Table of Contents
Advertisement
Important Safety Instructions,
Grounding
This section provides instructions for verifying that the equipment is properly grounded.
Safety Plugs (USA Only)
Depending on the type and application of this equipment (Safety Class I or Safety Class II),
Cisco supplies a mains cord with either a 3-terminal (grounding-type) safety plug or a
2-terminal (polarized) safety plug. The wide blade or the third terminal is provided for
safety. Do not defeat the safety purpose of the grounding-type or polarized safety plug.
To properly ground this equipment, follow these safety guidelines:
• Grounding-Type Plug - For a three-terminal plug (one terminal on this plug is a
protective grounding pin), insert the plug into a grounded mains, three-terminal outlet.
Note: This plug fits only one way. If this plug cannot be fully inserted into the outlet,
contact an electrician to replace the obsolete three-terminal outlet.
• Polarized Plug - For a two-terminal plug (a polarized plug with one wide blade and one
narrow blade), insert the plug into a polarized mains, two-terminal outlet in which one
socket is wider than the other.
Note: If this plug cannot be fully inserted into the outlet, try reversing the plug. If the
plug still fails to fit, contact an electrician to replace the obsolete two-terminal outlet.
Grounding Terminal
If this equipment is equipped with an external grounding terminal, attach one end of an 18-
gauge wire (or larger) to the grounding terminal; then, attach the other end of the wire to a
ground, such as a grounded equipment rack.
Safety Plugs (European Union)
• Class I Mains Powered Equipment - Provided with a three-terminal AC inlet and
requires connection to a 3-terminal mains supply outlet via a three-terminal power cord
for proper connection to the protective ground.
Note: The equipotential bonding terminal provided on some equipment is not designed
to function as a protective ground connection.
• Class II Mains Powered Equipment - Provided with a two-terminal AC inlet that may be
connected by a two-terminal power cord to the mains supply outlet. No connection to the
protective ground is required as this class of equipment is provided with double or
reinforced and/or supplementary insulation in addition to the basic insulation provided
in Class I equipment.
Note: Class II equipment, which is subject to EN 50083-1, is provided with a chassis
mounted equipotential bonding terminal. See the section titled Equipotential Bonding
for connection instructions.
Equipotential Bonding
If this equipment is equipped with an external chassis terminal marked with the IEC 60417-
5020 chassis icon (
standard IEC 60728-11 for correct equipotential bonding connection instructions.
4020024 Rev C
Continued
), the installer should refer to CENELEC standard EN 50083-1 or IEC
xi
Advertisement
Table of Contents
