Specific Requirements For The Odu - Motorola PTP 800 User Manual

Grounding and lightning protection
Basic requirements
The following basic protection requirements must be implemented;
x
The equipment (ODU or antenna) must be in 'Zone B' (see
Protection Zones
x
A lightning protection unit (LPU) must be installed at the entry point to the
building or equipment room. The use of the LPU provided in the lightning
protection kit (WB3657) is strongly recommended.
x
The IF cable must be bonded to the supporting structure in order to prevent
lightning creating a potential between the structure and cable, which could
cause arcing, resulting in damage to equipment.
x
The IF cable must be grounded at the building entry point.
x
The CMU chassis bonding point must be grounded.
x
All grounding cables must be no less than 16mm
stranded, tinned and/or jacketed copper conductor.
Routing, fastening and connecting
When routing, fastening and connecting grounding cables, the following
requirements must be observed:
x
Grounding conductors must be run as short, straight, and smoothly as
possible, with the fewest possible number of bends and curves.
x
Grounding cables must not be installed with drip loops.
x
All bends, curves and connections must be routed towards the grounding
electrode system, ground rod, or ground bar.
x
Grounding conductors must be securely fastened.
x
Braided grounding conductors must not be used.
x
Approved bonding techniques must be used for the connection of dissimilar
metals.

Specific requirements for the ODU

The following ODU protection requirements must be implemented:
x
The distance between the ODU and LPU should be kept to a minimum; it is
recommended that the cable supplied in the accessory kit be used.
x
The IF cable length between the ODU and LPU must be less than 800mm.
x
The top LPU should be mounted lower than the ODU.
x
The ODU and top LPU should be bonded together with the 800 mm long
16mm
2-8
on page 2-6).
2 #
, 6AWG cable supplied in the accessory kit.
Chapter 2 Planning considerations
Lightning
2, #
or 6AWG in size, solid or
phn-1478_005v000
Apr 2010