4. Measure the voltage between A1 and B1 as follows:
1. Take the AC voltage down to the lowest scale on the volt meter.
2. Insert the probe into the ground pin for A1.
3. Insert the other probe into the ground pin for B1.
4. Verify that the measurement is between 0-5 V AC.
If the measurement is 5 V or greater, escalate the situation. Do not attempt to plug the power
cord into the server cabinet.
Voltage Check (Additional Procedure)
The voltage check ensures that all phases (and neutral, for international systems) are connected
correctly to the cabinet and that the AC input voltage is within limits.
Perform this procedure if the previous voltage check procedure did not yield the expected results.
NOTE: If you use an uninterrupted power supply (UPS), refer to the applicable UPS
documentation for information on connecting the server and checking the UPS output voltage.
UPS user documentation is shipped with the UPS. Documentation is also available at:
http://www.hp.com/racksolutions
1. Verify that site power is OFF.
2. Open the site circuit breakers.
3. Verify that the receptacle ground connector is connected to ground. Refer to Figure 3-24 for
connector details.
4. Set the site power circuit breaker to ON.
Figure 3-24 Wall Receptacle Pinouts
WARNING! SHOCK HAZARD
Risk of shock hazard while testing primary power.
Use properly insulated probes.
Be sure to replace access cover when finished testing primary power.
5. Verify that the voltage between receptacle pins X and Y is between 200 and 240V AC.
6. Set the site power circuit breaker to OFF.
Cabling and Power Up 71
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