Installing, Wiring, and Connecting a –48 VDC PSU
102 7750 SR-a4 and SR-a8 Installation Guide
• three lengths of #8 AWG wire, insulated and color-coded according to local safety
code, or #8 AWG jacketed three-conductor cord:
→ one ground wire, measured to extend from the PSU to the building ground point
or equipment bus ground point
→ one positive battery cable, measured to extend from the PSU to the positive
battery terminal
→ one negative battery cable, measured to extend from the PSU to the negative
battery terminal or disconnect device, if used
• three single-hole terminal lugs for the three lengths of #8 AWG wire for connection
to the PSU
• wire stripping tool
• wire crimper
• Phillips torque screwdriver
To prepare the PSU end of the ground cable:
Step 1. Using a wire-stripping tool, strip the wire insulation to the length according to the
recommendation of the terminal manufacturer or local safety code (Keys 1and 2 in
Figure 32).
Step 2. Attach the wire to the terminal ring and crimp the ring lug according to the
instructions of the terminal ring manufacturer (Key 3 in Figure 32).
Figure 32: Attaching the Ring Lug to a Ground Cable
Table 44: Ring Lug to Ground Cable Descriptions
Key Description
1 #8 AWG copper wire (see Required tools and hardware)
2 Insulation stripped according to the recommendation of the manufacturer or local
safety code
3 Ring lug (see Required tools and hardware)
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