MIL-HDBK-1022A
2.10.3.2 Current and Lightning Protection. Provide lightning
protection in accordance with Corps TM 5-811-3, AFMAN 88-9,
NFPA 780, MIL-HDBK-1004/6, and local installation
requirements. For fault current protection and lightning
protection, ground the following items through ground rods or
beds or bond to a grounded network. Provide ground for these
items as required by the above references.
a) Substation fences.
b) Lightning arrestors and lightning shield conductors.
c) Operating mechanisms of overhead airbreak switches.
d) Canopies.
e) Aboveground storage tanks.
2.10.3.3 Static Electricity Prevention. To prevent static
electricity, ground the following items directly through
ground rods or beds or bonded to a grounded network. Do not
exceed 10,000 ohms of resistance to ground for the following
items:
a) Tanks, vessels, stacks, heat exchangers, and similar
equipment not directly supported or bolted to a grounded
supporting network.
b) Pipe support columns at intervals normally not
exceeding 75 feet (23 m).
c) Aircraft direct fueling stations.
d)
Hydrant pits.
e) Internal floating pans bonded to the storage tank
shell.
f) Aboveground portions of electrically isolated piping
at truck, rail, and marine loading and unloading stations.
2.10.3.4 Installation. Isolate grounding systems for
instrumentation, instrument control boards, and electronic
equipment from all other ground systems. Additional grounding
is not required for overhead electrical equipment bolted
22
Previous Page
