Earth Ground Installation
Important! The satellite surge protection components cannot properly function unless an efficient pathway to earth ground
is provided. The ground path must be as direct as possible, without sharp bends and must not exceed 30 ohms resistance
(when measured with an earth ground resistance test device). A resistance reading of 0–10 ohms is considered excellent,
11–20
ohms is acceptable and 21–30 ohms is considered marginal. All electrical components throughout the irrigation system
should be grounded in a manner which provides the same ground potential.
The following instructions depict one of several acceptable earth grounding methods. Due to variables in soil composition and
terrain, the method shown may not be suitable for your installation site. Contact your local Toro distributor for assistance and
availability of the required earth ground resistance test instrument. Recommended ground testers are: AEMC Instruments,
model 3710 clamp-on tester, or Biddle Megger, model 250260 (or equivalent).
Procedure
Figure 4
1.
Drive a 5/8" by 8' (17 mm x 2.4 m)
copper-clad steel rod into well moistened
soil not less than 8' (2.4 m) or more than
Chassis
Ground Lug
12'
ground rod should be 12" (30.5 cm) below
grade level. See Figure 4.
(3.7 m) from the satellite. The top of the
6
Solid Copper
Ground Wire
AWG (10 mm )
2
Valve Box
2.
Using a 5/8" (17 mm) clamp or “Cad weld”
fastener, attach a 6 AWG (10 mm ) solid
2
copper wire near the top of the ground rod.
Avoiding wire bends of less than 8" (20.3 cm)
radius and more than 90°, route the wire
through conduit into the controller cabinet.
Secure the wire to the large copper ground
lug. See Figure 4.
12"
(30.5 cm)
8" (20.3 cm)
Minimum
Radius
8'
– 12'
(2.4 m – 3.7 m)
90°
Note: Make sure the soil surrounding the
ground rod(s) remains well moistened at all
times. The addition of some form of irrigation
may be required if the satellite is installed in
a non-irrigated location.
Ground Wire To
Additional Ground
Rod(s) (Optional)
Copper-Clad
Ground Rod
3.
Measure the ground resistance per the
instructions provided with the ground test instrument. If the resistance exceeds the acceptable limit, additional ground
rod(s) can be installed at a distance equal to twice the buried depth of the first rod; i.e., 16' (4.9 m). Interconnect the
2
ground rods using 6 AWG (10 mm ) solid copper wire and test again. If the measured ground resistance continues to read
above the acceptable limit, contact your local Toro distributor for further assistance and recommendations.
Note: Installing a round valve box over the ground rod enables the ground rod to be easily located as well as providing
access to the ground wire connection(s).
Input Power Installation
Caution: When installing multiple controllers, polarity of the Line and Neutral connections must be properly main-
tained throughout the irrigation system. Reversed polarity may cause damaging potentials to exist at one or more
controller locations. An equipment ground wire from the power source must be connected to each satellite controller.
WARNING
AC power wiring must be installed and connected by qualified personnel only.
All electrical components and installation procedures must comply with all applicable local and
national electrical codes. Some codes may require a means of disconnection from the AC power
source, installed in the fixed wiring, having a contact separation of at least 0.120" in the line and
neutral poles.
The wire used for connection to the controller must have insulation rated at 105°C minimum.
Ensure the AC power source is OFF prior to servicing or connecting to the controller.
3
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
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| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
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| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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