Dell EMC PowerEdge R730xd Owner's Manual page 148

Figure 83. Removing the safety ground wire
1. #6-32 nut
3. grounding post
Assembling the DC input power wires
Prerequisites
For equipment using –(48–60) V DC power supply units (PSUs), a qualified electrician must perform all connections
NOTE:
to DC power and to safety grounds. Do not attempt connecting to DC power or installing grounds yourself. All electrical
wiring must comply with applicable local or national codes and practices. Damage due to servicing that is not authorized by
Dell is not covered by your warranty. Read and follow all safety instructions that came with the product.
Steps
1. Strip the insulation from the ends of the DC power wires, exposing approximately 13 mm (0.5 inch) of copper wire.
Reversing polarity when connecting DC power wires can permanently damage the power supply or the system.
NOTE:
2. Insert the copper ends into the mating connectors and tighten the captive screws at the top of the mating connector by
using a Phillips #2 screwdriver.
To protect the power supply from electrostatic discharge, the captive screws must be covered with the rubber
NOTE:
cap before inserting the mating connector into the power supply.
3. Rotate the rubber cap clockwise to fix it over the captive screws.
4. Insert the mating connector into the PSU.
148 Installing and removing system components
2. spring washer
4. safety ground wire