Cisco IPS-4255-K9 Installation Guide - Page 49

Chapter 1 Introducing the Sensor Site and Safety Guidelines Electrical Safety Guidelines Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units. Follow these guidelines when working on equipment powered by electricity: • Before beginning procedures that require access to the interior of the chassis, locate the emergency power-off switch for the room in which you are working. Then, if an electrical accident occurs, you can act quickly to turn off the power. • Do not work alone if potentially hazardous conditions exist anywhere in your work space. • Never assume that power is disconnected from a circuit; always check the circuit. • Look carefully for possible hazards in your work area, such as moist floors, ungrounded power extension cables, frayed power cords, and missing safety grounds. • If an electrical accident occurs, proceed as follows: - Use caution; do not become a victim yourself. - Disconnect power from the system. - If possible, send another person to get medical aid. Otherwise, assess the condition of the victim and then call for help. - Determine if the person needs rescue breathing or external cardiac compressions; then take appropriate action. • Use the chassis within its marked electrical ratings and product usage instructions. • Install the sensor in compliance with local and national electrical codes as listed in Regulatory Compliance and Safety Information for the Cisco Intrusion Prevention System 4200 Series Appliance Sensor. • The sensor models equipped with AC-input power supplies are shipped with a 3-wire electrical cord with a grounding-type plug that fits only a grounding-type power outlet. This is a safety feature that you should not circumvent. Equipment grounding should comply with local and national electrical codes. • The sensor models equipped with DC-input power supplies must be terminated with the DC input wiring on a DC source capable of supplying at least 15 amps. A 15-amp circuit breaker is required at the 48 VDC facility power source. An easily accessible disconnect device should be incorporated into the facility wiring. Be sure to connect the grounding wire conduit to a solid earth ground. We recommend that you use a Listed closed-loop ring to terminate the ground conductor at the ground stud. The DC return connection to this system is to remain isolated from the system frame and chassis. Other DC power guidelines are listed in Regulatory Compliance and Safety Information for the Cisco Intrusion Prevention System 4200 Series Appliance Sensor. OL-18504-01 Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.0 1-31