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#107457 - 09/22/04 05:15 AM Buried in Concrete
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Registered: 10/07/00
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Loc: NY, USA
 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.

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#107458 - 09/22/04 06:05 AM Re: Buried in Concrete
Trumpy Offline

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Registered: 07/05/02
Posts: 8540
Loc: SI,New Zealand
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.
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#107459 - 09/22/04 07:49 AM Re: Buried in Concrete
resqcapt19 Offline
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Registered: 11/10/00
Posts: 2209
Loc: IL
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
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#107460 - 09/22/04 08:41 AM Re: Buried in Concrete
Trumpy Offline

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Registered: 07/05/02
Posts: 8540
Loc: SI,New Zealand
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.
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#107461 - 09/22/04 10:27 AM Re: Buried in Concrete
resqcapt19 Offline
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Registered: 11/10/00
Posts: 2209
Loc: IL
Thanks Mike.
Don
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#107462 - 09/23/04 03:00 AM Re: Buried in Concrete
Big Jim Offline
Member

Registered: 07/18/03
Posts: 377
Loc: Denver, CO USA
Nice custom in-use cover also!

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#107463 - 09/23/04 10:11 AM Re: Buried in Concrete
GETELECTRIC Offline
Member

Registered: 10/22/03
Posts: 178
Loc: toronto canada
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.

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#107464 - 09/23/04 12:50 PM Re: Buried in Concrete
Texas_Ranger Offline
Member

Registered: 12/17/01
Posts: 2343
Loc: Vienna, Austria
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.

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