Connecting An Earth Ground - Toro Custom Command 36 Station Manual Del Usaurio

CONNECTING AN EARTH GROUND

The surge protection components provided in the Custom Command
reduce the potential for surge damage by shunting induced high
voltage spikes to earth ground. Therefore, an important step in the
installation process is to properly connect the controller to an earth
ground source, especially if the controller is located in a lightning-
prone area.
Caution: The built-in surge protection components cannot
effectively protect the controller circuitry from power surge unless
properly connected to an earth ground source. The 5-year lightning
warranty will be void if proper earth grounding measures are not
completed as specified in the following procedure.
To connect an earth ground:
1. Remove one of the 3/4" (19 mm) knockouts provided in the
bottom of the cabinet for the ground wire connection.
2. Route a 6 AWG (10 mm
less than 8" [2.4 m] radius) from the earth ground device (copper-
clad rod or plate) to one of the controller ground lugs provided.
Refer to Figure 7 for additional installation recommendations.
3. Attach the wire to the ground device using a Cad-weld
connector (double or single lug ground clamps are not acceptable).
4. Measure the total resistance from the ground device to the
controller ground lug using a Megger
instrument.
Important: Obtaining a Megger resistance reading of
10 ohms or less is required.
Note: Installation of additional grounding devices may be required
to obtain 10 ohms or less resistance. An additional ground lug is
provided for this circumstance. Do not connect the two ground
wires to the same terminal.
If additional assistance is required to obtain proper grounding,
contact your Toro distributor or field service representative.
Installation Procedures
24
2 ) solid copper wire (avoiding wire bends
TM resistance measuring
TM