Can’t remove light switch socket backplate
Ask questions and find answers to many subjects relating to electrics and electrical work

3 posts   •   Page 1 of 1
diycow
Labourer
Labourer
Posts: 1
Joined: Mon Oct 31, 2022 1:03 pm

Can’t remove light switch socket backplate

by diycow » Mon Oct 31, 2022 1:15 pm

Hi. I’m trying to replace a light switch and have to remove the back plate as it’s an old style that doesn’t fit the new switch (although box dimensions are the same.)

The old back plate has a pipe containing the electrical cable that is screwed into the back plate, which is preventing me from removing it.

Does anybody know to remove it?
Attachments
IMG_0923.jpeg

Mr White
Project Manager
Project Manager
Posts: 1302
Joined: Tue Jun 20, 2017 10:54 pm

Re: Can’t remove light switch socket backplate

by Mr White » Mon Oct 31, 2022 7:59 pm

That "Pipe" is conduit. It usually has a coupler screwed onto the end. (Which sits just above the back box) then there is usually a brass bush that screws into the coupler. You undo the bush, which releases the old back box, and install the new box, but the new box will not line up with the old one, you will have to make the hole for the back box bigger. I don't see a brass bush or coupler, must be very old.

Alternatively fit a surface patress over the existing box and put your switch onto this
Attachments
Back box
Back box
backbox.JPG (23.08 KiB) Viewed 686 times
Coupler
Coupler
coupler.JPG (8.52 KiB) Viewed 686 times
This is a brass bush
This is a brass bush

ericmark
Project Manager
Project Manager
Posts: 2848
Joined: Fri Oct 02, 2009 9:49 pm
Location: Llanfair Caereinion, Mid Wales.

Re: Can’t remove light switch socket backplate

by ericmark » Mon Oct 31, 2022 10:30 pm

Not seen a back box like that for years, the back box is threaded so needs to remove the conduit away from wall to be able to unscrew box.

Personally I would cut up the old box with a multi-tool, or use some other botch to fit new box. Only seen those boxes used where the wall is not plastered and the conduit is surface.

3 posts   •   Page 1 of 1
It is currently Tue Feb 20, 2024 4:04 am