NOTE: Add reference to IEC 60265-1 for projects
located in Europe only after verifying that at least
three manufacturers of this switchgear comply with
this standard.
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Furnish reports which include results of design and production tests
performed according to NEMA C37.72[, IEC 60265-1][ and IEEE C37.60].
Production tests shall be performed by the manufacturer on each switchgear
assembly to ensure that design performance is maintained in production.
PART 3
EXECUTION
3.1
INSTALLATION
Electrical installations shall conform to IEEE C2, NFPA 70, and to the
requirements specified herein.
3.2
GROUNDING
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NOTE: Where rock or other soil conditions prevent
obtaining a specified ground value, other methods of
grounding should be specified. Where it is
impractical to obtain indicated ground resistance
values, the designer should make every effort,
within reason, to obtain ground resistance values as
near as possible to the indicated values.
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NFPA 70 and IEEE C2, except that grounds and grounding systems shall have a
resistance to solid earth ground not exceeding 5 ohms. When work, in
addition to that indicated or specified, is directed to obtain the
specified ground resistance, the provision of the contract covering
"Changes" shall apply.
3.2.1
Grounding Electrodes
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NOTE: For LANTNAVFACENGCOM projects, use Section
16303N, "Underground Electrical Work" in lieu of
Section 16302N, "Underground Transmission and
Distribution."
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Provide driven ground rods as specified in Section [16302N UNDERGROUND
TRANSMISSION AND DISTRIBUTION][_____][ at each corner of switchgear pad][
as indicated].
3.2.2
Switchgear Grounding
Connect #4/0 bare copper conductor ground loop, not less than 610 mm 24
inches below grade, to the upper end of the ground rods by exothermic welds
or compression connectors. Provide #4/0 bare copper conductors connecting
the switchgear grounding provisions to two different ground rods.
3.2.3
Connections
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SECTION 16341N
Page 12
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