1
Pre-Installation
1.
Determine the number of dimmers to be ganged in the
same wallbox. If installing a single dimmer in a switchbox,
continue to the "Single Unit Installation" section on page 3.
2.
If more than one dimmer is being ganged in the same
wallbox, side sections can be removed to fit in existing
switchboxes. When controlling magnetic ballasts, breaking
side sections off the dimmer will reduce the maximum
number of lamps per dimmer. Use the following charts to
determine the maximum number of lamps per dimmer.
These products are covered under one or more of the following U.S. patents:
4,663,570; 4,894,587; 5,001,386; 5,041,763; 5,055,742; 5,173,643; 5,224,029 and
corresponding foreign patents. U.S. and foreign patents pending. Lutron, Hi-lume,
and Nova are registered trademarks and Eco-10 is a trademark of Lutron Electronics
Co., Inc.
1997 Lutron Electronics Co., Inc.
Installation Instructions
Please Leave for Occupant
Fluorescent Dimmers
NF-10, NF-20, NF-30
120VAC, 60Hz
NF-10-277, NF-20-277
277VAC, 60Hz
Package Contents and Part Identification
Control
Mounting
Screws
Slider
Faceplate
5 Wire
Connectors
Control
Shaft
Screwdriver
Important Notes
Please Read Before Installation
Switchbox and Location: A single-gang switchbox (3"
high x 2" wide x 2
1
/
2
" deep) will service all individual Nova
dimmers. These dimmers are designed to operate in
ambient temperatures from 0
o
C (32
o
F) to 40
o
C (104
o
F).
Allow a minimum space of 4
1
/
2
" above and below the
dimmer for proper heat dissipation.
Short Circuit Check: Check new installation for short
circuits prior to installing dimmer. With POWER OFF,
connect incoming neutral to the white wire, and the hot
wire to both ballast input wires (black wire with brown wire
or yellow/blue wire or orange wire, depending on ballast
used). Turn power ON. If lights do not work, or breaker
trips, a short is present. Correct the wiring and check
circuit again. Install dimmer only when short is no longer
present. This check should be done by a qualified
electrician.
Sockets: Use only with rapid start lamp sockets. Lamp
disconnect sockets may be required for use with certain
manufacturer's ballasts. This is in order to meet U.L. and
NEC regulations and maintains personal safety standards.
Lutron does not require lamp disconnect sockets with their
ballasts. Refer to the manufacturer's ballast label for this
information.
Lamps: Use only rapid start fluorescent lamps. Energy
Saver Lamps may NOT be used with this dimmer.
With
magnetic ballasts only, do not mix different wattage
lamps in the same circuit. NOTE: For proper dimming
performance lamps must be operated at full intensity for
100 hours prior to dimming.
Ballasts: Use ONLY dimming ballasts listed on chart in
step 2 of Pre-Installation.
With magnetic ballasts only, do
not mix 1 and 2 lamp ballasts in any one dimmer circuit. Do
not mix ballasts manufactured by more than one company.
Using single lamp ballasts will produce the most consistent
low end dimming level.
Multi-phased Applications (120/208-3 Phase): In multi-
phased applications use a separate neutral for each phase
containing a dimmer. Contact the
Lutron Technical
Assistance Hotline toll-free for Application Note #17,
"Common Neutral Interaction".
** Only NF-10 may be used with Lutron Ballasts. Total Amps are determined by
adding all ballast line currents as indicated on ballast label.
Lutron
Hi-lume
16 Amps
Eco-10
Electronic
Ballasts
NF-10**
Number of Side Sections Removed
None
One
Two
NF-10 NF-20 NF-30 NF-10 NF-20 NF-30 NF-10 NF-20
NF-30
Universal
550LTCP
†
12
24
36
9
22
34
6
19
31
502ATCP
†
*
12
24
36
9
20
32
4
18
28
Advance
DIM 140H
10
20
30
7
18
27
4
15
25
DIM 240H*
10
20
30
6
18
26
4
14
24
Valmont
8G5001W
12
24
36
9
22
34
6
19
31
8G5007W*
12
24
36
9
20
32
4
18
28
†
can be used with 30W lamps
* 2 lamp ballast
NF-10 controls when used with
Lutron electronic dimming
ballasts do not require derating
when side sections are removed.
Figure A: Derating Ballast Chart
120V Applications
277V Applications
Lutron
Hi-lume
8 Amps
Eco-10
** Only NF-10-277 may be used with Lutron Ballasts. Total Amps are determined by
adding all ballast line currents as indicated on ballast label.
Magnetic
Ballasts
Number of Side Sections Removed
None
One
Two
NF-10-277 NF-20-277 NF-10-277 NF-20-277 NF-10-277 NF-20-277
Magnetek
Universal
679LTCP
12
24
11
21
10
20
678LTCP
12
24
10
20
10
20
Controls
Ballasts
Controls
Ballasts
NF-10-277 controls when used
with Lutron electronic dimming
ballasts do not require derating
when side sections are removed.
Magnetic
Ballasts
Electronic
Ballasts
NF-10-277**
Units listed are maximum number of
LAMPS per control
Units listed are maximum number of
LAMPS per control
