Floor Loading Considerations; Site Power Guidelines - Cisco ASR-920-24SZ-IM Installation Manual

Chapter 2 Preparing for Installation

Floor Loading Considerations

Ensure that the floor under the rack supporting the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Routers 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 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router, see the
For additional information about floor loading requirements, see the GR-63-CORE, Network Equipment
Building System (NEBS) Requirements: Physical Protection document.

Site Power Guidelines

The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router have 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
920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router:
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This product requires short-circuit (overcurrent) protection to be provided as part of the building
Caution
installation. Install only in accordance with national and local wiring regulations.
The Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router installation must comply
Note
with all the applicable codes, and is approved for use with copper conductors only. The ground
bond-fastening hardware should be of compatible material and preclude loosening, deterioration, and
electrochemical corrosion of hardware and joined material. Attachment of the chassis ground to a central
office or other interior ground system must be made with a 6-AWG gauge wire copper ground conductor
at a minimum.
For information on power specifications, see
Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation Guide
The redundant power option provides a second, identical power supply to ensure that power to the
chassis continues uninterrupted if one power supply fails or input power on one line fails.
Connect each of the two power supplies to a 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.
To prevent a loss of input power, be sure that the total maximum load on each circuit supplying the
power supplies is within the current ratings of the wiring and the breakers.
Check the power at your site before installation, and periodically after installation to ensure that you
are receiving clean power. Install a power conditioner, if necessary.
Provide proper grounding to avoid personal injury and damage to the equipment due to lightning
striking power lines or due to power surges. The chassis ground must be attached to a central office
or other interior ground system.
Table 1-3.
Table 1-4.
Site Planning
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