® ET2000e IRRIGATION CONTROLLER INSTALLATION
making
since 1986
ater work
Grounding Instructions
NON-LIGHTNING PRONE AREAS
Stand Alone System:
• Stand alone systems in non-lightning prone
areas require no ground rod. The case of
the controller must be grounded from the
conduit nipple of the transformer to earth or
safety ground in accordance with the local or
National Electrical Code.
• Stand alone systems are defined as
individual controllers installed and
connected only to valves and sensors. If
multiple controllers are connected together
in any way, such as but not limited to
sharing Master Valves, Flow Meters, or
communications, this is not a stand alone
system. The only exception is that stand
alone controllers may share the same AC
power line wiring.
Central Communications or Shared Systems
(Non-Stand Alone):
• Install one 5/8 inch by 8 foot grounding rod
per irrigation controller (see diagram). Do
not connect multiple controllers to the same
ground rod. The top of each rod must be
installed inside of a 10 inch round valve box.
If a pedestal is being mounted, the ground
rod may be installed through the pedestal
base. The ground rod should be installed as
close as practical to the controller. Under no
circumstances shall the rods be shortened.
• Use brass clamps specifically designed to
secure the copper wire to the grounding
rods. Sand both the rod and the inside of the
clamp to remove all oxide from the contact
surfaces.
• Connect a #6 AWG solid copper wire from
the copper rod to the field common (white
wires in the black harness) of the controller.
WARNING:
Never connect the ground rod or the white wire
(field common) to the Black wire (Flow return) of
the black wiring harness. This will disable the over
current protection, and could result in damage to
the controller. There should be no kinks or sharp
bends in the wire.
LIGHTNING PRONE AREAS
All Systems, Stand Alone and Central
Communications systems:
• Install one 5/8 inch by 8 foot grounding rod,
one TP-1 Transient Protection Board, and
one TP-110 Surge Protector per irrigation
controller (see diagram). Do not connect
multiple controllers to the same round rod.
The top of each rod must be installed inside
of a 10 inch round valve box. If a pedestal is
being mounted, the ground rod may be
installed through the pedestal base. The
ground rod should be installed as cose as
practical to the controller. Under no
circumstances shall the rods be shortened.
• Use brass clamps specifically designed to
secure the copper wire to the grounding
rods. Sand both the rod and the inside of the
clamp to remove all oxide from the contact
surfaces.
• Connect a #6 AWG solid copper wire from
ground lug of the TP-1 to the copper rod.
There should be no kinks or sharp bends in
the wire.
• As an alternate to clamping, each wire may
be wrapped around the rod and brazed in
place. Braze the wire to the rod for at least
one circumference of the rod.
Lightning Warranty
• This standard warranty will be extended to
cover lightning damage if the controller and /
or central system is installed in accordance
with our installation instructions for each
item installed, the National Electrical Code,
and these grounding instructions.
CHANGE 1 12 March 2007
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