Using nipple between meter socket and disconnect

[Dansos]

We are installing a 200A meter socket directly on top of an existing 200A disconnect. I plan on using a 3” galv close nipple to run the wires through. If the top of the disconnect has a hub knockout on top of it, is a hub required for the nipple to thread into? I wanted to have the meter socket almost directly on top of the disconnect so it will be within PoCo’s height requirements... I know 2-3” isn’t gonna make or break this but I just want to know if using a hub is REQUIRED by NEC for this application.
Thank you

 

[Dansos]

PS the meter socket will be fastened to the building with strut. It will not be “resting” on the disconnect in any way

 

[growler]

If the top of the disconnect has a hub knockout on top of it, is a hub required for the nipple to thread in to.

If this is a wet location I would assume a hub would be needed.

How are you going to keep the water out with a close nipple?

 

[electrofelon]

A hub is not specifically required, but some water tight means, such as a sealing locknut is. This is for the top of the disconnect, not the bottom of the meter socket.

 

[Dansos]

Thank you. I guess I figured the meter would be so close to the disconnect it wouldn’t matter but now I see your point.

 

[Dennis Alwon]

If there is a place for a hub I don't know how you would do this without using a hub.

 

[infinity]

You need something beyond a standard locknut. If there are no concentric or eccentric KO's you can use a single sealing locknut as electrofelon suggested with a close nipple.