IBM 4002AC2, Installation And User Manual

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DANGER
If the receptacle has a metal shell, do not touch the shell until
you have completed the voltage and grounding checks. Improper
wiring or grounding could place dangerous voltage on the metal
shell. If any of the conditions are not as described, STOP. Ensure
the improper voltage or impedance conditions are corrected
before proceeding. (D003)
DANGER
An electrical outlet that is not correctly wired could place
hazardous voltage on metal parts of the system or the devices
that attach to the system. It is the responsibility of the customer
to ensure that the outlet is correctly wired and grounded to
prevent an electrical shock. (D004)
The following general electrical danger notice provides instructions on how to avoid
shock hazards when servicing equipment. Unless instructed otherwise, follow the
procedures in this danger notice.
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IBM x-series of Ethernet Switches Installation and User Guide