Lutron Derating Charts
About Ganging
Ganging is the mounting of two or more controls side-by-side in a series of connected wallboxes. Scored break-off fins along each side of the control’s mounting plate are designed to be removed to facilitate ganging in a single existing wallbox. Removal of the fins decreases the control’s ability to dissipate heat and thus reduces the current carrying capacity of the control.
If you are uncertain of your ability to correctly select or install Lutron or any other electrical products, you should consult with a qualified electrical contractor or technician before ordering or installing.
Ganging and Derating for Lutron Wallbox Dimmers
Derating is the reduction of the maximum capacity (load) a dimmer can reliably handle when the side sections (fins) are removed.
Vareo, Nova T*, Nova and Centurion dimmers may be ganged without removing the side sections - no derating required. Side sections can be removed to save space or have ganged units fit into existing wallboxes - derating required (side sections must be removed if using VWP Vareo wallplates for Vareo wallplates for Vareo dimmers or tap switches).
Lumea2, Maestro, Diva, Skylark, Ariadni, Faedra, Glyder and Rotary dimmers must remove side sections to gang - derating required.
Athena dimmers have no removable side sections and derating is not required.
Click To Jump To The De-Rating Charts
Planning a Multigang Installation
STEP 1
Determine if the side sections are to be removed or to remain intact (applicable to Vareo, NovaT*, Nova, Centurion).
Consider: width of application, load, number of wallboxes required, product type and side section breakoff options.
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Control Widths (for determining width of a ganged installation) |
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Control Size |
Width |
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Side Sections |
One Side |
Two Sides Removed |
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Small |
2 3/4" |
2 1/4" |
1 3/4" |
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Large |
4 1/2" |
4 1/8" |
3 5/8" |
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Note:
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STEP 2
Use the capacity derating charts to determine maximum permissible loads for each control in the installation if side sections will be removed.
STEP 3
Determine number of wallboxes required and plan control placements in gang (see charts below):
Wallboxes Required - ALL SIDE SECTIONS INTACT |
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. |
Number of Small Controls |
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Number of Large Controls |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
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0 |
0 |
1 |
1+1* |
4 |
4+1* |
7 |
7+1* |
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1 |
1 |
3 |
5 |
6 |
8 |
9 |
11 |
|
2 |
4 |
6 |
7 |
9 |
10 |
12 |
13 |
|
3 |
6 |
8 |
10 |
11 |
13 |
14 |
16 |
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4 |
9 |
11 |
12 |
14 |
15 |
17 |
18 |
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Note: When ganging an even number of small controls with no side sections removed, use wallboxes with tapped ears as shown below. Do not use plastic rings or gangbox covers. Space an additional wallbox 3/4" apart from the other wallbox(es). A 3/4" chase nipple is recommended as a spacer between the wallboxes. Example: Wallbox arrangement required for gang of 4 small controls, side sections intact:
Assembling The Controls: When ganging any combination of small and large controls, place a small control on one extreme end of the gang, and a large control at the other end of the gang. Use center and offset mounting holes as necessary. |
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Wallboxes Required - ALL INSIDE SECTIONS REMOVED |
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. |
Number of Small Controls |
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Number of Large Controls |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
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0 |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
|
1 |
1 |
3 |
4 |
5 |
6 |
7 |
8 |
|
2 |
3 |
5 |
6 |
7 |
8 |
9 |
10 |
|
3 |
5 |
7 |
8 |
9 |
10 |
11 |
12 |
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4 |
7 |
9 |
10 |
11 |
12 |
13 |
14 |
Removing Inner Side Sections
When removing side sections, remove only inner side sections. Do not remove side sections on outer ends of the gang.
Assembling the Controls
When ganging any combination of small and large controls, place a small control on one extreme end of the gang and a large control at the other end of the gang. Use center and offset mounting holes as necessary.
