Understanding The Power Requirements; Understanding The Grounding Requirements - Cisco 7541 Hardware Installation Manual

Chapter 2 Preparing to Install the WAVE-7541, WAVE-7571, and WAVE-8541

Understanding the Power Requirements

Installation of this equipment must comply with local and regional electrical regulations governing the
installation of information technology equipment by licensed electricians. This equipment is designed
to operate in installations covered by NFPA 70, 1999 Edition (National Electric Code) and NFPA-75,
1992 (code for Protection of Electronic Computer/Data Processing Equipment).
Take care when connecting units to the supply circuit so that wiring is not overloaded.
Warning
Statement 1018
Caution
Protect the WAVE appliance from power fluctuations and temporary interruptions with a regulating
uninterruptible power supply (UPS). This device protects the hardware from damage caused by power
surges and voltage spikes and keeps the system in operation during a power failure.
When installing more than one WAVE appliance, you may need to use additional power distribution
devices to safely provide power to all devices. Observe the following guidelines:
•
•
•
•
For details about the WAVE-7541, WAVE-7571, and WAVE-8541 power requirements, see
"WAVE-7541, WAVE-7571, and WAVE-8541 Hardware Specifications."

Understanding the Grounding Requirements

To ensure proper operation and safety, you must properly ground the WAVE appliance. In the United
States, install the equipment in accordance with NFPA 70, 1999 Edition (National Electric Code),
Article 250, as well as any local and regional building codes. In Canada, you must install the equipment
in accordance with Canadian Standards Association, CSA C22.1, Canadian Electrical Code. In all other
countries, you must install the equipment in accordance with any regional or national electrical wiring
codes, such as the International Electrotechnical Commission (IEC) Code 364, parts 1 through 7.
Furthermore, you must be sure that all power distribution devices used in the installation, such as branch
wiring and receptacles, are listed or certified grounding-type devices.
Because of the high ground-leakage currents associated with multiple WAVE appliances connected to
the same power source, we recommend the use of a PDU that is either permanently wired to the
building's branch circuit or includes a nondetachable cord that is wired to an industrial-style plug.
NEMA locking-style plugs or those complying with IEC 60309 are considered suitable for this purpose.
Using common power outlet strips for the WAVE appliance is not recommended.
Balance the WAVE appliance power load between available AC supply branch circuits.
Do not allow the overall system AC current load to exceed 80 percent of the branch circuit AC
current rating.
Do not use common power outlet strips for this equipment.
Provide a separate electrical circuit for the WAVE appliance.
Cisco Wide Area Virtualization Engine 7541, 7571, and 8541 Hardware Installation Guide
Understanding the Power Requirements
Appendix A,
2-5