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Incoming Power Requirements
A remote fused AC line disconnects or circuit breaker installed ahead of the control is required
by the NEC (National Electrical Code). The control is designed to accept single-phase AC line
voltage.
Grounding
The control must be connected to earth ground either via mounting screws provided by an
enclosure or chassis-installed screw or by using the Earth Ground lug provided on the drive
heatsink, for safety of operating personnel. The ground wire should be of the same gauge as
the AC Input wires and must be connected to the panel or enclosure frame for personal safety.
Wiring Guidelines for Focus DC Drives
Check drive nameplate data for conformance with AC power source and motor
AC
Input
DC Output Shunt Field
HP Fusing Max
Wire Armature
Armature Wire Field Field Wire
Volts Amps AWG Volts Amps AWG Volts Amps AWG
¼ -1
½-2
15
Amp
250Vac
120
240
14
14
#14 90
180
10
10
#14 100
200
1
1
#14
Notes:
All wiring based on 75°C copper wire, types FEPW, RH, RHW, THHW,
THW, THWN, XHHW, USE, ZW
Wire gauge size based on 30°C maximum ambient and no more than
three conductors in a raceway or cable and 1.25 service factor.
Please refer to National Electric Code Table 310-16 for additional
information.
Wiring must also meet any Local Codes.
Do not place knife switches, polarity reversing switches, reversing contacts in
the armature or field circuits.
During normal operation, keep all covers in place and cabinet doors shut.
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