Leprecon VX Series permanent rack User Manual
Page 6
4) Connecting Rack Power
a) Derating of 96 Channel Systems
Rack systems containing 96 circuits of 20 amp dimmers MUST be derated to a lower
total load capacity. The total allowed load for these systems is 218,880 watts. This is
95% of the theoretical capacity of 230,400 watts if the system were not derated.
b) Ampacity and Conductor sizing
This chart shows the proper conductor size to allow 20 amp Leprecon Dimming System
to be used to it’s full load capacity. Note that systems above 48 channels MUST be
wired with three phase service. Wire sizes are based on NEC 310. Further derating may
be necessary based on conditions and local codes.
Note: Conductors must be rated for 90 degrees Celsius.
For fully loaded 20 amp systems. Wire size based on 4 conductors in conduit.
# of
Channels
Single Phase
Current Rating
(A) per leg
Min Wire
Size
# of
conductors
per terminal
Three Phase
Current
Rating (A)
per leg
Min Wire
Size
phase and
neutral
# of
conductors
per terminal
12
120
1/0
1
80
3 awg
1
24
240
1/0
2
160
1/0
2
36
360
4/0
2
240
1/0
2
48
480
350 MCM
2
320
3/0
2
60
N/A
400
250 MCM
2
72
N/A
480
350 MCM
2
84
N/A
560
500 MCM
2
96
N/A
608*
500 MCM*
2
For fully loaded 10 amp systems. Wire size based on 4 conductors in conduit.
# of
Channels
Single Phase
Current Rating
(A) per leg
Min Wire
Size
# of
conductors
per terminal
Three Phase
Current
Rating (A)
per leg
Min Wire
Size
phase and
neutral
# of
conductors
per terminal
12
60
4 awg
1
40
6 awg
1
24
120
1/0
1
80
3 ga
1
36
180
1/0
2
120
1/0
1
48
240
1/0
2
160
3/0
1
60
300
3/0
2
200
1/0
2
72
360
4/0
2
240
1/0
2
84
420
300 MCM
2
280
2/0
2
96
480
400 MCM
2
320
3/0
2