Rockwell Automation MD65 User Manual Version 2.0 - Manual (Page 32)

5-8 MD65 AC Drive User Manual
Note: For carrier frequencies above 4 kHz, see figure 9.10.
5.6 Motor Cable Types Acceptable for
200-600 Volt Installations
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 15 mils
(0.4 mm/0.015 in).
• UL installations in 50°C ambient must use 600 V, 75°C or 90°C
wire.
• For UL installations in 40°C ambient, 600 V, 75°C or 90°C wire is
recommended.
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 mil 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.
2 Fuse ratings are the recommended values for use with each drive rating.
Recommended fuse type: UL Class J, CC, T or Type BS88; 600 V (550 V)
or equivalent.
3 Circuit breaker ratings are the recommended values for use with each
drive rating.