Creating Drill Holes - OBO Bettermann UG 46-GS Mounting Instructions

6 4
Note!
Note!
UP Flush-mounted boxes

Creating drill holes

The holes for the flush-mounted boxes are created using a countersink
machine or drill with the appropriate drill bit for the masonry to be drilled
through. A centring tip must be used for better guidance. The drilling
diameters are 68 or 82 mm for single boxes, if the bayonet locks are not
removed. For double boxes, two holes are drilled and the cavity chiselled
out. The rectangular hole for the flush-mounted electronic boxes must
be chiselled out or milled. The same applies for the flush-mounted outlet
box.
The centre spacing between two adjacent or superimposed flush-mount-
ed boxes must be 71 mm, so that devices and cover frames can be
mounted appropriately.
If the drill hole is drilled wider than the socket, then there is more space
for tolerance compensation. The drill hole should be drilled to be
5–10 mm deeper than the concealed box, in order to provide escape
space for the plaster.
Fig 10: Draw on the drill holes with the drilling template
1. Draw on the drill holes, ensuring a standardised horizontal or vertical
alignment.
Mounting
7 1
m m
7 1
m m
17 | EN