Step

Details

Decide where you
want to put the light switches/dimmers. 
The
usual location is near entrances. 
Decide which lights will be on the same
circuit
and which switch will control that circuit. 
A circuit can be thought
of as the set of lights that are controlled by a given dimming
channel.
Bear in mind that
some
types of light (for example compact fluorescent) cannot be dimmed and
therefore cannot be on the same circuit as lights that are to be dimmed. You
will need to put these switchingonly lights on a separate circuit.

Calculate the
maximum total power for
each circuit. 
To do this,
add together the power rating of each of the bulbs in that circuit.
For example, if you have three 100W bulbs on one circuit, then
this circuit consumes: 3 x 100 Watts = 300 Watts.

Decide which Futronix dimmer has the required number of circuits without
exceeding its power requirements. 
Having decided
the power requirements of each circuit and the number of circuits you can
decide the Futronix product best suited to you. Use the following table:
Model 
Channels 
Max Load Per Circuit (Watts)

Maximum Dimmer
Load (Watts) 
Dimensions (in.)
Height, Width, Depth 
P100 
2 
300W 
600W 
2.6 x 2.6 x 1.88in. 
P400 
4 
300W 
1200W 
3.52 x 4.32 x 1.8in. 
P800 
8 
600W 
2000W 
3.8 x 6.08 x 1.8in. 

Double check that the dimmer is NOT overloaded. 
Although the
power requirements of each individual circuit are in the required range, make
sure you don't exceed the
maximum total power
rating of the dimmer.
For example the P800 has 8 circuits
each rated at 600 Watts each. But the maximum total power is only 2000 Watts
(which is less than 8 x 600 Watts). 