![Cambium PTP 670 Series User Manual Download Page 316](http://html.mh-extra.com/html/cambium/ptp-670-series/ptp-670-series_user-manual_485665316.webp)
Chapter 5: Installation
Installing the copper Cat5e Ethernet interface
Page 5-19
Ground the main drop cable
At all required grounding points, connect the screen of the main drop cable to the metal of the
supporting structure using the cable grounding kit (Cambium part number 01010419001).
Install the bottom LPU to PSU drop cable
Install the bottom LPU
Install the bottom LPU, ground it, and connect it to the main drop cable.
1 Select a mounting point for the bottom LPU within 600 mm (24 in) of the building entry point.
Mount the LPU vertically with cable glands facing downwards.
2
Connect the main drop cable to the bottom LPU by following the procedure
3 Fasten one ground cable to the bottom LPU using the M6 (small) lug. Tighten both nuts to a
torque of 5 Nm (3.7 lb ft):
Locking nut
Washer
M6 lug
Washer
Nut
Toothed washer
M10 lug to ground
4 Select a building grounding point near the LPU bracket. Remove paint from the surface and
apply anti-oxidant compound. Fasten the LPU ground cable using the M10 (large) lug.
Maximum 600 mm
(24 inches)
Bottom LPU
Grounding system
Building
entry
point
LPU to grounding system
PSU drop
cable
PSU
AC supply
Network
terminating
equipment
PTP 670 ground cables
Power over Ethernet CAT5e cable
(gel-filled, shielded with copper-
plated steel)
Network CAT5e cable
Site grounding system