Ground (Earth) Integrity - GE Dash D 0 0005 G Series Service Manual

Ground (Earth) Integrity

Ground Continuity Test
3-8
Maintenance: Electrical Safety Tests
Listed below are two methods for checking the ground (earth) integrity,
"Ground Continuity Test" and "Impedance of Protective Earth
Connection." These tests determine whether the device's exposed metal
and power inlet's earth (ground) connection has a power ground fault
condition.
Perform the test method below that is required by your Country/Local
governing safety organization.
Completion of this test is checked by the following steps:
1. Disconnect the DUT (device under test) from the wall receptacle.
2. Connect the negative(-) lead of the ohm meter to the protective earth
terminal (ground pin in power in-let connector) or the protective
earth pin in the MAINS PLUG (ground pin in power cord). Refer to
the US 120Vac power cord figure on the left.
3. Set the Ohm meter to the milliohm (m Ω ) range.
4. Connect the positive (+) lead of the Ohm meter to all exposed metal
surfaces on the DUT. If the metal surfaces are anodized or painted
scrape off a small area in a inconspicuous area for the probe to make
contact with the metal.
5. Resistance should read to pass:
‹
0.1 ohm or less without power cord
‹
0.2 ohms or less with power cord
Dash Port Docking Station
2000966-037
Revision B