System Safety; Electrical Safety Precautions - Silicon Graphics NAS MIS Setup Manual

4.

Electrical Safety Precautions

007-5921-001
Chapter 4

System Safety

This chapter describes basic safety precautions for working with the SGI Modular InfiniteStorage
NAS systems.
Basic electrical safety precautions should be followed to protect yourself from harm and the
Modular InfiniteStorage system from damage, as follows:
• Be aware of the locations of the power on/off buttons on the chassis as well as the room's
emergency power-off switch, disconnection switch or electrical outlet. If an electrical
accident occurs, you can then quickly remove power from the system.
• Do not work alone when working with high voltage components.
• Power should always be disconnected from the system when removing or installing main
system components, such as the power supplies and disk drives. When disconnecting power,
you should first power down the operating system and then unplug the power cords. The unit
can have more than one power supply cord. Disconnect all power supply cords before
servicing to avoid electrical shock.
• When working around exposed electrical circuits, another person who is familiar with the
power-off controls should be nearby to switch off the power if necessary.
• Use only one hand when working with powered-on electrical equipment. This is to avoid
making a complete circuit, which will cause electrical shock. Use extreme caution when
using metal tools, which can easily damage any electrical components or circuit boards they
come into contact with.
• Do not use mats designed to decrease static electrical discharge as protection from electrical
shock. Instead, use rubber mats that have been specifically designed as electrical insulators.
• The power supply power cords must include a grounding plug and must be plugged into
grounded electrical outlets or power distribution unit (PDUs).
47