Jerseydaze
Senior Member
I have an existing building that is block with 3/4 fur strip .I plan to run RX but I am having a hard time finding a box that will accommodate switches and receptacles that is 1 1/4 deep nail on Anyone have suggestions?
3/4 fur strip Any Sudgestions?
- Thread starter Jerseydaze
- Start date
- Status
- Location
- Massachusetts
Yeah. get a big hammer and a demo hammer, blow out the block as needed.
We run into this a lot in apartments and assisted living buildings.
We run into this a lot in apartments and assisted living buildings.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Bob has given the only option when using furring strips.
goldstar
Senior Member
- Location
- New Jersey
- Occupation
- Electrical Contractor
Just curious, do you nail the NM cable to the side of the fir strip ? How do you hold the JB in place ? Metal or plastic ?
- Location
- Massachusetts
For us it usually MC cable and metal boxes.
Some sort of screw on cable support will be used to secure to the metal 'high hat' (strapping)
- Occupation
- Licensed Electrician
Ever have an endless flow of vermiculite come pouring out?
Caddy makes a strap call CJ that holds mc inch and a quarter away from the strip.
- Location
- Massachusetts
Not since I tried to cut in a box on an outside wall of a two story block wall. Yeah ... a big pile. :rant:
Yeah Caddy CJ-6 we use them but they are pretty weak at keeping the cables under control.
goldstar
Senior Member
- Location
- New Jersey
- Occupation
- Electrical Contractor
I've used these before on 2x3's laid flat with a shallow 4" sq. JB and a raised cover :
http://multimedia.3m.com/mws/media/41178O/3mtm-cable-stackers-si-1-and-sifs-1.PDF
They claim you can use them on fir strip but you would still have to bust out the block to allow the wire to enter.
http://multimedia.3m.com/mws/media/41178O/3mtm-cable-stackers-si-1-and-sifs-1.PDF
They claim you can use them on fir strip but you would still have to bust out the block to allow the wire to enter.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
You would need to space the cable at least 1.25" away from the edge of the strip. IMO furring strips is a lousy way to build out block walls if you want boxes behind the drywall.
- Location
- Massachusetts
- Occupation
- Licensed Electrician
- Location
- New Jersey
- Occupation
- Journeyman Electrician
I am impressed, you waited 9 posts to say that.
I certainly don't have a problem chopping in boxes if that's what they want but I find it pretty silly to chop a bunch of holes in a perfectly good block wall.
JFletcher
Senior Member
- Location
- Williamsburg, VA
goldstar
Senior Member
- Location
- New Jersey
- Occupation
- Electrical Contractor
That's great but it's a remodel box and it won't fit in a 3/4" firred wall.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
Never seen one that fits in 3/4 inch space.
I agree with why chop up perfectly good blocks in most cases.
Unless you only have one or two boxes to set in such a wall - tell the owner, builder or whoever that it will cost them less to just use 1.5" fur strips then your labor will be to carve out all the masonry for you to get your stuff in there.
These boxes are deeper than you think. They will not work in a 3/4" furred out wall.
- Location
- Massachusetts
No, that will not fly, not in the places we do. They are not going to loose space permanently just to make the electricians life easier.
goldstar
Senior Member
- Location
- New Jersey
- Occupation
- Electrical Contractor
I think it goes beyond making an EC's life easier. I think it's a case of going cheap and dirty up front and then trying to do the same on the tail end. We're talking about another 3/4" all the way around the room. I can understand not wanting to pay a carpenter to rip out the fir strip and install std. studding. What I have trouble with is that they are willing to pay an EC to bust out the block rather than pay a carpenter to install another layer of strip on top of the existing.
- Location
- Massachusetts
OK lets look at the other direction.
You are the guy paying the bills, what reason would you have to spend more money buying more material and giving up space when the electrician can put the devices in strapped wall if they just work a bit harder?
As far as it 'just being 3/4" around the room' ... in the buildings I work in that is going to add up to a lot of inches overall.
- Status