Juniper QFX10016, Hardware Manual

Page: 299 / 439

5. Remove the plastic cable cover from the DC power input terminals by using the
Phillips (+) screwdriver, number 2, to loosen the screws (see
Figure 139 on page 288 ).
Figure 139: Removing the Plastic Cable Cover on a QFX10000-PWR-DC Power Supply
6. Remove the nuts from each DC power input terminal, using the 13/32 in. (10 mm) nut driver or
socket wrench to loosen the nuts.
7. Ensure that the power source circuit breaker is open so that the voltage across the DC power
source cable leads is 0 V and that the cable leads do not become active while you are connecting
DC power.
8. Install a power lug on each DC power cable. Ensure the lug meets the double hole standard lug
terminal for 4 AWG wire. The lugs should be dual, 1/4 in. spaced 5/8 in. apart. The terminal must
accommodate double hole standard lug terminal for 4 AWG or larger wire.
9. Verify that the DC power cables are correctly labeled before making connections to the power
supply. In a typical power distribution scheme where the return is connected to chassis ground at
288