The Cisco NCS 6008 LCC and Cisco NCS 6000 FCC each contain DC power trays.

• The LCC has six DC power trays.

  The upper three DC power trays (0–2) are contained within power shelf 0 (PS0), and the lower three DC power trays (3–5) are contained within power shelf 1 (PS1) . Each power shelf has a power control module (PCM) with its own 1/0 power switch. Each DC power tray has four slots for DC PMs.

• The FCC has four power trays.

  The upper two power trays (0–1) are contained within power shelf 0 (PS0), and the lower two power trays (2–3) are contained within power shelf 1 (PS1) . Each set of power trays has a power control module (PCM) with its own I/O power switch. Each DC power tray has four slots for DC PMs.

Note	The DC power trays for the LCC and FCC are field-replaceable. The PMs are hot-swappable.

In addition to the requirements described in the General Power and Grounding Requirements, DC input power requirements are as follows:

• Each DC power tray requires up to four DC input feeds of either –48 VDC (nominal), 50 A or –60 VDC (nominal), 40 A. The power tray accepts input DC power in the range –40 to –72 VDC.

• To operate the system with N+N DC power redundancy requires access to the "A" and "B" power busses at the Central Office (CO). This dual connectivity provides N+N power redundancy in case a power source fails.

  • CO “A” power connected to power trays 0, 1, and 2, with up to four –48/–60 VDC inputs per power tray.

  • CO “B” power connected to power trays 3, 4, and 5, with up to four –48/–60 VDC inputs per power tray.

• Required input current is as follows:

  • 50 A at –48 VDC nominal input voltage.

  • 40 A at –60 VDC nominal input voltage.

  • 60 A at minimum input voltage (–40 VDC).

• An “allpole” separation of the power source is not required. The DC PM is an isolated DC/DC converter with no galvanic connection between “L+” and the chassis. In addition, the “L+” potentials of each PM are isolated from each other.

• All power connection wiring must conform to the rules and regulations in the National Electrical Code (NEC) and any local codes. In addition, make sure that the wiring conforms to any internal requirements at the installation site.

• Each DC power source must comply with the safety extra-low voltage (SELV) requirements in UL 60950-1, CSA-C22.2 No. 60950-1, EN60950-1, AS/NZS 60950, and IEC60950-1.

• A DC-powered system should be installed in a restricted access area in accordance with the National Electric Code, ANSI/NFPA 70.

• All components in the area where DC input power is accessible must be properly insulated.

Each power tray contains four pairs of double-stud terminals (RTN, –48V/–60V) for connecting DC input power. Each power tray contains up to four PMs.

The requirements for the DC input power connections are as follows:

• For DC input power cables, select the appropriate wire gauge based on the National Electrical Code (NEC) and local codes for –48 VDC (nominal), 50 A DC input voltage, or –60 VDC (nominal), 40 A DC input voltage. Up to four pairs of cable leads, source DC (–) and source DC return (+), are required for each power tray, depending on the number of DC PMs installed. These cables are available from any commercial cable vendor. All input power cables for the chassis should have the same wire gauge and cable lengths should match within 10 percent of deviation.

• Each DC input power cable is terminated at the power tray by a 90 degree cable lug. The terminal block lug opening width is 0.62 inches (15.75 mm). The terminal posts are centered 0.63 inches (16 mm) apart and are 1/4-20 thread.

We recommend that you use a 90-degree angle, industry-standard, dual-hole, standard barrel compression lug. See figure below.

Figure 4. 90-Degree DC Input Power Cable Lug

Note	Use local electrical codes for clearance requirements when using power lugs to ensure safe operation.

Note	In the DC power system, the power wire connectors have a torque value of 45 to 55 in-lb (5.1 to 6.2 N-m).

The following figure shows the DC input power cables connected to the DC power tray terminal block on the LCC.

Figure 5. DC Power Tray Power Cable Connections (LCC)

The following figure shows the DC input power cables connected to the DC power tray terminal block on the FCC.

