Nexus 7K Power Requirements

Answered Question
May 26th, 2010

Hello,

I apologize if this is clearly documented somewhere but I was not able to find an answer. I have a couple Nexus 7ks with 6kW PSUs installed and 30a/208v whips under the cabinet. I know the 7.5kW PSUs require 30A circuits and thus ship with the NEMA 6L-30 cord option. What I can't determine is will the 6kW PSUs run on 30A AC circuits and if so will the same NEMA 6L-30 cord designed for the 7.5kW PSUs work on the 6kW PSUs?

Thanks,

-Matt

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Correct Answer by Giuseppe Larosa about 6 years 6 months ago

Hello Matt,

6 KW power supplies have different AC inputs and use different cables

see

http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9402/ps9512/Data_Sheet_C78-437761.html

6KW

International Electrotechnical Commission (IEC)  320-C19

7,5 KW

IEC 60309 for INT

NEMA L6-30 for US

there are also pictures showing clearly the AC inputs have different shapes

We have recently installed two

here is the sample of sh environment power

sh environment power

Power Supply:

Voltage: 50 Volts

Power                              Actual        Total

Supply    Model                    Output     Capacity    Status

                                 (Watts )     (Watts )

-------  -------------------  -----------  -----------  --------------

1        N7K-AC-6.0KW               512 W       6000 W     Ok

2        N7K-AC-6.0KW               469 W       6000 W     Ok

3        N7K-AC-6.0KW               579 W       6000 W     Ok

                                  Actual        Power

Module    Model                     Draw    Allocated    Status

                                 (Watts )     (Watts )

-------  -------------------  -----------  -----------  --------------

1        N7K-M132XP-12              N/A          750 W    Powered-Up

5        N7K-SUP1                   N/A          210 W    Powered-Up

6        N7K-SUP1                   N/A          210 W    Powered-Up

10       N7K-M132XP-12              N/A          750 W    Powered-Up

Xb1      N7K-C7010-FAB-1            N/A           60 W    Powered-Up

Xb2      N7K-C7010-FAB-1            N/A           60 W    Powered-Up

Xb3      N7K-C7010-FAB-1            N/A           60 W    Powered-Up

Xb4      N7K-C7010-FAB-1            N/A           60 W    Powered-Up

Xb5      N7K-C7010-FAB-1            N/A           60 W    Powered-Up

fan1     N7K-C7010-FAN-S            N/A          720 W    Powered-Up

fan2     N7K-C7010-FAN-S            N/A          720 W    Powered-Up

fan3     N7K-C7010-FAN-F            N/A          120 W    Powered-Up

fan4     N7K-C7010-FAN-F            N/A          120 W    Powered-Up

N/A - Per module power not available

Power Usage Summary:

--------------------

Power Supply redundancy mode (configured)              PS-Redundant

Power Supply redundancy mode (operational)             PS-Redundant

Total Power Capacity (based on configured mode)              12000 W

Total Power of all Inputs (cumulative)                       18000 W

Total Power Output (actual draw)                              1560 W

Total Power Allocated (budget)                                3900 W

Total Power Available for additional modules                  8100 W

Hope to help
Giuseppe
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Correct Answer
Giuseppe Larosa Wed, 05/26/2010 - 11:38

Hello Matt,

6 KW power supplies have different AC inputs and use different cables

see

http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9402/ps9512/Data_Sheet_C78-437761.html

6KW

International Electrotechnical Commission (IEC)  320-C19

7,5 KW

IEC 60309 for INT

NEMA L6-30 for US

there are also pictures showing clearly the AC inputs have different shapes

We have recently installed two

here is the sample of sh environment power

sh environment power

Power Supply:

Voltage: 50 Volts

Power                              Actual        Total

Supply    Model                    Output     Capacity    Status

                                 (Watts )     (Watts )

-------  -------------------  -----------  -----------  --------------

1        N7K-AC-6.0KW               512 W       6000 W     Ok

2        N7K-AC-6.0KW               469 W       6000 W     Ok

3        N7K-AC-6.0KW               579 W       6000 W     Ok

                                  Actual        Power

Module    Model                     Draw    Allocated    Status

                                 (Watts )     (Watts )

-------  -------------------  -----------  -----------  --------------

1        N7K-M132XP-12              N/A          750 W    Powered-Up

5        N7K-SUP1                   N/A          210 W    Powered-Up

6        N7K-SUP1                   N/A          210 W    Powered-Up

10       N7K-M132XP-12              N/A          750 W    Powered-Up

Xb1      N7K-C7010-FAB-1            N/A           60 W    Powered-Up

Xb2      N7K-C7010-FAB-1            N/A           60 W    Powered-Up

Xb3      N7K-C7010-FAB-1            N/A           60 W    Powered-Up

Xb4      N7K-C7010-FAB-1            N/A           60 W    Powered-Up

Xb5      N7K-C7010-FAB-1            N/A           60 W    Powered-Up

fan1     N7K-C7010-FAN-S            N/A          720 W    Powered-Up

fan2     N7K-C7010-FAN-S            N/A          720 W    Powered-Up

fan3     N7K-C7010-FAN-F            N/A          120 W    Powered-Up

fan4     N7K-C7010-FAN-F            N/A          120 W    Powered-Up

N/A - Per module power not available

Power Usage Summary:

--------------------

Power Supply redundancy mode (configured)              PS-Redundant

Power Supply redundancy mode (operational)             PS-Redundant

Total Power Capacity (based on configured mode)              12000 W

Total Power of all Inputs (cumulative)                       18000 W

Total Power Output (actual draw)                              1560 W

Total Power Allocated (budget)                                3900 W

Total Power Available for additional modules                  8100 W

Hope to help
Giuseppe
matthew.mcbride Wed, 05/26/2010 - 12:49

Giuseppe,

Good point. And it does not appear Cisco makes a power cord for the 6kW PSU with the NEMA 6L-30 plug type on the far end. Thanks for your input.

-Matt

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