the standard product of a recognized manufacturer. Test stations shall be
complete with an insulated terminal block having the required number of
terminals. The test station shall be provided with a lockable over and
shall have an embossed legend, "C.P. Test." A minimum of one (1) test
station shall be provided each component of the [pipe] [tank] [_____]. A
minimum of six (6) terminals shall be provided in each test station. A
minimum of two (2) leads are required to the metallic pipe from each test
station. Other conductors shall be provided for each anode, other foreign
pipe, and reference cells as required. [Test stations may be constructed
of nonmetallic materials. However, if nonmetallic materials are utilized,
as a minimum, the materials shall be resistant to damage from ultraviolet
radiation, contain good color retention qualities, contain high strength
qualities, and be resistant to accidental or vandalistic impacts that might
be normally encountered in the environment for which they are to be
installed. The test stations shall be listed for the particular
application for which they are to be utilized].
2.2.8
Joint and Continuity Bonds
Bonds shall be provided across all joints in the metallic [water] [gas]
[_____] lines, across any electrically discontinuous connections and all
other pipes and structures with other than welded or threaded joints that
are included in this cathodic protection system. Unless otherwise
specified in the specifications, bonds between structures and across joints
in pipe with other than welded or threaded joints shall be No. 8 AWG
stranded copper cable with polyethylene insulation. Bonds between
structures shall contain sufficient slack for any anticipated movement
between structures. Bonds across pipe joints shall contain a minimum of
102 mm 4 inches of slack to allow for pipe movement and soil stress. Bonds
shall be attached by exothermic welding. Exothermic weld areas shall be
insulated with coating compound and approved, and witnessed by the
Contracting Officer. Continuity bonds shall be installed as necessary to
reduce stray current interference. Additional joint bondings shall be
accomplished by the Contractor where the necessity is discovered during
construction or testing or where the Contracting Officer's representative
directs that such bonding be done. Joint bonding shall include all
associated excavation and backfilling. There shall be a minimum of two (2)
continuity bonds between each structure and other than welded or threaded
joints. The Contractor shall test for electrical continuity across all
joints with other than welded or threaded joints and across all metallic
portions or components. The Contractor shall provide bonding as required
and as specified above until electrical continuity is achieved. Bonding
test data shall be submitted for approval.
2.2.9
Resistance Bonds
Resistance bonds should be adjusted as outlined in this specification.
Alternate methods may be used if they are approved by the Contracting
Officer.
2.2.10
Stray Current Measurements
Stray current measurements should be performed at each test station. Stray
currents resulting from lightning or overhead alternating current (AC)
power transmission systems shall be mitigated in accordance with NACE RP0177.
2.2.11
Electrical Isolation of Structures
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SECTION 13110A
Page 18
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