Catalyst 6500 Series Switches Installation Guide - Ipland
Catalyst 6500 Series Switches Installation Guide - Ipland Catalyst 6500 Series Switches Installation Guide - Ipland
Power Requirements Chapter 2 Preparing for Installation Power Requirements When preparing your site for the switch installation, follow these requirements: • In systems configured with two power supplies, 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 source circuit is within the current ratings of the wiring and breakers. • In some systems, you may decide to use an uninterruptible power supply (UPS) to protect against power failures at your site. Be aware when selecting a UPS that some UPS models that use ferroresonant technology can become unstable when operating with the Catalyst 6500 series switch power supplies which use power factor correction (PFC). This can cause the output voltage waveform to the switch to become distorted resulting in an undervoltage situation in the system. • The AC-input power supply has a detachable power cord (except for the 4000 W power supplies) that allows you to connect each power supply to the site power source. The 4000 W AC-input power supply power cords are hard-wired to the power supply and cannot be removed. • You can connect the DC-input power supply to the power source with heavy-gauge wiring connected to a terminal block. The wire gauge size is determined by local electrical codes and restrictions. • If you are using a 200/240 VAC power source in North America, the circuit must be protected by a two-pole circuit breaker. • The source AC outlet must be within 6 feet (1.8 meters) of the system and should be easily accessible. • The AC power receptacles used to plug in the chassis must be the grounding type. The grounding conductors that connect to the receptacles should connect to protective earth ground at the service equipment. Power Connection Guidelines for AC-Powered Systems This section provides the basic guidelines for connecting the Catalyst 6500 series switch AC power supplies to the site power source: • Each chassis power supply should have a separate, dedicated branch circuit. • For North America: – The 950 W power supply requires a 15 A circuit. – The 1000 W power supply requires a 15 A or 20 A circuit. – The 1300 W, 1400 W, 2500 W, 2700 W, and 3000 W power supplies require a 20 A circuit. – The 4000 W power supply requires a 30 A circuit. – The 6000 W power supply requires one or two 20 A circuits. – The 8700 W power supply requires one, two, or three 20 A circuits. 2-22 Catalyst 6500 Series Switches Installation Guide OL-5781-08
Chapter 2 Preparing for Installation Power Requirements • For International: – Circuits should be sized according to local and national codes. • If you are using a 200/240 VAC power source in North America, the circuit must be protected by a two-pole circuit breaker. • The source AC outlet must be within 6 feet (1.8 meters) of the system and should be easily accessible. • The AC power receptacles used to plug in the chassis must be the grounding type. The grounding conductors that connect to the receptacles should connect to protective earth ground at the service equipment. Power Connection Guidelines for DC-Powered Systems This section provides the basic guidelines for connecting the Catalyst 6500 series switch DC-input power supplies to the site power source: • All power connection wiring should conform to the rules and regulations in the National Electrical Code (NEC), as well as any local codes. • The DC return must remain isolated from the system frame and the chassis (DC-I). • For DC power cables, we recommend that you use commensurately rated, high-strand-count copper wire cable. Connection to the DC-input power supply requires one earth ground cable, one source DC (–), and one source DC return (+). The length of the cables depends on your switch location. These cables are not available from Cisco Systems. They are available from any commercial cable vendor. • The color coding of the source DC power cable leads depends on the color coding of the site DC power source. Typically, green or green and yellow indicate that the cable is a ground cable. Because there is no color code standard for source DC wiring, you must ensure that the power cables are connected to the DC-input power supply terminal block in the proper (+) and (–) polarity. In some cases, the source DC cable leads might have a positive (+) or a negative (–) label. This label is a relatively safe indication of the polarity, but you must verify the polarity by measuring the voltage between the DC cable leads. When making the measurement, the positive (+) lead and the negative (–) lead must always match the (+) and (–) labels on the DC-input power supply terminal block. • DC power cables must be terminated by cable lugs at the power supply end. • The circuit breaker is considered to be the disconnect device and should be easily accessible. • The circuit must be protected by a dedicated two-pole circuit breaker. The circuit breaker should be sized according to the power supply input rating and local or national code requirements. • For proper DC-input redundant power configurations on systems with multiple-input DC-input power supplies, all pairs of source DC cables for one DC-input power supply must come from the same battery system (A feed); all pairs of source DC cables for the second DC-input power supply must come from a different battery system (B feed). • For DC-input power supplies with multiple inputs, each DC input must be protected by a dedicated circuit breaker or a fuse. The circuit breaker or the fuse must be sized according to the power supply input rating and local or national electrical codes. OL-5781-08 Catalyst 6500 Series Switches Installation Guide 2-23
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Power Requirements<br />
Chapter 2<br />
Preparing for <strong>Installation</strong><br />
Power Requirements<br />
When preparing your site for the switch installation, follow these requirements:<br />
• In systems configured with two power supplies, connect each of the two power supplies to a separate<br />
input power source. If you fail to do this, your system might be susceptible to total power failure<br />
due to a fault in the external wiring or a tripped circuit breaker.<br />
• To prevent a loss of input power, be sure that the total maximum load on each source circuit is within<br />
the current ratings of the wiring and breakers.<br />
• In some systems, you may decide to use an uninterruptible power supply (UPS) to protect against<br />
power failures at your site. Be aware when selecting a UPS that some UPS models that use<br />
ferroresonant technology can become unstable when operating with the <strong>Catalyst</strong> <strong>6500</strong> series switch<br />
power supplies which use power factor correction (PFC). This can cause the output voltage<br />
waveform to the switch to become distorted resulting in an undervoltage situation in the system.<br />
• The AC-input power supply has a detachable power cord (except for the 4000 W power supplies)<br />
that allows you to connect each power supply to the site power source. The 4000 W AC-input power<br />
supply power cords are hard-wired to the power supply and cannot be removed.<br />
• You can connect the DC-input power supply to the power source with heavy-gauge wiring connected<br />
to a terminal block. The wire gauge size is determined by local electrical codes and restrictions.<br />
• If you are using a 200/240 VAC power source in North America, the circuit must be protected by a<br />
two-pole circuit breaker.<br />
• The source AC outlet must be within 6 feet (1.8 meters) of the system and should be easily<br />
accessible.<br />
• The AC power receptacles used to plug in the chassis must be the grounding type. The grounding<br />
conductors that connect to the receptacles should connect to protective earth ground at the service<br />
equipment.<br />
Power Connection <strong>Guide</strong>lines for AC-Powered Systems<br />
This section provides the basic guidelines for connecting the <strong>Catalyst</strong> <strong>6500</strong> series switch AC power<br />
supplies to the site power source:<br />
• Each chassis power supply should have a separate, dedicated branch circuit.<br />
• For North America:<br />
– The 950 W power supply requires a 15 A circuit.<br />
– The 1000 W power supply requires a 15 A or 20 A circuit.<br />
– The 1300 W, 1400 W, 2500 W, 2700 W, and 3000 W power supplies require a 20 A circuit.<br />
– The 4000 W power supply requires a 30 A circuit.<br />
– The 6000 W power supply requires one or two 20 A circuits.<br />
– The 8700 W power supply requires one, two, or three 20 A circuits.<br />
2-22<br />
<strong>Catalyst</strong> <strong>6500</strong> <strong>Series</strong> <strong>Switches</strong> <strong>Installation</strong> <strong>Guide</strong><br />
OL-5781-08