Connecting Power Cables - Sun Microsystems Fire 15K Hardware Installation Manual

2.5

Connecting Power Cables

Caution – Do not make mechanical or electrical modifications to the processor or
I/O cabinets. Sun Microsystems is not responsible for the regulatory compliance if
the cabinets are modified.
The system requires an electrical circuit that is grounded to earth. The American
standards group, Underwriters Laboratories, Inc., specifies:
The attachment-plug receptacles in the vicinity of the unit or system are all to be of
an earthing type, and the earthing conductors serving these receptacles are to be
connected to earth at the service equipment.
Caution – The AC power connections provide a ground path that will protect the
components (boards and drives) in the cabinet from static electricity damage.
Complete the following connections with the provided cables:
1. Verify ALL of the power supply breakers (AC0, AC1) are in the off position prior
to connecting any power cords.
2. Verify with a digital voltmeter (DVM) that the incoming AC voltage is correct for
the customer site.
Refer to the Sun Fire 15K/12K Systems Site Planning Guide for further information.
3. Connect the AC power cords into their appropriate AC connectors on the front
panel of the power supply.
See
FIGURE 2-4
The strain relief for the AC0 power cable housing is positioned downward when
connected. The strain relief for the AC1 power cable housings is positioned upward
when connected. Power source A cord will normally connect into AC0. Power
source B cord will normally connect into AC1.
4. Secure all of the cables to improve overall appearance and prevent damage.
An insulated earth-ground conductor that is identical in size, insulation
material, and thickness to the earthed and unearthed branch-circuit
supply conductors, except that it is green with or without one or more
yellow stripes, is to be installed as part of the branch circuit that supplies
the unit or system. The earthing conductor described is to be connected
to earth at the service equipment or, if supplied by a separately derived
system, at the supply transformer or motor-generator set.
to determine the proper part number and orientation for connection.
Chapter 2 Installing the Sun Fire 15K/12K Systems Hardware 2-7