Installation/Wiring
1-7
PowerFlex 700S Phase II AC Drive User Manual -
Publication 20D-UM006G-EN-P – July 2008
Power 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° C. Do not
reduce wire gauge when using higher temperature wire.
Table 1.A Recommended Cable Design
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.
!
ATTENTION: National Codes and standards (NEC, 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.
Type
Max. Wire Size Where Used
Rating/Type
Description
Type 1
2 AWG
Standard Installations
100 HP or less
600V, 90
o
C (194
o
F)
XHHW2/RHW-2
Four tinned copper conductors with XLPE insulation
Type 2
2 AWG
Standard Installations
100 HP or less with
Brake Conductors
600V, 90
o
C (194
o
F)
RHH/RHW-2
Four tinned copper conductors with XLPE insulation plus
one (1) shielded pair of brake conductors.
Type 3
500 MCM AWG Standard Installations
150 HP or more
Tray rated 600V, 90
o
C (194
o
F)
RHH/RHW-2
Three tinned copper conductors with XLPE insulation
and (3) bare copper grounds and PVC jacket.
Type 4
500 MCM AWG Water, Caustic Chemical,
Crush Resistance
Tray rated 600V, 90
o
C (194
o
F)
RHH/RHW-2
Three bare copper conductors with XLPE insulation and
three copper grounds on #10 AWG and smaller.
Acceptable in Class I & II, Division I & II locations.
Type 5
500 MCM AWG 690V Applications
Tray rated 2000V, 90
o
C (194
o
F)
Three tinned copper conductors with XLPE insulation. (3)
bare copper grounds and PVC jacket.
Note: If terminator network or output filter is used,
connector insulation must be XLPE, not PVC.
