Rockwell Automation DC3RD Digital Regenerative DC Drive User Guide 1/4 - 2 HP, 115/230 VAC - Manual (Page 17)

Shielding guidelines
9 Installation
As a general rule, Reliance Electric recommends shielding
of all conductors if:
• wire lengths exceed 4 inches and power and logic leads
must be bundled together*; or
• radiated and/or conducted noise must be minimized due
to concerns about immunity or general compliance (CE,
FCC, etc.)
* Reliance Electric considers this an unfavorable condition and does
not recommend bundling power and logic leads for any length.
ATTENTION: If it is not practical to shield power
conductors, Reliance Electric recommends shielding all
logic-level leads. If shielding is not practical, use
twisted-pair control wiring to minimize induced noise.
ATTENTION: Under no circumstances should power
and logic leads be bundled together. Induced voltage
can cause unpredictable behavior any electronic device,
including motor controls.
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