Return to TOC Curtis 1239E-1269E Manual, os 37.0 RevA – May 2021
2 — INSTALLATION AND WIRING
pg. 7
• If two lugs are used on the same terminal, stack them so the lug carrying the least current is
on top.
• Tighten the assembly to 9.6 ± 0.9 N·m (85 ± 8 in-lbs).
High Power Wiring Guidelines
Battery Cables (B+, B–)
ese two cables should be run close to each other between the controller and the battery. Use high
quality copper lugs and observe the recommended torque ratings. For best noise immunity the cables
should not run across the center section of the controller. With multiple high current controllers,
use a star ground from the battery B– terminal.
Motor Wiring (U, V, W)
e three phase wires should be close to the same length and bundled together as they run between
the controller and the motor. e cable lengths should be kept as short as possible. Use high quality
copper lugs and observe the recommended torque ratings.
For optimum noise immunity, the motor cables should not run across the center section of the
controller. In applications that seek the lowest possible emissions, a shield can be placed around
the bundled motor cables and connected to the B– terminal at the controller. Typical installations
will readily pass the emissions standards without a shield. Low current signal wires should not be
run parallel to the motor cables. When necessary they should cross the motor cables at a right angle
to minimize noise coupling. Refer to Appendix A for further information about Electromagnetic
Compatibility (EMC).
M8 BOLT
SAFETY WASHER
LUG
M8 TERMINAL
SECTION VIEW EXPLODED VIEW
7.5 mm MIN DEPTH
13.75 mm
MAX DEPTH
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