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Wiring Recommendations
Since most start-up difficulties are the result of incorrect wiring, take every
precaution to assure the wiring is correct. Read and understand all items in
this section before beginning installation.
ATTENTION: The following information is merely a guide for
!
proper installation. The Allen-Bradley Company cannot assume
responsibility for the compliance or the noncompliance to any
code, national, local or otherwise for the proper installation of this
drive or associated equipment. A hazard of personal injury and/or
equipment damage exists if codes are ignored during installation.
Power Cable Types Acceptable for 200-600 Volt Installations
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.
General
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.). See
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.
Shielded/Armored Cable
Shielded cable contains all of the general benefits of multi-conductor cable
with the added benefit of a copper braided shield that can contain much of
the noise generated by a typical AC Drive. Strong consideration for shielded
cable should be given in installations with sensitive equipment such as
weigh scales, capacitive proximity switches and other devices that may be
affected by electrical noise in the distribution system. Applications with
large numbers of drives in a similar location, imposed EMC regulations or a
high degree of communications/networking are also good candidates for
shielded cable.
PowerFlex® 700S Drive
Table C on page
12.
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