Figure 6. DC Power Tray Power Cable Connections (FCC)

An AC-powered LCC has six AC power trays. The upper three AC power trays (0–2) are contained within power shelf 0 (PS0), and the lower three AC power trays (3–5) are contained within power shelf 1 (PS1). Each power shelf has a PCM with its own1/0 power switch. Each AC power tray has three slots for PMs.

An AC-powered FCC has four power trays. The upper two power trays (0–1) are contained within power shelf 0 (PS0), and the lower three power trays (2–3) are contained within power shelf 1 (PS1). Each AC power tray has three slots for PMs.

In addition to the requirements in the General Power and Grounding Requirements, AC input power requirements are as follows:

• Two separate and independent AC power sources are required to provide N+N power redundancy in case a power source fails.

• Each AC PM requires its own single-phase AC input power feed, with it's own circuit breaker.

• 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.

• AC single-phase input:

  • Single-phase, 200 to 240 VAC nominal, 50 to 60 Hz.

  • Each AC power tray contains three IEC-320-C22 receptacles, which can accept up to three IEC-320-C21 connector female plugs, depending on how many AC PMs are installed in the tray.

• The AC power system requires single-phase AC input power to each PM. If you have 3-phase AC Delta or AC Wye at your equipment, a Cisco NCS 3-phase AC PDU is required to convert 3-phase AC input power to single-phase AC input power (Cisco PID NCS-PDU-DELTA or NCS-PDU-WYE). For more information, refer to the Cisco 3-Phase AC Power Distribution Unit Installation Guide on Cisco.com.

Note	If you have a 3-Phase AC PDU installed, we recommend you install three AC PMs in each AC power tray to maintain a balanced 3-phase power load.

For detailed AC power specifications, see the “LCC Power Specifications” section and the “FCC Power Specifications” section .

The AC power tray is shipped with AC power cords. Each AC power tray accepts up to three power cords. Each AC power cord has a different plug type, depending on locale. AC power cords are available for the locales listed in the table.

Figure 7. North America—AC Input Power Cord

Figure 8. Europe—AC Input Power Cord

Figure 9. United Kingdom—AC Input Power Cord

Figure 10. Italy—AC Input Power Cord

Figure 11. Australia—AC Input Power Cord

Note	The AS 3112 standard rates cord sets up to a maximum of 15 A, 250 VAC for the C21 plug. Therefore the building circuit breaker must be 15-A maximum. Installation of the Cisco NCS 6000 Series chassis must follow national and local electrical codes.

Figure 12. Japan—AC Input Power Cord

Figure 13. Switzerland—AC Input Power Cord

Figure 14. South Africa—AC Input Power Cord

Figure 15. Israel—AC Input Power Cord

Figure 16. China—AC Input Power Cord

Figure 17. Brazil—AC Input Power Cord

This figure shows the AC input power cables plugged into the AC power trays.

Figure 18. AC Power Tray Power Cable Connections—LCC Shown

If you have 3-phase AC Delta or AC Wye input power at your equipment, a Cisco NCS 3-phase AC PDU is required to convert 3-phase AC Delta or AC Wye input power to single-phase AC input power that connects directly to the rear of each PM. The Cisco NCS PDU includes either an AC Delta (Cisco PID NCS-PDU-DELTA) or AC Wye (Cisco PID NCS-PDU-WYE) power interface, and has power input and power output cords entering and exiting the box (Single AC PDU—Front and Rear). An optional mounting bracket is available for mounting the PDUs on both sides of the chassis.

Note	The overall width of both the LCC and FCC with the AC PDU brackets installed is 35.3 in. (89.7 cm).

For more information on AC PDUs, refer to the Cisco CRS 3-Phase AC Power Distribution Unit Installation Guide on Cisco.com.

This figure shows a single AC Delta PDU. The single AC Wye PDU is similar.

Figure 19. Single AC PDU—Front and Rear

This figure shows the airflow through the LCC.

Figure 22. Airflow Through the Cisco NCS 6008 LCC

This figure shows the airflow through the FCC.

Figure 23. Airflow Through the Cisco NCS 6000 FCC