Cabling the Switch
Important: Apply ground connection to the switch first during installation and remove last when
removing power.
Appliquer connexion à la terre à l'interrupteur premier lors de l'installation et de supprimer la
dernière alimentation lors du débranchement.
4.2.2.1
Wire and Lug Preparation
Before performing any installation actions, ensure power is removed from DC circuits by turning off the
power line servicing the circuits. Prepare the stranded wiring before you begin a DC power installation.
Note: Stranded copper wiring is required and should meet local and national installation
requirements. Wires and grounding lugs are not supplied.
1. Attach an ESD grounding strap.
2. Prepare the stranded copper wiring for the power supply to be used.
Tightening Torques for DC PSUs
provides wiring, lug, and tightening torque information for the
power supplies covered in this guide.
Table 5: Wiring, Lug, and Tightening Torques for DC PSUs
Wire Size
(1)
Tightening Torque
PSU
(AWG)
(mm
2
)
Lug Type
(2)
N • m
in. • lbs.
PWR-500-DC
14 or
larger
2.0 or
larger
ring or spade/fork
1.0
9
PWR-1900-DC
4 - 6
21.2 -
13.3
2.7
24
PWR-1011-DC
6 - 8
16.0 -
10.0
2.7
24
PWR-2411-DC
2 - 4
35.0 -
25.0
2.7
24
1. Unless otherwise noted, wire size applies to -48V, Battery return, and Protective earth wires.
2. Unless otherwise noted, twin #10 studs spaced for dual-hole lug with 5/8" hole spacing.
3. Strip the wires to the appropriate length for the lugs to be used.
4. Use agency-approved compression (pressure) lugs for wiring terminations.
5. Slip on heat-shrink tubing on the wire ends before assembling the lugs on to the wire.
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