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Checking the Ground Connection
Check the impedance of the cabinet ground connection before turning up the cabinet power
system.
Note:
The following procedure does not test the quality of the earth ground circuit (earth
electrode), which should have been installed and tested before the cabinet was installed.
To check the cabinet ground connection
1.
Using an ohm meter, test between the main ground bar and the earth ground wire:
a.
Place one lead on the main cabinet ground bar (located in the splice compartment).
b.
Place the other lead on the earth ground wire.
2.
Verify that the ohm meter reads 5 ohms or less.
3.
If the reading is greater than 5 ohms, check the ground wire connection at the main
ground bar, then retest.
