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Cisco MGX 8950 Hardware Installation Guide
Release 3, Part Number 78-14147-02 Rev. A0, November 2002
Chapter 2 Preparing for Installation
Safety Requirements
• If an electrical accident occurs and someone is injured, proceed as follows:
–
Use caution; do not become a victim yourself.
–
Turn off power to 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 Cisco MGX 8950 AC and DC systems within their marked electrical ratings and product
usage instructions.
• Install the Cisco MGX 8950 AC and DC systems with the following local, national, or international
electrical codes:
–
United States—National Fire Protection Association (NFPA70), United States National
Electrical Code
–
Canada—Canadian Electrical Code, Part 1, CSA C22.1
–
Other countries—International Electromechanical Commission (IEC) 364, Part 1 through Part 7
• Cisco MGX 8950 AC models 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.
• Cisco MGX 8950 DC models are equipped with DC PEMs and require you to terminate the DC input
wiring on a DC source capable of supplying at least 100A. A 100A 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. A closed
loop ring is recommended for terminating the ground conductor at the ground stud.
• Other DC power guidelines are as follows:
–
Only a DC power source that complies with the safety extra low voltage (SELV) requirements
of UL 1950, CSA C22.2 No. 950-95, EN 60950, and IEC 950 can be connected to a DC PEM
in the Cisco MGX
8950.
–
A Cisco MGX 8950 equipped with DC PEM(s) is intended for installation only in a restricted
access location. In the United States, a restricted access area is one that is described in
accordance with Articles 110–16, 110–17, and 110–18 of the National Electrical Code
ANSI/NFPA
70.
Preventing ESD Damage
Proper ESD protection is required whenever you handle Cisco equipment. ESD damage, which can occur
when electronic cards or components are improperly handled, results in complete or intermittent
failures. Use an antistatic strap when you are handling equipment. The Cisco MGX 8950 switch ships
with an antistatic wrist strap kit, which you should use when you are handling cards or components.
When used, the strap grounds the user and protects the electronic components from electrostatic shock.
Note The building where you are working should provide enough grounding to prevent damage from
electrostatic discharge. For details, see the
“Bonding and Grounding the Cisco MGX 8950” section on
page C-8.