Chapter 4 _______________________________________________________________ Installation
VAISALA_______________________________________________________________________ 35
Site Preparation
Power Supply and Communication Lines
Before assembling the mast, the power supply and communication lines
must be available. The primary AC power service must comply with the
National Electrical Code (NEC) or equivalent specifications for
grounding the primary power service entrance. The AC (mains) power
must be continuous, 110–230 V/50 Hz, and without spikes and blackouts.
If the AC (mains) voltage is fluctuating more than the given tolerance
allows, the AC (mains) voltage stabilizers are recommended.
WARNING
All electrical installations must be carried by licensed experts as
governed by local and state authorities, legislation, and regulations.
The following applies to all field cabling:
- Use armored field cables.
- Cables must be suitable for underground use.
- Check the cable core diameter according to maximum allowable drop.
- Route the cables through conduits to the equipment.
- Check cable conduit diameters or use additional termination boxes.
- Ground the cable shield at both ends.
- Use spike and overvoltage protection devices at both ends of field
cables.
Always make a detailed cabling and wiring plan. Data transmission lines
from the outdoor sites to indoor devices have to be prepared carefully.
Also the power supply for the equipment used needs to be planned
carefully.
It is recommended that you use a conduit to protect the cables that
connect the indoor components to the outdoor components from damage
and moisture. Also traffic, standing water, and the twist and stress caused
by the connectors will damage the cables.
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