Electrical Requirements; Warning - Chamberlain Lift-Master Professional 1270 Owner's Manual

Installation Step 9

Electrical Requirements

To reduce the risk of electric shock, your garage
door opener has a grounding type plug with a third
grounding pin. This plug will only fit into a grounding
type outlet.
If the plug doesn't fit into the outlet you have,
contact a qualified electrician to install the proper
outlet.
To avoid installation difficulties,
do not run the opener at this time
If permanent wiring is required by your local code, refer to the following procedure:

WARNING

To prevent electrocution , remove power
from the garage door opener and from the
circuit you plan to use for the permanent
connection.
To make a permanent connection through the 7/8"
diameter hole in the top of the opener (according to
local code):
• Remove the opener cover screws and set the
cover aside.
• Remove the attached 3-prong cord.
• Connect the black (line) wire to the screw on the
brass terminal; the white (neutral) wire to the
screw on the silver terminal; and the ground wire
to the green ground screw. The opener must be
grounded.
• Reinstall the cover.
To avoid installation difficulties,
do not run the opener at this time
WARNING
To prevent electrocution or fire , installation
and wiring must be in compliance with local
electrical and building codes.
Right
• Do not change the plug in any way.
• Do not use a 2-wire adapter.
• Do not use an extension cord.
Ground Tab
Green Ground
Screw
Ground Wire
16
Wrong
Permanent wiring
connection
Black
Wire
White Wire
Black
Wire