Rockwell Automation System Design for the Control of Electrical Noise - Manual (Page 109)

Publication GMC-RM001A-EN-P — July 2001
Noise Control Supplement A-7
Figure A.5
Wire segregation test results
Figure A.6
Wire segregation test panel
Conclusions
The following statements summarize the results of the testing.
• 150 mm (6 in.) is a reasonable minimum separation required even
for short runs.
• A well grounded steel dividing wall is as good or better than 200
mm (8 in.) of separation.
Very noisy or very sensitive wires are best placed close to the
backplate if possible (this is good EMC practice).
Wire Segregation Test
500 mm run, unsuppressed relay coil
0.01
0.1
1
10
100
0 25 50 100 200
Horizontal Separation mm
Victim Noise Vp
k
40 mm
3 mm