Rockwell Automation System Design for the Control of Electrical Noise - Manual (Page 36)

Publication GMC-RM001A-EN-P — July 2001
3-4 Segregating Sources and Victims
Routing Wires and Cables
Within a Panel The following figures provide examples of how to route clean, dirty,
and very-dirty wireways or cable trays within a panel.
Figure 3.2
Routing clean and dirty cables
Observe the following guidelines when planning your panel layout
for clean and dirty cables:
• The plated steel barrier between clean and dirty wireways allow
them to run close together.
• If dirty power is required at A, then run it via wireway B using
shielded cable. Refer to the chapter Shielding Wires, Cables, and
Components for more information.
• The vertical wireway at C is not good practice as it encourages the
creation of loops. Refer to the section Minimizing Loops later in
this chapter.
• The use of different colored wireways (e.g., grey for clean and
black for dirty) encourages good segregation.
C
B
C
A
Relays
Clean Zone
(grey wireway)
Sensitive
equipment
Barrier
Power
distribution
PWM
Drive
PWM
Drive
PLC
PSU
Dirty Clean
Main Panel
(front view)
Dirty Zone
(black wireway)