Rockwell Automation Liqui-Flo DBT Reach Drive - Manual (Page 11)

Installation/Wiring 2-5
2.2.3 RFI Filter Grounding
Using an optional RFI filter may result in relatively high ground leakage currents.
Therefore, the filter must only be used in installations with grounded AC supply
systems and be permanently installed and solidly grounded (bonded) to the
building power distribution ground. Ensure that the incoming supply neutral is solidly
connected (bonded) to the same building power distribution ground. Grounding must
not rely on flexible cables and should not include any form of plug or socket that would
permit inadvertent disconnection. Some local codes may require redundant ground
connections. The integrity of all connections should be periodically checked. Refer to
the instructions supplied with the filter.
2.3 Fuses and Circuit Breakers
The Reach Drive includes input fuses. National and local industrial safety regulations
and/or electrical codes may determine additional requirements for these installations.
Refer to Appendix A for recommended fuses/circuit breakers.
2.4 Power Wiring
2.4.1 Cable Types Acceptable for 200-600 Volt Installations
A variety of cable types are acceptable for drive installations. For many installations,
unshielded cable is adequate, provided it can be separated from sensitive circuits. As
an approximate guide, allow a spacing of 0.3 meters (1 foot) for every 10 meters (32.8
feet) of length. In all cases, long parallel runs must be avoided. Do not use cable with
an insulation thickness less than or equal to 15 mils (0.4mm/0.015 in.). Use Copper
wire only. Wire gauge requirements and recommendations are based on 75 degrees
C. Do not reduce wire gauge when using higher temperature wire.
Unshielded
THHN, THWN or similar wire is acceptable for drive installation in dry environments
provided adequate free air space and/or conduit fill rates limits are provided. Do not
use THHN or similarly coated wire in wet areas. Any wire chosen must have a
minimum insulation thickness of 15 Mils and should not have large variations in
insulation concentricity.
2.4.2 Motor Cable Lengths
Typically, motor lead lengths less than 91 meters (300 feet) are acceptable.
!
ATTENTION: The Reach Drive does not provide branch short circuit
protection. Specifications for the recommended fuse or circuit breaker to
provide protection against short circuits are provided in Appendix A.
!
ATTENTION: National Codes and standards (NEC, VDE, BSI etc.) and
local codes outline provisions for safely installing electrical equipment.
Installation must comply with specifications regarding wire types,
conductor sizes, branch circuit protection and disconnect devices. Failure
to do so may result in personal injury and/or equipment damage.