Chamberlain RSL12UL Installation Manual page 16

Power wiring
1. Turn off the AC power from the main power source circuit breaker.
2. Run the AC power wires to the operator.
3. Unplug the transformer.
4. Remove the junction box cover.
5. Run the AC power wires through the knockout in the bottom of the
electrical box.
6. Connect the green wire to the earth ground rod and AC ground
using a wire nut. NOTE: The earth ground rod can be grounded to
the chassis.
7. Connect the white wire to NEUTRAL using a wire nut.
8. Connect the black wire to HOT using a wire nut.
9. Replace the junction box cover. Ensure the wires are not pinched.
10. Plug in the transformer.
11. Turn ON AC power to the operator.
INSTALLATION
AMERICAN WIRE
GAUGE (AWG)
18
16
14
12
10
NOTE: Use copper conductors ONLY.
16
MAXIMUM WIRE LENGTH
DIRECT PLUG-IN
TRANSFORMER (120 VAC)
1150 feet (351 m)
1850 feet (564 m)
2950 feet (899 m)
EXTERNAL PLUG-IN
TRANSFORMER (24 VAC)
150 feet (46 m)
250 feet (76 m)
400 feet (122 m)
600 feet (183 m)
1,000 feet (305 m)