Design and Construction Handbook - Los Angeles World Airports

Guide Specification
J. Install from grounding bus of serving panel to ground bus of served panel, grounding
screw of receptacles, lighting fixture housing, light switch outlet boxes or metal
enclosures of service equipment. Ground conduits by means of grounding bushings on
terminations at panelboards with installed number 12 conductor to grounding bus.
K. Permanently attach equipment and grounding conductors prior to energizing equipment.
L. The Ufer ground grounding electrode shall consist of a 50-foot length of bare #4/0
copper wire extended its full length below ground level and embedded along the bottom
of the concrete foundation footing which is in direct contact with the foundation earth
and supported in such a manner that it cannot be less than 3 inches from the bottom or
side of the concrete when the foundation concrete is poured.
A loop at the approximate center of this grounding electrode shall be brought out at the
top of the foundation and a #4/0 copper ground conductor shall connect the ground
electrode to the main ground electrode bus in the equipment room. The conductor shall
be connected to the ground electrode by exothermic welding.
3.4 FIELD QUALITY CONTROL
A. Inspect and test in accordance with NETA ATS, except Section 4.
B. Grounding and Bonding: Perform inspections and tests listed in NETA ATS, Section
7.13.
C. Perform ground resistance testing in accordance with IEEE 142.
D. Perform leakage current tests in accordance with NFPA 99.
E. Perform continuity testing in accordance with IEEE 142.
F. When improper grounding is found on receptacles, check receptacles in entire project
and correct.
G. Perform retest.
END OF SECTION 26 05 27
GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS
26 05 27 - 5 Electrical Systems