Rain Bird WS-PRO2, Installation, Operation, Maintenance And Troubleshooting

Page: 19 / 64

WS-PRO2 Weather Station Manual
GT
27176
Page 19 of 61
3.1.2 Weather Station Grounding
3.1.2.1 Supplied Components
(1) 5 foot 4 AWG Ground Cable
(1) Copper Ground Lug, Bolt
(1) Ground Rod, Clamp
Refer to Section 2 for components supplied by installer.
3.1.3 Tower Grounding Procedure
Ground the tower as shown in Figure 12.
1. Place the ground rod clamp on the ground rod which is a part of the
three rod grounding grid. 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 using a fence post driver or sledge hammer.
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. Install the tower grounding lug to the tower base with
the 7/16 bolt provided (Figure 12). Loosen the lug's set screw and
insert the 4 AWG and 12 AWG wire. Tighten the set screw.
4. Loosen the ground rod clamp. Insert the 4 AWG wire. Tighten the
clamp (Figure 12).
3.2.0 Wiring Valve Access Box
At the base of the Weather Station and as near to the base as feasibly
possible, dig a hole large enough to install a standard 18” x 24”
rectangular valve box and cover. The valve box shall accommodate all
wiring connections, one rod of a 3-rod grounding grid, MGP-1 grounding
plate assemblies and MSP-1 surge arrestors.
3.3.0 Weather Station Power Wiring
Furnished as part of the Weather Station, is a 120VAC to 16VAC power
transformer. This transformer can be located in the pedestal of a field
satellite controller that is in the near proximity of the weather station or
some other convenient weather proof location.
Install the transformer in a 4”x 4” metal electrical box with cover. Connect
the 120VAC power wires of the transformer to a source of 120VAC power