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#205671 - 03/21/12 08:44 AM Mast / Hub connection
Willie Offline
New Member

Registered: 03/20/12
Posts: 7
Loc: BC Canada
Hi to all, I'm a newbie and enjoy following this forum. Most of my work is commercial but currently am doing a small residential 200 Amp service with a through the roof mast kit. My question is about the connection between the 2 1/2 inch mast and the meter socket hub. As supplied by my electrical supplier, the pipe is not threaded and slips over the hub and is held in place by a set screw. Is this screw the only thing, besides the mast clamps, that holds the mast to the hub ?? Thanks to all who reply. This is a Canadian project.

Edited by Willie (03/21/12 08:45 AM)

2014 / 2011 NEC & Related Books and Study Guides
#205672 - 03/21/12 08:52 AM Re: Mast / Hub connection [Re: Willie]
twh Offline

Registered: 03/11/04
Posts: 895
Loc: Regina, Sask.
On top of the socket is an internally threaded piece that most of us call a hub. A mast adaptor is screwed into that, either as one piece or with a close nipple. The top of the mast adapter has a set screw to hold the mast.

#205673 - 03/21/12 09:17 AM Re: Mast / Hub connection [Re: Willie]
Willie Offline
New Member

Registered: 03/20/12
Posts: 7
Loc: BC Canada
Thanks........back to work now

#205677 - 03/21/12 02:26 PM Re: Mast / Hub connection [Re: Willie]
dougwells Offline


Registered: 05/03/03
Posts: 1226
Loc: kamloops BC Canada
The mast is unthreaded, i think the screw is for bonding purposes


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