The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
Wow, that was close!
by jraef
11/28/16 07:06 PM
Earthquake in New Zeeland
by RODALCO
11/27/16 11:25 PM
Calling all Non-US members!! (Non-US only)
by Tjia1981
11/27/16 06:33 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 10
Texas_Ranger 8
Trumpy 8
sparkyinak 7
Who's Online
1 registered (LongRunner), 90 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#102281 - 12/26/05 06:43 PM Why switches,panel should be mounted on wood?
peterpang Offline
Member

Registered: 01/08/05
Posts: 19
Loc: toronto
Why switches,panel should be mounted on a piece of fireproof wood when against concrete or brick wall?

I can not find any related requirements in the code.

Can somebody help me?

Appreciate your answers,thanks.

Top
2014 / 2011 NEC & Related Books and Study Guides
#102282 - 12/26/05 10:15 PM Re: Why switches,panel should be mounted on wood?
u2slow Offline
Member

Registered: 09/18/03
Posts: 198
Loc: Salt Spring, BC, Canada
The salts found in concrete, and its ability to wick moisture will corrode the panel. I recall a discussion about this issue in 2nd-year school. I can't find anything in the CEC book though.

The 'fireproof' requirement may be referenced better in the Building Code. I have seen fire-resistant and painted regular plywood used for the purpose (perhaps fire rated paint satisfies the requirement?)

Top
#102283 - 12/27/05 07:45 AM Re: Why switches,panel should be mounted on wood?
Sandro Offline
Member

Registered: 12/30/01
Posts: 449
Loc: Stoney Creek, ON, Canada
We use plain plywood when mounting our stuff to concrete. No special treatments required. A few years ago, they required drywall in between the panel/switch and plywood, but last few years they eliminated that rule as the panels and switches are "enclosed" and supposed to suppress any fire. Hey, I don't write the codes, good enough for me.

Top
#102284 - 12/27/05 11:43 AM Re: Why switches,panel should be mounted on wood?
frank Offline
Member

Registered: 05/29/01
Posts: 361
Loc: windsor ontario canada
Interesting,we never use anything in industry.Bolt everything directly to concrete or block.To be honest Ive never looked for it in the code.Is it a damp location issue.The only time Ive seen wood is to have something to screw to for phone equipment etc.In not saying you don't need it.i just want to know the circumstances and where its applicable.Code rule # anyone
cheers

Top
#102285 - 12/27/05 04:49 PM Re: Why switches,panel should be mounted on wood?
Sandro Offline
Member

Registered: 12/30/01
Posts: 449
Loc: Stoney Creek, ON, Canada
Frank...yes, to clarify, for individual switches, we bolt directly to concrete/block. But typically, when we do a service from scratch, with main switches, mb, splitter, panels, etc. I like to use 1 or several 4x8 sheets of plywood. So much easier/faster screwing into wood.

Top
#102286 - 12/28/05 12:13 PM Re: Why switches,panel should be mounted on wood?
bigrockk Offline
Member

Registered: 01/25/03
Posts: 175
Loc: Middle of Canada
I have always used plywood to mount equipment wherever I am also using loomex to
wire (resi mostly). I work industrial now and it is the same as what Frank stated,everything straight on to the concrete or block.I have never taken fireproofing into consideration and have never had a violation for doing it this way.
Who knows maybe I have been missing something but I can't check for code rules as I am in a hotel in Winnipeg with no code book.(What was I thinking..lol)

Top
#102287 - 12/28/05 02:46 PM Re: Why switches,panel should be mounted on wood?
dougwells Offline

Member

Registered: 05/03/03
Posts: 1228
Loc: kamloops BC Canada
Speaking of Code Books when are they going to stop going up in price. The 2006 edition is going to be 135.00

And what they want for it on Disk is Just a money grab IMHO the last one was 295.00.
If a person buys the Code Book there should be a deal for the CD

[This message has been edited by dougwells (edited 12-28-2005).]

Top
#102288 - 12/28/05 04:56 PM Re: Why switches,panel should be mounted on wood?
bigrockk Offline
Member

Registered: 01/25/03
Posts: 175
Loc: Middle of Canada
At 135 bucks they should include a cd with the code book!

Top
#102289 - 12/28/05 05:01 PM Re: Why switches,panel should be mounted on wood?
peterpang Offline
Member

Registered: 01/08/05
Posts: 19
Loc: toronto
I guess it is a rule from the Canadian Building Code.I am not sure.

I realy want to see somebody clear this fuzzy wood,and tell us in what circumstance this fireproof wood must be installed.

Top
#102290 - 12/28/05 05:10 PM Re: Why switches,panel should be mounted on wood?
peterpang Offline
Member

Registered: 01/08/05
Posts: 19
Loc: toronto
295?!
I am thinking of buying PART I and PART II,so I have to pay maybe 500 bucks for these books?

[This message has been edited by peterpang (edited 12-28-2005).]

Top
Page 1 of 2 1 2 >



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals