Table 2-4 Single Phase Voltage Examples; Figure 2-22 Safety Ground Reference Check - HP Integrity rx7640 Installation Manual

Installing the Server
Cabling and Power Up
Step 11. Measure the voltage between L1 and L2. This is considered to be a phase-to-phase measurement in
North America. In Europe and certain parts of Asia-Pacific, this measurement is referred to as a
phase-to-neutral measurement. The expected voltage should be between 200–240 V AC regardless
of the geographic region.
Step 12. Measure the voltage between L1 and ground. In North America, verify that this voltage is between
100–120 V AC. In Europe and certain parts of Asia-Pacific, verify that this voltage is between
200–240 V AC.
Step 13. Measure the voltage between L2 and ground. In North America, verify that this voltage is between
100–120 VAC. In Europe and certain parts of Asia-Pacific, verify that this voltage is 0 (zero) V AC.
Table 2-4 provides single phase voltage measurement examples dependent on the geographic region where
these measurements are taken.
Table 2-4 Single Phase Voltage Examples
L1-L2 210V
L1-GND 105V
L2-GND 105V
a. In some European countries there may 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 2-22 for ground reference points when
performing these measurements.
Figure 2-22 Safety Ground Reference Check
74
Japan North America
208V or 240V
120V
120V
a
Europe
230V
230V
0V
Chapter 2