ROUTING ELECTRICAL CABLES

bauerjan · Posted: Fri Mar 02, 2007 8:26 pm Post Subject: ROUTING ELECTRICAL CABLES

I WISH TO RUN CABLE VERTICALLY IN A PLASTERED CONCRETE WALL. PLASTER THICKNESS IS NOT SUFFICIENT TO ACCEPT CABLE WITHOUT IT PROTRUDING.

CAN I USE AN ANGLE GRINDER TO CUT A CHANNEL IN THE CONCRETE?

MANY THANKS

JAN

Steve · Posted: Fri Mar 02, 2007 8:32 pm Post Subject:

stop SHOUTING

And yes you can channel the concrete, as long as its not more than a quarter of the brick / concrete thickness if i remember rightly.

stevesey · Posted: Fri Mar 02, 2007 8:51 pm Post Subject:

Crafty wrote:

stop SHOUTING

Well he is abroad

Spark123 · Posted: Fri Mar 02, 2007 8:58 pm Post Subject:

Be prepaired for a divorce too, if you use a grinder on concrete it creates a bit of a mess too!! (OK, a bit of a mess is probably putting it a bit lightly)

Steve · Posted: Fri Mar 02, 2007 9:00 pm Post Subject:

I was going to suggest a hosepipe to dampen the dust, but this would probably have the same end result . . . divorce.

securespark · Posted: Fri Mar 02, 2007 9:01 pm Post Subject:

Crafty wrote:

I was going to suggest a hosepipe to dampen the dust, but this would probably have the same end result . . . divorce.

Hose down the missus if she gets hot-headed...

__________________
As George Michael once said, "..if you're gonna do it, do it right, right?"

Mascard · Posted: Fri Mar 02, 2007 10:40 pm Post Subject: What about back boxes

Sorry to piggy back off of someone else

but it is an appropriate place to ask what about back boxes ?

The average brick is 10cm thick and even the shallow back boxes are 25mm, so a 35mm back box or a 47mm cooker box will easily be more than a quarter of a brick thick.

Once again sorry for the piggy back but I would be interested to know.

thanks

FredFlintstone · Posted: Sat Mar 03, 2007 9:32 am Post Subject: Re: What about back boxes

Mascard wrote:

Sorry to piggy back off of someone else

but it is an appropriate place to ask what about back boxes ?

The average brick is 10cm thick and even the shallow back boxes are 25mm, so a 35mm back box or a 47mm cooker box will easily be more than a quarter of a brick thick.

Once again sorry for the piggy back but I would be interested to know.

thanks

Yes, but you'll probably have at least 12mm of plasterwork on that brick so you're only sinking the box 23mm into the brick.

davelx · Posted: Sat Mar 03, 2007 9:36 am Post Subject:

The regulation refers to cable chases, not to cutouts for back boxes.

The cut out for a back box is not very wide or high, so will not significantly weaken a wall even if it is 50% of the depth - after all, you can take a full brick out of a wall for an air vent with no problem.

A chase for a cable, on the other hand, will run for a significant portion of the height or width of the wall, and cutting it too deep will weaken the structure.