Vaisala AWS330 - Manual (Page 39)

Chapter 4 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 37
- The equipment grounding system and lightning protection grounding
system should be located as far as possible from each other. The
minimum recommended distance is 5 m (16 ft.). Due to this, the
lightning rod grounding cable is routed down from the top of the mast
via the guy wire which is isolated from the mast construction; refer to
number 2 in Figure 4 below. The equipment grounding should be done
near the mast block as illustrated in the figure.
1012-200
Figure 4 Location of Grounding Rods and Optional Grid,
Arrow Points to Mast Tilt Direction
The following numbers refer to Figure 4 above:
1 = Lightning protection grounding rod
2 = Guy wire block of the isolated guy wire 3
3 = Mast
block
4 = Optional grounding rod
5 = Optional
connecting cable
6 = 5-meter minimum distance between the rods
7 = Equipment
grounding rod