Table 2-4. Single Phase Voltage Examples; Figure 2-23. Safety Ground Reference Check - Single Power Source - HP Integrity rx8640 Installation Manual

Table 2-4 provides single phase voltage measurement examples specific to the geographic region where these
measurements are taken.
Table 2-4 Single Phase Voltage Examples
L1 to L2 210 V
L1 to ground 105 V
L2 to ground 105 V
a. 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
Step 1. Measure the voltage between A0 and A1 as follows:
1. Take the AC voltage down to the lowest scale on the volt meter.
Chapter 2
Japan North America
208 V or 240 V
120 V
120 V
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.
Cabling and Powering On the Server
a
Europe
230 V
230 V
0 V
Installing the System
75