Extreme Networks ExtremeSwitching X440-G2 Series Hardware Installation Manual page 292

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 Verify that the ground wire is attached to the power supply.
See Connecting the Ground Wire to a 550 W DC Power Supply
4 Connect the DC power input cables as follows:
a On each terminal, loosen the screw enough to allow the spade terminal to slide underneath the
captive square washer (see
b Slide the spade terminal of the negative wire (–48 V) under the captive square washer on the
negative terminal (labeled –).
ExtremeSwitching and Summit Switches: Hardware Installation Guide
Figure 232 on page 293).
Replacing DC Power Supplies
on page 289.
292