Installation Guide

2
SF-12P-277 with Magnetic Dimming
Ballast
Installation
1. TURN OFF POWER at fusebox or circuit
breaker. Wiring with power on can result in personal
injury or product damage. Damage caused by wiring
with power on will void the warranty.
2. Wire connectors supplied can be used to join one
10-, 12-, 14-, 16-, or 18-gauge wire with one or two
12-, or 14-gauge wires. Wire connectors are suitable
for use with copper wire ONLY.
Strip wallbox wires to the following lengths:
1/2" for 10, 12, and 14 gauge wire
5/8" for 16 and 18 gauge wire
3. Using wire connectors supplied, make
connections following the appropriate wiring
diagrams for your combination of controls and
ballasts.
4. Carefully push and form wires into wallbox while
keeping wire connectors toward the top and bottom
corners to allow room for the dimmer backcover. Do
not pinch wires.
5. Mount dimmer to wallbox using screws provided.
Unit MUST be mounted vertically.
6. Turn power ON.
7. For magnetic ballasts ONLY:
Adjust minimum light intensity as follows:
a) Run lamps at full intensity (slider at top position)
for 15 minutes to warm ballasts.
b) After 15 minutes push slider to low intensity
position.
c) Locate thumbwheel adjustment (shown in Package
Contents and Part Identification on page 1).
d) Rotate the thumbwheel to raise or lower minimum
light intensity. Proper minimum light intensity is set
when lamps do not flicker or drop out.
For Lutron electronic ballasts ONLY:
This unit is factory-calibrated and does not normally
require low-end light adjustment when used with
Lutron FDB or ECO-10 electronic ballasts. If lamps
flicker or drop out at minimum dimming level there
may be an installation error or the low-end light level
may need to be reset. Continued use of the system in
this mode will cause premature lamp failure. If this
condition exists, call the Lutron Technical
Assistance Hotline at: 1-800-523-9466.
1/2" or 5/8"
SF-12P-277 with two lamp ballast
Red
Dimmer
Hot
Neutral
277VAC
60Hz
Ground
Green or
Bare
White
Yellow
Black
Lamp
Magnetic Dimming Ballast
*
* Lamp
Disconnect
Socket
White
Black
Red
Red
Yellow/Blue or Brown
Blue
Red
Dimmer
Hot
Neutral
277VAC
60Hz
Ground
Green or
Bare
White
Yellow
Black
Lamp
*
* Lamp
Disconnect
Socket
Blue/White
White
Black
Red
Red
Yellow/Blue or Brown
Lamp
*
Yellow
Yellow
Blue
Magnetic Dimming Ballast
SF-12P-277 wallbox wiring
White
Yellow
Neutral
Hot
Switched Hot
Black
Red
Control
Ground
Green or Bare
SF-12P-277 with one lamp ballast