Before you start the installation, check carefully the correct location and installation height of the air terminal.
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In pole masts, install the air terminal 30 cm (11.8 in) from the top of the mast to
leave room for other equipment needed at the top, such as wind sensors or obstruction
lights.
CAUTION To prevent equipment damage, install the air terminal so that its tip is as high above the sensors as possible. The air terminal provides a 45° protection zone. Extend the air terminal tip to a height where the protective zone covers the equipment on the mast. Figure 1. Air terminal position at top of mast 
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Position the air terminal bracket so that the mast down conductor and the other cables
can be routed down on the opposite sides of the mast.
Figure 2. Down conductor position on mast 
- 1
- Mast down conductor
- 2
- Equipment/Sensor cable