HP rp8440 Installation Guide, Fourth Edition - HP Integrity rx8640, HP 9000 rp - Page 63

Verifying the Safety Ground (Single Power Source), SHOCK HAZARD

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Table 2-4 Single Phase Voltage Examples Japan North America L1 to L2 210 V 208 V or 240 V L1 to ground 105 V 120 V L2 to ground 105 V 120 V 1 In some European countries, there might not be a polarization. Europe1 230 V 230 V 0V Verifying the Safety Ground (Single Power Source) Use this procedure to measure the voltage level between A0 and A1. It also verifies the voltage level between B0 and B1. Take measurements between ground pins. Refer to Figure 2-23 for ground reference points when performing these measurements. Figure 2-23 Safety Ground Reference Check - Single Power Source 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. 1. Measure the voltage between A0 and A1 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 A0. 3. Insert the other probe into the ground pin for A1. 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. Cabling and Powering On the Server 63

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Table 2-4 Single Phase Voltage Examples
Europe
1
North America
Japan
230 V
208 V or 240 V
210 V
L1 to L2
230 V
120 V
105 V
L1 to ground
0V
120 V
105 V
L2 to ground
1
In some European countries, there might not be a polarization.
Verifying the Safety Ground (Single Power Source)
Use this procedure to measure the voltage level between A0 and A1. It also verifies the voltage
level between B0 and B1. Take measurements between ground pins. Refer to
Figure 2-23
for
ground reference points when performing these measurements.
Figure 2-23
Safety Ground Reference Check — Single Power Source
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.
1.
Measure the voltage between A0 and A1 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 A0.
3.
Insert the other probe into the ground pin for A1.
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.
Cabling and Powering On the Server
63