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 MIL-HDBK-1023/4
(2) Figure 38 illustrates troubleshooting a grounded open using the "Ground Return
Method." Prior to this test each load cable should be meggered to ground. The cable with the
highest resistance to ground should be disconnected. The ground return ground should be
connected to the regulator in its place. In determining which cable to disconnect, this same
procedure should be followed when using the "Ground Return Switch."
= ON
= DIM
= OFF
L2
L1
L2
ON
REGULATOR
GROUND.
MEGGER LOAD CABLES L1 AND L2 PRIOR TO CONNECTING GROUND.
CONNECT GROUND TO REGULATOR OUTPUT IN PLACE OF CABLE WITH
HIGHEST RESISTANCE TO GROUND.
ONE LOAD CABLE SHOULD HAVE AT LEAST MED TO HIGH RESISTANCE
TO GROUND.
HIGH VOLTAGES EXISTS ON CABLE L2. TAPE EXPOSED CONDUCTOR
PRIOR TO ENERGIZING.
Figure 38
Grounded Open on Load Circuit Ground Return Method
104
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