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2. Down Conductor Installation Guidelines
Bare or tin-plated copper conductor is recommended for use as the down
conductor. The route of the down conductor should be as set out in the
original design. Ensure no structural changes have been implemented.
The use of copper conductor is recommended, with a cross sectional
area of not less than 50 mm². Tin-plated copper is recommended for its
corrosion resistance.
The copper should be of a grade normally used for commercial electrical
work. Do not use insulated coaxial cable.
The most direct path to ground is recommended, avoiding sharp bends.
Minimize the number of bends and use the most direct route to the ground
possible.
Ensure recommended bend radius is maintained, never less than 20 cm.
DO NOT double the down conductor back against itself after changes of
direction (i.e. 180° bend).
The down conductor should be installed as close (flush) as possible to the
metal tower.
If the down conductor has to cross other services make sure it crosses at
right angles using a conduit that extends at least 1m past either side of the
existing service.
Suitable fasteners should be installed to secure all down conductors. Down
conductors should be fastened on the basis of one point per meter. Avoid
trip hazards
Each down conductor should be connected to the grounding system.
The Warning Labels supplied with TerraStreamer
®
ESE Terminals should be
installed in locations where personnel may be in close contact to the down
conductor(s).
Down Conductor
Do not exceed minimum
bend radius.
Mast
Mast Base
Fastener
Roof Edge
Fig. E
- Down Conductor Routing Detail