STEP 4
Determine your multigang wallplate requirements
CAPACITY DERATING CHARTS
Vareo1,2 and Nova T*1,2 Products |
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. |
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CONTROL TYPE |
No side sections removed (full capacity) |
One side section removed |
Middle unit has two side sections removed |
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DIMMERS |
MAXIMUM CAPACITY |
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Incandescent |
600W |
500W |
300W |
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1000W |
900W |
700W |
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1500W |
1250W |
1000W |
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1950W 5 |
-- |
-- |
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MagneticLow Voltage |
600VA |
500VA |
300VA |
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(450W) |
(400W) |
(250W) |
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1000VA |
900VA |
700VA |
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(800W) |
(750W) |
(500W) |
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1500VA |
1250VA |
1000VA |
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(1200W) |
(1000W) |
(800W) |
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Electronic Low Voltage |
300W |
300W |
250W |
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600W |
500W |
400W |
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Fluorescent |
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Hi-Lume/ Eco-10 (ECO Series) |
. |
. |
. |
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Vareo |
20 Ballasts/ 8 A |
20 Ballasts / 6A |
20 Ballasts / 4.5A |
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Nova T* |
6A |
No derating required |
No derating required |
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8A |
No derating required |
No derating required |
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16A |
No derating required |
No derating required |
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Eco-10 (TVE Series) 0-10 VDC |
60 ballasts / 16A |
No derating required |
No derating required |
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Tu-Wire 3 |
5A |
4A |
3.3A |
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Fan Speed Controls |
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Quiet Controls4 |
1.5A |
1.5A |
1.5A |
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FullyVariable Controls |
6A |
4.2A |
2.5A |
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12A |
10A |
8.3A |
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Electronic Tapswitches6 |
1000W/VA |
800W/VA |
650W/VA |
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Footnotes: 1 Controls must have side sections removed to gang if using "VWP Series" wallplates
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Nova and Centurion Products |
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. |
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CONTROL TYPE |
No side sections removed (full capacity) |
One side section removed |
Middle unit has two side sections removed |
|
DIMMERS |
MAXIMUM CAPACITY |
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Incandescent |
600W |
600W |
500W |
|
. |
1000W |
900W |
700W |
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. |
1500W |
1250W |
1000W |
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. |
2000W |
1800W |
1500W |
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Magnetic Low Voltage |
600VA |
600VA |
500VA |
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. |
(450W) |
(450W) |
(400W) |
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. |
1000VA |
900VA |
700VA |
|
. |
(800W) |
(750W) |
(500W) |
|
. |
1500VA |
1250VA |
1000VA |
|
. |
(1200W) |
(1000W) |
(800W) |
|
. |
2000VA |
1800VA |
1500VA |
|
. |
(1600W) |
(1500W) |
(1200W) |
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Electronic Low Voltage |
450W |
400W |
350W |
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Fluorescent |
Nova controls may be used with either Lutron Hi-lume electronic dimming ballasts or magnetic dimming ballasts. Controls used with electronic dimming ballasts do not require derating. |
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FAN-SPEED CONTROLS |
. |
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Fully Variable Controls |
6A |
5.5A |
5A |
|
. |
12A |
11A |
10A |
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Ariadni, Diva, Diva Satin Colors, Faedra1, Glyder, Luméa2, Maestro1, RadioRA, Rotary, Spacer1, and Spacer System1 |
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. |
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CONTROL TYPE |
No side sections removed (full capacity) |
One side section removed |
Middle unit has two side sections removed |
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DIMMERS |
MAXIMUM CAPACITY |
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Incandescent2 |
600W |
500W |
400W |
|
1000W |
800W |
650W |
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Dual Slide Dimmers |
300W/300W |
250W/250W |
200W/200W |
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MagneticLow Voltage2 |
600VA |
500VA |
400VA |
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(450W) |
(375W) |
(300W) |
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|
1000VA |
800VA |
650VA |
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|
(800W) |
(650W) |
(500W) |
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Electronic Low Voltage |
300W |
250W |
200W |
|
600W |
500W |
400W |
|
|
Fluorescent |
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Hi-Lume/ Eco-10 (ECO and TVE Series) |
20 Ballasts / 6 A |
No derating required |
No derating required |
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8A |
No derating required |
No derating required |
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Tu-Wire |
5A |
4A |
3.3A |
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FAN SPEED CONTROLS |
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Quiet Controls4 |
1.5A |
No derating required |
No derating required |
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FullyVariable Controls5 |
5A |
4A |
3A |
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10A |
cannot gang |
cannot gang |
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FAN/LIGHT CONTROLS |
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Quiet Controls4 |
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Skylark |
1.5A/360W |
No derating required |
No derating required |
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Skylark |
1.5A/300W |
No derating required |
No derating required |
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Lumea2 |
1.5A/600W |
No derating required |
No derating required |
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Fully Variable5 |
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Skylark |
5A/360W |
4A/360W |
3A/360W |
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Skylark |
2.5A/300W |
2.1A/250W |
1.7A/200W |
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Electronic Switches |
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RadioRA |
8A |
6.5A |
5A |
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Spacer System |
6A |
5A |
3.5A |
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Footnotes: 1 Accessory dimmers/accessory switches for Spacer System, Spacer, RadioRA, Faedra, and Maestro Smart Remotes do not require derating. |
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If you are uncertain of your ability to correctly select or install Lutron or any other electrical products, you should consult with a qualified electrical contractor or technician before ordering or installing.
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