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To guard against coupling noise from one conductor to another, the following
general guidelines when routing wires and cables (both inside and outside of an
enclosure) apply.
Category
Routing Guidelines
1
These conductors can be routed in the same cable tray or raceway with machine power conductors of
up to 600V AC.
2
If it must cross power cabling, cross at right angles.
• Route at least 1.5 m/5 ft. from high-voltage enclosures or sources of RF/microwave radiation.
• If the conductor is in a metal wireway or conduit, each segment of that wireway or conduit must be
bonded to each adjacent segment so that it has electrical continuity along its entire length. Also,
the wireway or conduit must be bonded to the enclosure at the entry point.
• Properly shield where applicable and route in a raceway separate from category 1 conductors.
• If in a continuous metallic wireway or conduit, route at least 0.08 m/3 in. from category 1
conductors of less than 20 A; 0.3 m/1 ft. from AC power lines of 20 A or more, but only up to 100
kVA; 0.6 m/2 ft. from AC power lines of greater than 100 kVA.
• If not in a continuous metallic wireway or conduit, route at least 0.15 m/6 in. from category 1
conductors of less than 20 A; 0.3 m/1 ft. from AC power lines of 20 A or more, but only up to 100
kVA; 0.6 m/2 ft. from AC power lines of greater than 100 kVA.
3
Where possible, route conductors external to all raceways in the enclosure or in a raceway separate
from any category 1 conductors with the same spacing as listed for category 2 conductors.
Use the spacing that is given in these general guidelines with the following
exceptions:
• Where connection points (for conductors of different categories) on a
device are closer together than the specified spacing
• Application-specific configuration for which the spacing is described in
a publication for that specific application
These guidelines are for noise immunity only. Follow all local codes for safety
requirements.
Given the Dynamix 1444 series system component top and bottom I/O access,
we recommend that you use cable ducts to organize and provide separation of
I/O wiring.
If there is high-voltage relay contact wiring (120/250V AC) and/or high
current load, assign top or bottom relay contacts. Or, use Expansion bus
extension cables to position applicable relay modules in a more suitable
location within the overall system.
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Install the Dynamix 1444 Series Monitoring System
Chapter 2
29
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