Broadband Applications & Construction Manual - Public - CommScope

Going Through an Exterior Wall
Survey the interior of the residence for the outlet location. Using a point of reference that is common to both the
inside and the outside (such as the lower corner of a window pane), measure the vertical and horizontal distances
to the center of the outlet location (example: 1.5 feet over and 1 foot down from the lower corner of the window).
Check again for obvious interference from electrical outlets, wall studs, plumbing,
etc. You may want to shut off any nearby electrical circuit, as accidental
contact with live service may result in a fatal shock.
From the outside, measure from the reference point and drill a thin pilot hole
at a slight upward angle to prevent water from later seeping in through the
hole. If you are going through masonry, use a masonry bit and drill through the
mortar, not the brick. If the pilot hole checks out, enlarge the hole with a larger bit.
Insert a feed-thru bushing.
On the inside, cut the outlet opening in the drywall. Do not install
the bracket yet; the metal edges may damage the cable during
installation.
Set your A-frame or cable box at the ground block/NIU and pull
the cable with you to the entry point. Allow extra cable for running
through the wall as well as forming a 5 in (13 cm) drip loop. Use
cable clips to attach the cable to the foundation of the residence.
Pass the cable through the bushing and through the hole in the
drywall. Allow plenty of cable for termination. Form the drip loop
and place your last fastener. Seal the bushing with RTV silicone or
a similar weatherproof sealant.
Residential Interior Cabling 9.4
Going Through an Exterior Wall
tech tip:
use electrical
outlet boxes to
help find
wall studs;
they are
attached to
them