Alcatel-Lucent 7750 SR-a4, Installation Manual, Page: 92 / 232

Warnings and Notes
92 7750 SR-a4 and SR-a8 Installation Guide
Warnings and Notes
Danger:
• Only trained and qualified personnel should install or replace this equipment and
connect the power cables.
• Confirm that the DC power source is OFF during installation. The power source should
be a safety extra-low voltage (SELV) source.
• Turn off power at the power source before you install or remove power cords.
• Before working on equipment that is connected to power, remove jewelry, such as rings,
necklaces, and watches. When metal objects are in contact with power and ground,
serious burns can occur or the objects can be welded to the terminals.
• Make all ground connections first.
• The router and equipment rack must be correctly grounded.
• You must use power cables that meet the local electrical code requirements.
• This product relies on the building’s installation for short-circuit (overcurrent) protection.
For AC powered systems, ensure that a circuit breaker, or other equivalent means,
rated 20 A, is used in the building’s AC branch circuit for the current carrying
conductors.
• For DC powered systems, the unit should be connected to a DC branch circuit with a
maximum 60 A circuit breaker that meets the requirements for branch circuit protection.
A suitable disconnect device must be provided in the DC branch, either a circuit breaker
or switch that can disconnect power from the system during servicing.
Warning:
• Impedance panels are required in all empty slots to prevent excess dust accumulation
and to help control airflow and electromagnetic interference. Impedance panels do not
have board components or connector pins.
• Electrostatic discharge (ESD) damage can occur if components are mishandled.
Always wear an ESD-preventive wrist or ankle strap and always connect an ESD strap
to the grounding plug on the front of the chassis.
• Do not install equipment that appears to be damaged.