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Architectural Specification Lighting Controls
C
17
For answers to technical questions, call Leviton’s Techline at 1-800-824-3005
GANGING AND DERATING LIGHTING CONTROLS
Commercial Grade Lighting Controls
Maximum Load Per Dimmer for Multi-Ganging
All Strap-Mounted Dimmers
Ganging and Derating Box-Mounted Lighting Controls
Ganging is an installation practice where two or more lighting controls
are mounted side-by-side using the required number of connected
wallboxes. Ganging may require the removal of part of the fins on
Architectural Dimmers or part of the mounting strap on strap-mounted
devices. In Architectural Dimmers, the metallic fins help dissipate heat
from within the device. Strap mounted dimmers use the mounting
strap for the same purpose. Therefore, removing a portion of the fins or
strap for ganging purposes will require derating the dimmers to prevent
them from overheating.
Ganging and Derating Leviton Lighting Controls
When ganging Mural, True Touch, TouchPoint, ToggleTouch and
IllumaTech controls, the side sections of the mounting strap must be
removed. Use pliers to carefully bend side sections back and forth
until they break off. The side sections of the strap dissipate heat, so
removing them requires derating the dimmer’s capacity. See Chart 1.
Note that Leviton SureSlide and Trimatron lighting controls can be
ganged without removing any sections of their mounting straps.
However, SureSlide and Trimatron controls must also be derated when
they’re ganged.
Ganging
Switch boxes required
for ganging Leviton
architectural controls
when no fins are removed:
Ganging and Leviton Renoir
®
and Van Gogh
®
Architectural Lighting Controls
When fins are broken off on wide and narrow controls for ganging purposes, the number of switch boxes required can be quickly determined by
referring to the two charts below.
Switch boxes required
for ganging Leviton
architectural controls
when all inside fins
are removed:
*Narrow controls must have fins broken off to be ganged.
Number of Narrow Controls
0 0123456
0 0123456
1 1345678
2 35678910
3 5 7 8 9 10 11 12
4 7 9 10 11 12 13 14
5 9 111213141516
6 11 13 14 15 16 17 18
Number of Wide Controls
Number of Narrow Controls*
0 01234
0 •••••
1 13578
2 467911
3 7 9 10 11 13
4 9 11121416
Number of Wide Controls
Chart 1
Dimmer Single 2-Gang More Than
Rating 2-Gang
500W 500W 400W 300W
600W 600W 500W 400W
1000W 1000W 800W 700W
400VA 400VA 350VA 250VA
600VA* 600VA 500VA 400VA
1000VA 1000VA 800VA 700VA
*Except IPX06-7, which requires no derating
Maximum Bulb Wattage for Magnetic Low-Voltage Lighting
The capacity of a magnetic low-voltage dimmer is its VA rating. If a
wattage rating is also listed (as in this book), it is merely an estimate of
the lamp wattage that can be placed on a UL-approved magnetic low-
voltage transformer without exceeding the dimmer's VA rating. (This
is, in turn, based on an estimate of transformer efficiency.)
Chart 2
Power To Transformer Lamp Load
Transformer Efficiency
1000VA X 80% = 800W
600VA X 75% = 450W
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com