Electrical panel mounting - steel backer?

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  #1  
Old 01-25-15, 05:18 PM
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Electrical panel mounting - steel backer?

Hi All,

I live in an area in Ontario infested by termites. My home is especially bad, with the panel mounted on plywood, the plywood has been eaten by termites. Is there anything in the electrical code that prevents me from using a metal backer plate?

I'm looking to use something that the termites won't eat. I'm open to other options or mounting suggestions.

Thanks, Ivan
 
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  #2  
Old 01-25-15, 05:55 PM
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Commercially it is common to mount panels on Unistrut so I'd say just put Unistrut horizontally across the studs on either side.
 
  #3  
Old 01-25-15, 06:44 PM
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I can't really bring the panel out far enough to hit the studs, right now it's mounted on wood, then against the concrete wall. 1/2 plywood spacer between wall and main plywood backer, so about 1" off the wall. I can bring it out maybe one more inch with the play in the pvc supply conduit.

Thanks, Ivan
 
  #4  
Old 01-25-15, 07:12 PM
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Fasten the Unistrut to the concrete wall. Then Unistrut fasteners in the rail to mount the panel.

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  #5  
Old 01-25-15, 07:14 PM
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This solves the panel mounting problem, what about dressing the wires? Right now they are stapled to the wood.

Thanks, Ivan
 
  #6  
Old 01-25-15, 07:29 PM
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Can you post a picture so we have a better idea of what you have. http://www.doityourself.com/forum/li...rt-images.html
 
  #7  
Old 01-25-15, 07:32 PM
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I think you really need to get the termite problems under control before you lose more of the house.

The cables could be strapped to another unistrut above the panel.
 

Last edited by ray2047; 01-25-15 at 08:59 PM. Reason: trapped>strapped
  #8  
Old 01-25-15, 08:34 PM
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I became a termite exterminator and treated the soil all around my home, including the soil beneath the footings. Every piece of wood that must touch concrete (joists, etc) is treated prior to replacement. Where wood is not necessary (basement non-load bearing walls for instance) I have opted for steel.

I'm winning...but I just never want to be in here again.

I'll try to grab some pictures and upload them, but appreciate the feedback so far.
 
  #9  
Old 01-26-15, 10:28 AM
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I can't seem to upload pictures, I go to add a picture, select my file, and it says uploading, and then it fails..is there any particular format that the pictures should be in?

Thanks, Ivan
 
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Old 01-26-15, 10:32 AM
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Old 01-26-15, 10:40 AM
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Pictures need to be jpeg, gif,or ping. Try to keep the width under 900px. Or just post to a image hosting site such as Photobucket and place the link here. (tinypic*com is blocked.)
 
  #12  
Old 01-26-15, 11:27 AM
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Ah, ok.

Here's my panel:

http://i.imgur.com/jQyj3Sg.jpg

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A mud track where some plywood attached to the wall used to be:

http://i.imgur.com/XHk1Pig.jpg

A piece of the plywood (attached to the wall for 32yrs, by my estimates 15+ of those have had termite activity)

http://i.imgur.com/z3GL74b.jpg

The plywood attached to the wall isn't the direct cause of the termite damage to that wood, they actually tracked all the way up the floor along the wood to the panel. The left side of the panel shows no damage where it attaches to the wall because it did not have a piece of wood going to the floor. However, I would still like to minimize the direct wood-concrete contact.
 

Last edited by ray2047; 01-26-15 at 11:48 AM. Reason: Add panel image.
  #13  
Old 01-27-15, 06:45 AM
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What happened? Where is the panel enclosure?

Did the termites eat the steel box?
 
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Old 01-27-15, 09:50 AM
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Part of the front cover is removed in the picture, that is all.
 
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Old 01-27-15, 10:23 AM
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Looks different than any panel I saw seen here in the States.
 
  #16  
Old 01-27-15, 10:35 AM
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Not sure how popular they are here, most available now are longer. I think it's a Westinghouse panel, but takes cuttler-hammer breakers.

Thanks, Ivan
 
  #17  
Old 01-27-15, 06:07 PM
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When I look more closely I do see the panel box. I thought at first the panel interior was just mounted on the plywood.
 
  #18  
Old 01-29-15, 07:57 AM
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Now that I have posted the picture, does unistrut still seem like the best fit?

Does anyone know in southwestern ontario (KW/London area) where I can buy unistrut? Lowes/Rona/Home Depot don't seem to carry it.

Also, Since I'll be working with the panel I thought about fishing the wires out of the joists, and bundling them together into a 1.5" PVC conduit clamp below each joist. Is this permissable by code in Ontario?

Thanks, Ivan
 
  #19  
Old 01-29-15, 08:09 AM
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Unistrut is pretty much the go-to standard for commercial & industrial electrical panel mounting. I'm surprised you didn't find it at the large retailers. An electrical supply house should probably be your next stop.

No on the Romex bundling. It has to be supported through the framing members and can't be bundled up too tightly to prevent overheating.
 
  #20  
Old 01-29-15, 08:18 AM
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Oh interesting on the framing members, is stapling to the joist still permitted? I see the only difference in the conduit clamps is the bundling, and I would have thought that if heat buildup were a concern, there would be other issues.

Heating of the wire due to overcurrent to the point that it compromises the insulation of itself or nearby wires is a serious concern, I would have thought wiring gauge would be derated enough to prevent this.
 
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