Floor Loading Considerations; Site Power Guidelines - Cisco ASR 903 Installation Instructions Manual

Floor Loading Considerations

Airflow Guidelines for Enclosed Rack Installation
To install a Cisco ASR 903 Router as a satellite shelf in a 4-post enclosed cabinet, the front and rear doors of
the cabinet must be removed or be perforated with a minimum of 65 percent open area (70 percent for 800-mm
racks).
If you are mounting the chassis in a 4-post enclosed cabinet, ensure that you have a minimum of 6 inches
(15.24 cm) of clearance on each side of the chassis.
Floor Loading Considerations
Ensure that the floor under the rack supporting the Cisco ASR 903 Router as a satellite shelf is capable of
supporting the combined weight of the rack and all the other installed equipment.
To assess the weight of a fully configured Cisco ASR 903 Router as a satellite shelf, see the Cisco ASR 903
System Specifications section.
For additional information about floor loading requirements, consult GR-63-CORE, Network Equipment
Building System (NEBS) Requirements: Physical Protection .

Site Power Guidelines

The Cisco ASR 903 Router as a satellite shelf has specific power and electrical wiring requirements. Adhering
to these requirements ensures reliable operation of the system. Follow these precautions and recommendations
when planning your site power for the Cisco ASR 903 Router as a satellite shelf:
• The redundant power option provides a second, identical power supply to ensure that power to the chassis
• In systems configured with the redundant power option, connect each of the two power supplies to a
• To prevent a loss of input power, be sure that the total maximum load on each circuit supplying the
• Check the power at your site before installation and periodically after installation to ensure that you are
• Provide proper grounding to avoid personal injury and damage to the equipment due to lightning striking
This product requires short-circuit (overturned) protection, to be provided as part of the building installation.
Warning
Install only in accordance with national and local wiring regulations. Statement 1045
Cisco ASR 9000 Series Aggregation Services Router Satellite Systems Installation Guide
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router; the airflow direction is side to side, with ambient air drawn in from the vents located on the front
right of the chassis.
continues uninterrupted if one power supply fails or input power on one line fails.
separate input power source. If you fail to do this, your system might be susceptible to total power failure
due to a fault in the external wiring or a tripped circuit breaker.
power supplies is within the current ratings of the wiring and the breakers.
receiving clean power. Install a power conditioner if necessary.
power lines or due to power surges. The chassis ground must be attached to a central office or other
interior ground system.
Installing the Cisco ASR 903 Router as a Satellite Shelf