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 MIL-HDBK-419A
PERFORMANCE EVALUATION PROGRAM
GROUNDING, BONDING, SHIELDING
Date
Evaluation Station
NO
YES
X
1.
Is the resistance to earth of the earth electrode subsystem less than 10 ohms?
MIL-STD-188-124A, 5.1.1.1.3.1
2.
Are the lightning down conductors continuous and welded or brazed to the
X
earth electrode subsystem?
MIL-STD-188-124A, 5.1.1.1.5
Are underground metal pipes entering the facility bonded to the earth
3.
X
electrode subsystem?
MIL-STD-188-124A, 5.1.1.1.6
Was the fall-of-potential method used to measure the earth electrode
4.
a.
X
subsystem?
X
Is the data available for inspection?
b.
MIL-STD-188-124A, 5.1.1.1.7
X
Is there a separate grounding conductor (green wire) for the power system?
5.
a.
X
Is it installed with phase and neutral conductors?
b.
MIL-STD-188-124A, 5.1.1.2.1
X
c.
Is conduit used in lieu of the separate grounding conductor?
MIL-STD-188-124A, 5.1.1.2.5.1
X
Are all non-current carrying metal objects grounded?
6.
MIL-STD-188-124A, 5.1.1.2.1
X
Are all main metallic structural members electrically continuous and grounded?
7.
MIL-STD-188-124A, 5.1.1.2.2
X
8.
Are all metallic piping, tubing and supports electrically continuous and grounded?
MIL-STD-188-124A, 5.1.1.2.3
X
9.
Are all electrical supporting structures electrically continuous and grounded?
MIL-STD-188-124A, 5.1.1.2.4
10.
a.
Is the ac neutral grounded only at the service entrance to the earth
X
electrode subsystem?
X
b.
Is there ac current on the green wire or on the signal reference network?
MIL-STD-188-124A, 5.1.1.2.5; NEC 250-23
2-55
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