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powering workbenches #30547 10/22/03 01:02 PM
Joined: Feb 2003
Posts: 69
J
jbfan Offline OP
Member
We are relocating a rework center to our location and I am having trouble on how to wire these things up. In there current location, they are wired with SO cord and a twist lock recpt. mounted into a fiberglass ceiling panel. The old ceiling that is located here could not support the weight of 4 10' 4 conductor so cords hanging from them. There are 50 benches that have to be wired and they have to be able to move 2-3' according to the work they are doing. My first thought was to hang SO from the building, but 400-8 prevents this due to the hole in the suspended ceiling. Hard piping prevents them from moving the benches as needed without me have to disconnect them. Any and all ideas are appreciated.
Thanks
Keith


"Yes I am a Pirate, 200 years to late" Jimmy Buffett
Work Gear for Electricians and the Trades
Re: powering workbenches #30548 10/22/03 01:14 PM
Joined: Aug 2003
Posts: 1,374
R
Ryan_J Offline
Moderator
Is this a suspended ceiling? How about a 4 square box and t-bar bracket mounted fluch on the tile with a 1/4 all-thread up to the deck? If this is a possibility, install the receptacle in four square box and your done.


Ryan Jackson,
Salt Lake City
Re: powering workbenches #30549 10/22/03 02:42 PM
Joined: Apr 2002
Posts: 7,211
HotLine1 Offline
Member
JBFan:
A few similar situations here.....
We had a 2' x 2' alum panel fabricated to fit in the ceiling grid. We punched the panel to accept twistlock devices. On the "backside" an 18 x 18 screw cover box, with the bottom 16 x 16 cut-out. Greenfield (6') into the box with whatever circuits were required.
THe plate was clipped to the grid tee's, and support provided by threaeded rod to the z bars.

The above is in a vitamin mfg plant, and yes, it is "movable" to an extent.

The line equipment is relocated to accomodate whatever products they are running, and we have only relocated two panels since it was installed.

On a smaller scale the t-bar box should work fine for you, you may consider an additional means of support also.

John


John
Re: powering workbenches #30550 10/22/03 04:11 PM
Joined: Mar 2002
Posts: 86
S
straightedge Offline
Member
Like Ryan said,

Use the caddy t-bars to support your j-box between the ceiling grid and run a 1/4" all-thread from you j-box up to the building structure.

[Linked Image from erico.com]

Then you can use the twist lock scenario that you used before.

Tev

Re: powering workbenches #30551 10/23/03 08:17 AM
Joined: Feb 2003
Posts: 69
J
jbfan Offline OP
Member
Thanks for the ideas. That is the route I will take.
Keith


"Yes I am a Pirate, 200 years to late" Jimmy Buffett
Re: powering workbenches #30552 10/23/03 08:34 AM
Joined: Dec 2000
Posts: 4,283
electure Offline
Member
You might run some t-bar wire at about 45° angles from the Caddy bracket to the structure above. This will reduce the sway of the box when the cord is pulled or moved.
(In CA, we use lots of these wires for seismic bracing)...S


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