Is there such a thing pl?

Background is that I want to mount the receiver for another wireless
thermostat (after success with 2 aged relatives thanks to advice here).
The cable's all on the surface so I thought I could just use a pattress.
No go: the (industry standard) backplate is too small for that. It does
work with a metal 75 mm "back box" (ie the sort you plaster in for flush
mounting). But I can't find the surface mounting equivalent of that.
Some manufacturers refer to a "conduit box" but I've not found one in
plastic which is 75 mm as opposed to 86 or 87 mm and have square eyes
from looking.
--
Robin
reply to address is (meant to be) valid

On Tue, 16 Sep 2014 09:33:54 +0100, Robin wrote:

The cable's all on the surface so I thought I could just use a pattress.
No go: the (industry standard) backplate is too small for that. It does
work with a metal 75 mm "back box" (ie the sort you plaster in for flush
mounting). But I can't find the surface mounting equivalent of that.

I think you have fundemental misunderstanding. A stick it in the wall
box is as you say about 75 mm sq with accessory mounting holes at 60
mm apart. A surface box is about 88 mm sq but again with 60 mm spaced
accessory spaced mounting holes.

The surface box is bigger to match the size of the accessory plate,
flush boxes are smaller so that the accessory plate covers the edge
(gap) between box and wall material.

Also bear in mind that the front of a surface box is effectively the
same as the face of the wall. Just had a fiddle here with flush and
surface boxes and a "standard" thermostat plate can't see a problem
other than with some surface boxes the plate doesn't have much edge
to rest on to stop it dropping into the box.

--
Cheers
Dave.

On Tuesday, September 16, 2014 9:33:54 AM UTC+1, Robin wrote:
No go: the (industry standard) backplate is too small for that. It does
work with a metal 75 mm "back box" (ie the sort you plaster in for flush
mounting). But I can't find the surface mounting equivalent of that.

Could you link to the back box it does work with, as I'm not sure what you mean.

wild guess Is this of any use
http://www.paxton.co.uk/products.asp...up=group-05065

This is the MK box range
http://help.tradingdepot.co.uk/wp-co...3/03/BOXES.pdf

Owain

Also bear in mind that the front of a surface box is effectively the
same as the face of the wall. Just had a fiddle here with flush and
surface boxes and a "standard" thermostat plate can't see a problem
other than with some surface boxes the plate doesn't have much edge
to rest on to stop it dropping into the box.

The backplate dropping into the pattress (so the receiver cannot be
attached) is exactly the problem I had with the pattresses I had and
with all that Toolstation had in stock yesterday. I ran out of time
before I could cross the road to Screwfix.

And while this is a Danfoss I that Drayton (and some other brands
possibly the same factory) state explicitly "DO NOT use a surface
mounting box". I had assumed the reason for that was mechanical. Can
it possibly be electrical when they have cut-outs for cable clipped
direct to the wall??
--
Robin
reply to address is (meant to be) valid

Could you link to the back box it does work with, as I'm not sure
what you mean.

http://www.tlc-direct.co.uk/Images/P...ze_3/AP655.JPG


wild guess Is this of any use
http://www.paxton.co.uk/products.asp...up=group-05065

Thanks: that looks reassuringly like the piece of thin MDF I bodgered
this morning in order to cable to the backplate, mount the receiver and
check it all works


This is the MK box range
http://help.tradingdepot.co.uk/wp-co...3/03/BOXES.pdf

I hadn't seen anything in that which really suited. And I'm beginning
to think I need to make the trek[1] to a TLC-Direct counter and grovel.

[1] by London standards - it's over 8 miles!
--
Robin
reply to address is (meant to be) valid

If your wireless thermostat has mounting holes that match standard back boxes why not get a blanking plate drill a hole in the centre to pass your cables through from the surface box. Then simply mount your thermostat on top of the blanking plate passing the fixing screws through the thermostat through the blanking plate into the surface box, in effect clamping the blanking plate between the thermostat and the surface box but crucially providing a base against which your thermostat sits on. This will add about 7mm to how far the thermostat protrudes from the surface box, if the mounting screws end up a little short longer ones are available at your local DIY shed.

Richard

On Tuesday, September 16, 2014 1:19:17 PM UTC+1, Tricky Dicky wrote:
If your wireless thermostat has mounting holes that match standard
back boxes why not get a blanking plate drill a hole in the centre

Agreed, but some flex outlet plates have a front face knockout for cable exit which may be easier than smashing a plate.

Owain

"Robin" wrote in message
...
Is there such a thing pl?

Background is that I want to mount the receiver for another wireless
thermostat (after success with 2 aged relatives thanks to advice here).
The cable's all on the surface so I thought I could just use a pattress.
No go: the (industry standard) backplate is too small for that. It does
work with a metal 75 mm "back box" (ie the sort you plaster in for flush
mounting). But I can't find the surface mounting equivalent of that. Some
manufacturers refer to a "conduit box" but I've not found one in plastic
which is 75 mm as opposed to 86 or 87 mm and have square eyes from
looking.


Google "surface mounted metalclad switches".
They are the same size as standard switch frontplates, ie bigger than the
box for sinking in the wall.

On Tue, 16 Sep 2014 12:16:39 +0100, Robin wrote:

The backplate dropping into the pattress (so the receiver cannot be
attached) is exactly the problem I had with the pattresses I had and
with all that Toolstation had in stock yesterday.

Ah, thinking about how I solved this problem 10 years or so ago. I
used a double surface box, double blank plate (the thermostat was
about that size, bigger than a single). Fixed mounting plate to blank
plate, such that the thermostat was neatly positioned, using the
standard 60 mm holes. Drilled large hole for cables in appropiate
position. Normal mounting screws blank plate to surface box.

--
Cheers
Dave.