Advertisement
Installing and Removing Power Components
Step 7
Insert the AC power cord and tighten the cable bushing lock nut.
Step 8
Remove the M6 nut from the ground connection (green cable conductor is typically ground), attach the ground cable
conductor, and tighten the nut (ground cable conductor has a closed-ring connector) to a torque value of 20 in.-lb (2.26
N-m).
Step 9
For AC Wye only, connect the neutral cable conductor to the terminal block by backing out the left-side terminal block
screw, inserting the cable conductor, and tightening the screw to a torque value of 9 in.-lbs (1.04 N-m). Do not loosen
the screw on the right side of the terminal block.
Be careful not to back the connection screws too far or they fall out.
Note
Step 10
For AC Delta and AC Wye, connect the three active cable conductors by backing out the left-side terminal block screw,
inserting the cable conductor, and tightening the screw to a torque value of 9 in.-lbs (1.04 N-m). Do not loosen the
screw on the right side of the terminal block.
What to do next
After performing this task, the AC rectifiers can be installed. For more information, see
Rectifier or DC
Removing Fixed Configuration AC Power Cords
This section describes how to remove the AC Wye and AC Delta power cords from the fixed configuration
power shelf.
Prerequisites
Before performing this task, power down and remove AC rectifiers and the alarm module in the shelf you
want to disconnect. Remove the upper grille form the rear (MSC) side of the chassis, if installed.
Note
Before removing AC power cord from the power shelf, make sure that the AC power cord is not plugged into
the facility power.
Required Tools and Equipment
• ESD-preventive wrist strap
• 3/8-in. ratchet wrench with 10-mm socket
• 1/4-in. x 6-in. long slotted screwdriver
AC Wye Power Shelf
The rear of the AC Wye power shelf with the rear cover removed is shown in
Shelf Rear, on page
20
section.
Note
When removing AC wiring from the fixed configuration power shelf, be sure to remove the ground cable
conductor last.
PEM.
20. For more information on AC Wye power shelf, see
Removing Fixed Configuration AC Power Cords
Figure 12: AC Wye Power
AC Wye Power Shelf, on page
Installing and Removing Power Components
Installing an AC
23
Advertisement
