Silicon Graphics Origin 300 User Manual page 64

2: Installation Procedures
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For international sites, use the following procedure to ensure that a single-phase power
receptacle is properly wired:
1. Set the voltmeter to a high AC voltage range.
2. Check the voltage between socket 1 and socket 2 (refer to Figure 2-2). The meter
should read between 200 and 240 Vac.
3. Check the voltage between socket 1 (line) and the ground socket. The meter should
read between 200 and 240 Vac.
4. Check the voltage between socket 2 (neutral) and the ground socket. The meter
should read approximately 0 Vac.
5. Check the voltage between the ground socket and an earth-ground location. The
meter should read 0 Vac.
6. Change the voltmeter to a low-resistance setting.
7. Measure between the ground socket and an appropriate earth-ground location and
ensure that resistance is less than 1 ohm.
8. Repeat Steps 1 through 7 for any additional single-phase power receptacles.
Caution: If a voltage reading is incorrect or if the resistance that is measured in Step 7 is
more than 1 ohm, contact a site-approved electrician. Do not proceed with the
installation procedure.
007-4498-002