3.4.2
Wire Connections
3.4.2.1
Wire Splicing
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NOTE: In water tanks, split bolts are used (above
the water line only) because working space is
limited and the hydraulic or mechanical compression
tools may be cumbersome and hazardous to use; since
a single split-bolt will work loose when the wires
it connects are moved, a minimum of two split bolts
should be used. At ground level or in trenches,
compression tools can be used conveniently, and the
swaged sleeve connection produced by such tools is
more reliable than split bolts.
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Connecting wire splicing shall be made with copper compression connectors
or exothermic welds, following instructions of the manufacturer.
Split-bolt type connectors shall not be used.
3.4.2.2
Steel Surfaces
Connections to [ferrous pipe] [metal tanks] shall be made by exothermic
weld methods as manufactured by an approved manufacturer for the type of
[pipe] [tank]. Electric arc welded connections and other types of welded
connections to ferrous pipe and structures shall be approved before use.
3.4.3
Pipe Joints
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NOTE: This paragraph will be coordinated with and
referenced in mechanical and electrical
specifications.
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3.4.3.1
Electrical Continuity
Underground pipe shall be electrically continuous except at places where
electrically isolating joints are specified. Pipe joined by means other
than welding shall meet the following electrical continuity requirements:
a.
Mechanical joints that are not factory designed to provide
electrical continuity shall be bonded by installing a metallic
bond across the joint. The bonding connections shall be made by
the exothermic welding process.
b.
Mechanical joints designed to provide electrical continuity may be
used.
3.4.3.2
Coating
Mechanical joints and fittings of either the electrically conductive or
insulating type shall be coated with an underground type dielectric coating
system. Where external electrical continuity bonds are installed across
mechanical joints, bare or exposed metal, welds, bare wire and exposed
coupling parts shall be coated with a coating system.
a.
Couplings and fittings which have a low profile exterior designed
SECTION 13112A
Page 33
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