HP Integrity rx8640 and HP 9000 rp8440 Servers Installation Guide

Figure 33 Voltage Reference Points for IEC-320 C19 Plug
IMPORTANT: Perform these measurements for every power cord that plugs into the server.
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 13 provides single phase voltage measurement examples specific to the geographic region
where these measurements are taken.
Table 13 Single Phase Voltage Examples
Europe
1
North AmericaJapan
230 V208 V or 240 V210 VL1 to L2
230 V120 V105 VL1 to ground
0 V120 V105 VL2 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. See Figure 34 for ground
reference points when performing these measurements.
Cabling and Powering On the Server 51