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Cisco MGX 8850 Multiservice Switch Installation and Configuration
Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005
Chapter 3 Site Preparation
Maintaining Safety with Electricity
• Install the MGX 8850 AC or MGX 8850 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.
• MGX 8850 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.
• MGX 8850 DC models are equipped with DC power entry modules and require you to terminate the
DC input wiring on a DC source capable of supplying at least 60 amps. A 60-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. A closed loop ring is recommended to terminate the ground conductor at the ground stud.
• Other DC power guidelines are
–
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 an MGX 8850
DC-input power entry module.
–
MGX 8850 DC which is equipped with DC power entry modules is intended only for
installation in a restricted access location. In the United States, a restricted access area is in
accordance with Articles 110-16, 110-17, and 110-18 of the National Electrical Code
ANSI/NFPA 70.
Warning Definition
Warning
Means danger. You are in a situation that could cause bodily injury. Before you work on any
equipment, be aware of the hazards involved with electrical circuitry and be familiar with
standard practices for preventing accidents.
Waarschuwing
Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel
kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van
de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van standaard
maatregelen om ongelukken te voorkomen.
Varoitus
Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan.
Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä
vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista.
Attention
Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant
causer des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez
conscient des dangers posés par les circuits électriques et familiarisez-vous avec les
procédures couramment utilisées pour éviter les accidents.