HP Integrity rx7640 and HP 9000 rp7440 Servers User Service Guide

1. 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.
2. 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.
3. 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 19 provides single phase voltage measurement examples dependent on the geographic
region where these measurements are taken.
Table 19 Single Phase Voltage Examples
Europe
1
North AmericaJapan
230V208V or 240V210VL1-L2
230V120V105VL1-GND
0V120V105VL2-GND
1
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. See Figure 32 (page 57) for
ground reference points when performing these measurements.
56 Installing the Server