Rockwell Automation FlexPak 3000 DC Drive Version 4.3 - Manual (Page 83)

Compliance with European Union Electromagnetic Compatibility Standards B-11
Figure B.10 – Ground System and Conduit Screen Termination
The minimum cross-sectional area of a copper ground conductor shall be per
EN60204-1: Safety of Machinery - Electrical equipment of machines - Part 1: General
requirements, section 5.2, Table 1.
The ground conductor must be secured at both ends in a good connection. Poor
connection of a ground connection is the single biggest source of EMC problems. For
connections, use fittings intended for good, long-term connections to a grounded
surface, or continue the screen or conduit beyond the cabinet barrier to a ground
terminal or copper bar extension. Fittings should be rust-resistant. It is preferred to
terminate the screen or conductive conduit to a system ground copper bar internal on
the back panel and not rely on the conduit fitting to maintain the ground circuit.
Shielded cable should use a drain wire for the electrical bonding of the shield to the
ground system.
B.5 Wiring the Equipment
Wiring guidelines are provided here for wiring that is external and internal to the
electrical cabinet. Information specific to components is also provided.
B.5.1 External Wiring Guidelines
External control, signal, and power wiring must be in screened cable or rigid
continuous conductive conduit.
If the system includes a remote operator station that is connected to the FlexPak 3000
drive, the operator station wiring must be in rigid continuous conductive conduit.
Screen cable cannot be used for the operator station.
Important: Many flexible metal conduit products have not been designed for RF
containment and are not adequate to maintain compliance.
B.5.2 Internal Wiring Guidelines
All cables and wires must be run as closely to the panel as possible. AC, DC and
control wires should be stacked and run as shown in figure B.11.
Main Electrical
Cabinet
Electrical Components,
such as remote operator
stations and motor.
Screened Cable or Conductive Conduit
Terminate the screen to
ground at both ends
Terminate ground wire to
ground at both ends