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INTRODUCTION
EARTH GROUND ROD
To AVOID damaging gas, power or other underground utility
lines, contact underground utility locating companies BEFORE
digging.
Connect the metal housing and the circuit board's green wire to a
12 AWG minimum gauge solid ground wire.
Run the 12 AWG minimum gauge solid ground wire from unit to
suitable earth ground.
NOTE: Shield connections on boards should not be connected to
ground wire.
IMPORTANT: An earth ground rod is strongly recommended and
should be no further than 12 feet (3.7 m) from the unit and use a
minimum of 12 gauge wire in most cases. The type and length of
earth ground rods vary by region. Contact the building inspector's
offi ce in the municipality where you plan to install the unit for
correct grounding materials and installation procedures.
POWER WIRING
The 110 Vac outlet must be dedicated to the unit only. This outlet
should be wired back to its own circuit breaker. This will prevent
two problems:
• Other equipment cannot introduce spikes, noise, surges, or
dips into the power circuit.
• The system's operation will not be affected if any other
equipment develops a short circuit across the power line.
Wire the transformer provided with your system to the power
inputs using the correct wire size shown in the table below.
Connect the transformer into a 110 Vac outlet after all
connections have been made, any other type of outlet will cause
damage to the system.
POWER WIRE TABLE
DISTANCE
Under 30 feet (9.1 m)
30 - 75 feet (9.1 - 22.9 m)
75 - 150 feet (22.9 - 45.7 m)
150 - 250 feet (45.7 - 76.2 m)
250 - 500 feet (76.2 - 152.4 m)
NOTE: LiftMaster is not responsible for conflicts between the
information listed in the above table and the requirements of local
building codes. The information is for suggested use only. Check
local building codes before installation.
INSTALLATION
AC POWER WIRE SIZE
18 AWG
18 AWG
18 AWG
16 AWG
12 AWG
TEST
NOTE: Keep ground wire as
straight as possible.
12 feet (3.7 m) maximum
Check national
and local codes
for proper depth
Earth ground rod
11
SET UP
Ground wire
12 AWG minimum
Other ground sources within
12 feet (3.7 m) of access control panel
Ground to
metallic cold
water pipe
Ground to
existing
electrical
system
16.5 Vdc 2.5A,
Non-polarized
Power (included)
The EL1SS
MUST be
grounded.
Dedicated Outlet
Dedicated
Circuit
Breaker
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