User's Manual

Table Of Contents
10 Lightning Protection
228
10.4 LPU Recommended Configurations
This section contains diagrams to show how the components of PTP 600 sites are installed
and connected. The diagrams cover the following configurations:
Typical mast or tower installation
Typical wall installation
Mast or tower installation with E1/T1
Wall installation with E1/T1
Mast or tower installation with GPS Sync Box
Wall installation with GPS Sync Box
Mast or tower installation with GPS Sync Box and E1/T1
Wall installation with GPS Sync Box and E1/T1
The recommended standard components for protecting installations are:
Screened CAT 5e cable, also known as Shielded CAT 5e or CAT 5e STP (Shielded
Twisted Pair)
Surge arrestor, type PTP-LPU: 4 or 8 per link (2 or 4 Motorola Kits Part Number
WB2907AA)
Grounding stake
Grounding cable: minimum size 8 AWG, preferably 6 or 4 AWG
RJ45 screened connectors
There may be a local regulatory requirement to cross bond the CAT 5e cable to the mast or
tower at intervals as regular as every 10 metres (33 feet). This can be achieved using an
Andrew grounding assembly type 223158 or similar.
Where an installation already has, or requires the use of a Master Ground Bar then the
requirements of Motorola Specification R56 "STANDARDS AND GUIDELINES FOR
COMMUNICATION SITES" (68P81089E50) take precedence over those in this guide.
NOTE: If a coaxial (or other) cable is already cross-bonded to the mast or tower, the same
cross bonding points on the mast or tower must be used for the CAT 5e cable.
Additional components are listed under each diagram where required. The recommended
cables are specified in Section 3.3.5 “Cables and connectors”.