine if they is the would be threaded for the rgs threaded end. We have 4-3" conduits entering box from bottom.

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[don_resqcapt19]

Why would the method/fitting differ if doing the ko's in the field? Thanks

Factory KO are located below any live parts. No idea where the field ones may be in relation to the live parts.

 

[don_resqcapt19]

Not sure nema 3r come with ko's. But I imagine if they is the would be threaded for the rgs threaded end. We have 4-3" conduits entering box from bottom.

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KOs never have threads.

 

[jumper]

Not sure nema 3r come with ko's. But I imagine if they is the would be threaded for the rgs threaded end. We have 4-3" conduits entering box from bottom.

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Knock outs are never threaded, just hubs.

Editon types quicker.

 

[follybeacher]

I think you're best answer is what does an AHJ expect and allow. Your field crew should have a good idea of these requirements.
Around here if its on the sides or top we use myers hubs. If it's on the bottom you can get away with locknuts.

 

[mstrlucky74]

KOs never have threads.

But small 4" octagon outdoor boxes have threads that rgs screws into.

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[jumper]

But small 4" octagon outdoor boxes have threads that rgs screws into.

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FS or FD box yes. But those are not knockouts, those are integral hubs.

What box/enclosure/cabinet are we talking about?

 

[gadfly56]

Do 3R enclosures come with knockouts?!?

OK, answered my own question. I looked at Eton's web site, and you can get 3R with or without knockouts, but only on the bottom panel.

 

[mstrlucky74]

OK, answered my own question. I looked at Eton's web site, and you can get 3R with or without knockouts, but only on the bottom panel.

But our drawings call for conduits to enter top and leave bottom.

 

[mstrlucky74]

FS or FD box yes. But those are not knockouts, those are integral hubs.

What box/enclosure/cabinet are we talking about?

A NEMA 3R say about 30". Guess it could come with concentric KOs. So I guess they would have to do a field KO and use meyers hub.