User's Manual

PMP 400/430 and PTP 200/230 Series Motorola PMP Solutions User Guide Supplement
Issue 6.0 May 2011 Page 61 of 77
Procedure 4: Cabling and Grounding/Earthing the AP
1. Standard Canopy installation practices apply, including using shielded
Ethernet cable for all infrastructure cabling, using drip loops, providing extra
cable for future use at any termination, and ensuring the tower or structure
is fully grounded (Protective Earth – PE).
2. Use dielectric grease (which is uniformly non-conducting) on all
connections and in all RJ-45 Ethernet connectors. The best practice is to
use enough grease to fill the RJ-45 female connector, and then insert the
RJ-45 male connector and push the grease further into the Canopy unit and
around the RJ-45 connector. Excess grease can be wiped over the
connector area to provide some resistance to water ingress around the
connector.
3. Use a 600SS surge suppressor within 3 ft (~1 m) of the AP and ground it to
known good ground (Protective Earth - PE) on the tower or support
structure with a 10 AWG ground strap.
4. A pole mount kit is available for mounting the 600SS to the tower or mast.
The mount includes a termination point for the ground strap from the
600SS.
5. Run a 10 AWG ground strap from the ground lug on the AP (see
Figure 31)
to known good ground (Protective Earth - PE) to complete the grounding
and protection of the AP. The termination point on the 600SS pole mount kit
may be used for this.
Figure 31: Ground lug highlighted on AP
The PMP 400/430 AP and PTP 200 Series BH have metal-to-metal contact from the tower or
support structure, through the antenna, through the coax cable, to the radio. Installing surge
suppression at the AP is strongly recommended to provide the best protection from near lightning
hits.