Dell Force10 C300 Quick Start Guide - Page 10

Attach a Ground Cable to the C150/300 DC Chassis WARNING: You must complete the ground connection before proceeding with any DC PEM connection. The AC power cord is the primary ground connection for C-Series AC chassis. This procedure applies to the DC powered chassis only. You must provide your own cables to connect to a remote power source (a circuit breaker panel, for example) in your equipment rack or facility. Cables must be sized to meet the following criteria: • Rated for 60A service to allow for a fully loaded C150 system per NEC in the United States or internationally, per local safety codes. • Limit voltage drop across the cable length to 0.5V or less. NOTE: Apply a coat of anti-oxidant paste to unplated metal contact surfaces before you make the cable connections. File unplated connectors, braided straps, and bus bars to a shiny finish. It is not necessary to file and coat tinned, solder plated, or silver-plated connectors or other plated connection surfaces, such as those on the PEM studs. Step Task 1 Locate the chassis ground connector stud on the PEM front panel. It is the single stud below the safety cover. 2 Remove the nut and washer from the ground stud. 3 Apply a coat of anti-oxidant paste to the connector stud, if required. 4 Install the grounding cable. This cable is typically green or green and yellow. NOTE: Termination points require UL-listed 1-hole lug with a 1/4-inch hole. 5 Replace the washer and nut on the stud. 6 Secure the nut with a nut driver or torque wrench (not to exceed 4 ft/lbs). 7 Connect the opposite end of the grounding cable to the appropriate nearest grounding. 8 Installing the Hardware