User's Manual
Table Of Contents
1027145–0001 Revision D
Installing IFL cables 5–5
Hub installation
1. Determine where the IFL cable will penetrate the roof.
Refer to the HT rooftop drawings.
Before you drill, consider these guidelines:
• Important: Do not penetrate any part of the building
structure without first making sure you have the explicit
permission of the customer and building owner.
• Horizontal penetration is preferable to vertical penetration.
(A horizontal hole is less likely to leak.)
• Take care not to destroy cabling or wiring under the roof or
inside the wall.
• Round penetration holes are preferred over square holes.
(They are easier to make and seal.)
2. Drill a 5–inch (127–millimeter) diameter hole at the
building penetration point.
Building
penetration
point
Building surface
5 inches
(127 millimeters)
hb085
5.4
Penetrating the roof