Electrical Circuit Requirements; Site Cabling Guidelines - Cisco ASR-920-8S4Z-PD Hardware Installation Manual

Preparing for Installation
• Connect each of the two power supplies to a separate input power source. If you fail to do this, your
• To prevent a loss of input power, be sure that the total maximum load on each circuit supplying the power
• 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
Caution
This product requires short-circuit (overcurrent) protection to be provided as part of the building installation.
Install only in accordance with national and local wiring regulations.
Note
The Cisco ASR 920-10SZ-PD and Cisco ASR-920-8S4Z-PD Routers installation must comply 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

Electrical Circuit Requirements

Each router requires a dedicated electrical circuit. If you equip the router with dual-power feeds, provide a
separate circuit for each power supply to avoid compromising the power redundancy feature.
The routers can be powered by a DC source. Ensure that equipment grounding is present and observe the
power-strip ratings. Make sure that the total ampere rating of all the products plugged into the power strip
does not exceed 80% of the rating.

Site Cabling Guidelines

This section contains guidelines for wiring and cabling at your site. When preparing your site for network
connections to the router, consider the type of cable required for each component, and the cable limitations.
Consider the distance limitations for signaling, electromagnetic interference (EMI), and connector compatibility.
Possible cable types are fiber, thick or thin coaxial, foil twisted-pair, or unshielded twisted-pair cabling.
Also consider any additional interface equipment you need, such as transceivers, hubs, switches, modems,
channel service units (CSU), or data service units (DSU).
Before you install the router, have all the additional external equipment and cables on hand. For information
about ordering, contact a Cisco customer service representative.
The extent of your network and the distances between the network interface connections depend, in part, on
the following factors:
• Signal type
• Signal speed
Cisco ASR 920-10SZ-PD and Cisco ASR-920-8S4Z-PD Aggregation Services Router Hardware Installation Guide
system might be susceptible to total power failure due to a fault in the external wiring or a tripped circuit
breaker.
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.
Power Supply.
Electrical Circuit Requirements
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