Campbell Scientific ET107 Evapotranspiration Monitoring Station - Manual (Page 25)

ET107 Weather Station
FIGURE 2-5. Close up of ground rod and 4 AWG cable
2.2.3 Tower Grounding
2.2.3.1 Supplied Components
(1) 5 ft 4 AWG Ground Cable
(1) Copper Ground Lug, Bolt
(1) Ground Rod, Clamp
2.2.3.2 Grounding Procedure
Ground the tower as shown in FIGURE 2-4 and FIGURE 2-5.
1. Place the ground rod clamp on the ground rod. Secure it about 3 inches
from the top. Do this before the rod is driven into the ground. Be careful
not to damage the clamp with the hammer
2. Taking care not to damage power or communications lines, drive the
ground rod close to the foundation using a fence post driver or sledge
hammer. Drive the rod at an angle if an impenetrable hardpan layer exists.
Soften hard clay soils with water if necessary.
3. Strip 1 inch of insulation from both ends of the 4 AWG ground cable.
Strip 1 inch of insulation from the lower end of the 12 AWG ground wire.
Loosen the lug’s set screw and insert the 4 AWG and 12 AWG wire.
Tighten the set screw (FIGURE 2-5).
4. Loosen the ground rod clamp. Insert the 4 AWG wire. Tighten the clamp
(FIGURE 2-5).
4 AWG Wire
Ground Rod
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