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
9.0
PWR-511-DC
10 - 12
6.0 - 4.0
ring
1.0
9.0
PWR-1011-DC
6 - 8
16.0 - 10.0
2.7
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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.
4. Strip the wires to the appropriate length for the lugs to be used.
5. Use agency-approved compression (pressure) lugs for wiring terminations.
6. Slip on heat-shrink tubing on the wire ends before assembling the lugs on to the wire.
7. Crimp the lugs with the proper tool, and ensure that the tubing extends over the barrel of the lugs
and the insulation on the wires.
8. Shrink the tubing with a heat gun.
4.3.3.2
Connecting a DC Power Supply to Power Source
To connect a DC power supply to power source:
Important: Ensure power is removed from DC circuits before performing any installation
actions. Locate circuit breakers or fuses on DC power lines servicing the circuits. Turn off the
power line circuits or remove the fuses.
Assurez-vous de pouvoir retirer des circuits en courant continu avant d’effectuer toute action
d’installation.Localiser les disjoncteurs ou fusibles sur les lignes électriques DC entretien des
circuits. Mettez hors tension le circuit ligne ou retirer les fusibles.
Important: Wire size must comply with local and national requirements and electrical codes.
Use only copper wire.
Calibre doit respecter les exigences locales et nationales et les codes de l’électricité. Utiliser
seulement du fil de cuivre.
Important: Apply the ground connection first during installation and remove last when
removing power.
Appliquer le motif connexion tout d’abord pendant l’installation et supprimer dernière lors du
retrait de puissance.
1. Prepare the stranded wiring (
).
2. Attach the appropriate lugs to the source DC wires.
3. Connect the DC-input wires to the appropriate terminals using the specified torque (
) in the following order.
Note: Remove terminal covers as needed.
a. Ground wire to the Protective Earth (PE) terminal.
b. Negative source DC cable to the negative (- / -48V) terminal.
c. Positive (+) source DC cable to the positive (+ / Rtn) terminal.
4. Replace the terminal covers as required.
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