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

>> Home   >> Electrical-Photos   >> Classifieds   >> Subscribe to Newsletter   >> Store  
 

Photo of the Week:

100 Year old Lightbulb
100 Year old Bulb

Advertisement:-Left
Recent Gallery Topics:
What in Tarnation?
What in Tarnation?
by timmp, September 10
Plumber meets Electrician
Plumber meets Electrician
by timmp, September 10
Who's Online Now
0 members (), 163 guests, and 24 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#118497 09/22/04 07:15 AM
Joined: Oct 2000
Posts: 3,685
Likes: 4
Admin Offline OP
Administrator
Member
Quote
Thought you might get a kick out of this one. I'm doubtful that the Canadian code allows for wire to be buried in concrete, sans conduit, especially in a very very damp location (Vancouver, Canada).

- Derek L.
[Linked Image]

Horizontal Ad
#118498 09/22/04 08:05 AM
Joined: Jul 2002
Posts: 8,443
Likes: 4
Member
Good Lord!.
It makes you wonder what the rest of the cable looks like, inside the concrete.
The chemicals in concrete aren't usually that kind to PVC. [Linked Image]

#118499 09/22/04 09:49 AM
Joined: Nov 2000
Posts: 2,148
R
Member
Mike,
Quote
The chemicals in concrete aren't usually that kind to PVC.
I've never heard that before. The most common underground installation in my area is concrete encased PVC conduit.
Don


Don(resqcapt19)
#118500 09/22/04 10:41 AM
Joined: Jul 2002
Posts: 8,443
Likes: 4
Member
Don,
The type of PVC that is used for rigid conduit, is an un-plasticised version of Poly-Vinyl-Chloride.
The type used for wires and cables has a plasticiser added to it, to make it more flexible.
It is this plasticiser, that the acidic content of the concrete reacts with.
There are also forms of plasticiser that react with sunlight too and some overhead lines here have been known to lose thier insulation.

#118501 09/22/04 12:27 PM
Joined: Nov 2000
Posts: 2,148
R
Member
Thanks Mike.
Don


Don(resqcapt19)
#118502 09/23/04 05:00 AM
Joined: Jul 2003
Posts: 394
B
Member
Nice custom in-use cover also!

#118503 09/23/04 12:11 PM
Joined: Oct 2003
Posts: 172
G
Member
All the conduit is for in concrete is a raceway,if after the cement sets the conduit rots away or disintegrates no matter you have the channel and you must pull a ground.

Horizontal Ad
#118504 09/23/04 02:50 PM
Joined: Dec 2001
Posts: 2,505
T
Member
A guy from germany once told me the Mexican way of resi wiring. Put a greased garden hose into the concrete walls while pouring them. After it's set pull out hose and reuse. Then pull THHN into the resulting cavity. No ground, just a jumper wire N-G at every receptacle.


Link Copied to Clipboard
Advertisement:-Right


Tools for Electricians
Tools for Electricians
 

* * * * * * *
2023 National Electrical Code (NEC)
2023 NEC + Exam Prep Study Guides Now Available!
 

Member Spotlight
electure
electure
Fullerton, CA USA
Posts: 4,295
Joined: December 2000
Top Posters(30 Days)
Popular Topics(Views)
340,808 Are you busy
266,179 Re: Forum
247,119 Need opinion
New Page 2
Powered by UBB.threads™ PHP Forum Software 7.7.5