Additional US requirements
Type MC continuous corrugated aluminum armor cable with symmetrical grounds or
shielded power cable must be used for the motor cables if metallic conduit is not
used. For the North American market, 600 VAC cable is accepted for up to 500 VAC.
1000 VAC cable is required above 500 VAC (below 600 VAC). For drives rated over
100 amperes, the power cables must be rated for 75
Conduit
Where conduits must be coupled together, bridge the joint with a ground conductor
bonded to the conduit on each side of the joint. Bond the conduits also to the drive
enclosure. Use separate conduits for input power, motor, brake resistor, and control
wiring. When conduit is employed, type MC continuous corrugated aluminium armor
cable or shielded cable is not required. A dedicated ground cable is always required.
Note: Do not run motor wiring from more than one drive in the same conduit.
Armored cable / shielded power cable
Six conductor (3 phases and 3 ground) type MC continuous corrugated aluminum
armor cable with symmetrical grounds is available from the following suppliers (trade
names in parentheses):
• Anixter Wire & Cable (Philsheath)
• BICC General Corp (Philsheath)
• Rockbestos Co. (Gardex)
• Oaknite (CLX).
Shielded power cables are available from Belden, LAPPKABEL (ÖLFLEX) and
Pirelli.
Power factor compensation capacitors
Power factor compensation is not needed with AC drives. However, if a drive is to be
connected in a system with compensation capacitors installed, note the following
restrictions.
WARNING! Do not connect power factor compensation capacitors to the motor
cables (between the drive and the motor). They are not meant to be used with AC
drives and can cause permanent damage to the drive or themselves.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
°
°
C (167
F).
Planning the electrical installation
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