Innovative ideas for a changing world.

Installation according to Attema

Product Menu

1125: UHW50-BW / RD smokeproof hollow wall junction box

  • UHW50-BW / RD smokeproof hollow wall junction box

All benefits at a glance

  • Smokeproof Sa and S200
  • Soundproof
  • Up to 90 minutes fire resistant in an insulated wall.
  • Up to 60 minutes fire resistant in a non-insulated wall.
  • Tested on a non-load bearing wall construction with at both sides 2 x 12,5 mm plasterboards.
  • Combi conduit lead-in fitted with 2 conical conduit lead-ins with integral click connection for both 16 and 20 mm conduits, one of which is sealed with a knock-out.
  • Anchored firmly in the wall by the metal screw fastening plates with three threads.
  • No gap between the switch plate and wall due to the extremely thin, sturdy rim of the metal fastening sets.
  • Extra feed-through possibility for coupled boxes.


Trade Characteristics

Article:UHW50-BW / RD smokeproof hollow wall junction box
Packaging quantity:25 pcs

Technical Specification

Halogen free:Yes
Centre-to-centre distance of the holes to be drilled:71 mm
Internal depth:50 mm
Diameter of circle saw to use:76 mm
Conduit diameter:16 / 20 mm

Tips & Tricks

Hollow wall sockets the right centre distance:
A properly drilled hole has a positive influence on the mounting of the hollow wall box in the wall. Make sure you have the right centre distance (71mm) in case of coupled boxes.71

Extra Information

Click here for a test report smoke resistant HW junction boxes
Click here for testreport Peutz for hollow wall boxes – soundproof.
Click here for the installation manual inserts hollow wall boxes.