Help, I have sunk a 35mm knockout backbox into my brick wall and made it flush with the plaster. Unfortunatley the socket will not go into the backbox due to the boses behind the screw holes, sitting on the backbox screw lugs. When I went back to S/F we tried another socket in another backbox but just the same. Any advice much appriciated chaps. Thanks. Hope you can understand this.
All these fancy slimline, screwless, flush, etc face plates can be tricky to fit and can easily catch you out and change your 5 minute simple job into something much longer and stressful. Often requiring a deeper box than a standard white faceplate Couple of options I can think of; Set back box a little deeper..is this feasible, even if you've decorated, shouldn't cause too much damage to wall surface or Drill through lug holes and make pilot hole in back of box, both sides, in-line with lugs and switch plate Remove back box lugs or just bend flush with box Use a threading tool to cut thread in back box pilot holes (M3.5) Using longer screws, 50mm probably, screw faceplate into back box (ensure any additional screw length can pass through box and into holes in wall) Job done mate http://www.screwfix.com/p/c-k-rethreading-tool-m3-5x-6/59312
OP has fitted a 35 box and face plate wont fit this, 25 mm isn't gonna help him Don't think its the box depth issue (although a screwless skt in a 25 box is gonna be tight to maybe impossible, especially if 2 cables on a ring) I think he's set the box right flush with the wall, not usually a problem, but some of these flat plates/ screwless have a sort of riveted fitting behind the screw hole that holds the switch and plate together. This can sit on the lugs and push the socket forwards slightly
Thanks for all the answers guys. I had thought of tapping new holes in the bottom of the box. Is the distance from top of backbox to the top of the lugs different on 25mm deep to 35mm deep ? Oh just got it, I think, Set the 25mm box deeper this will set the screw lugs deeper, yes. Thanks chaps.
Single socket ? If it's a single box with top & bottom lugs that are in the way, bend them back and out of the way with a good clout.