c Tighten the screw to 7 in
‑
lb (0.79 N m) as shown in
.
Figure 151: Securing the Ground Wire
6 Connect the other end of the wire to a known reliable earth ground point at your site.
7 Connect the power supply to the source, following the instructions in
Connecting a 550 W DC Power Supply to the Source Voltage
Summit 550 W DC power supply units must connect to a –48V source.
The DC power connection at your facility must be made by a qualified electrician, following these
instructions.
Warning
Always make sure that the DC circuit is de-energized before connecting or disconnecting the
DC power cables on the DC power supply.
Caution
Provide proper connection and strain relief on the DC power cables in accordance with all
local and national electrical codes.
1 Verify that the DC circuit is de-energized.
2 Attach an ESD-preventive wrist strap to your bare wrist and connect the metal end to an
appropriate ground point on the rack.
3 Slide the cover off the terminal block.
Installing Your Extreme Networks Switch
ExtremeSwitching and Summit Switches: Hardware Installation Guide
199