3.1.2.1
Anode Lead Wires
Electrically connect anodes to the positive D.C. header cable with
compression connectors or split bolts, or the header cable may terminate in
a junction box for connection with all anodes cables. Use a minimum of two
split bolts for each connection if split bolts are used. Mark each of the
wires terminating in the junction box.
3.1.2.2
Anode Header Cable
Provide header cable on the [underside of the roof] [wall] with
electrically insulating hangers which shall enter the tank near the roof
line from an externally mounted junction box. External wiring shall be in
conduit. Mark each of the wires terminating in the junction box.
3.1.2.3
Splices
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NOTE: Splices are not allowed below water level.
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Locate under-roof electric wire splices above the high water line and seal
water-tight using a minimum of two 1/2-lap layers of butyl rubber tape
followed by two 1/2-lap layers of plastic tape.
3.1.3
Rectifiers
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NOTE: For impressed current systems only.
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3.1.3.1
Rectifier Installation
Location and mounting as indicated. Assemble and attach equipment
enclosures to [wall] [post] [pad] in accordance with the manufacturer's
instructions. Handle wires to prevent stretching or kinking the conductors
or damaging the insulation. Use lubricants when pulling wires into
conduits. Bond the equipment enclosures to a grounding electrode.
3.1.3.2
Wire-To-Tank Connections
Connect the structure wire to the tank [_____] [by use of an exothermic
weld kit] [by brazing]. Clean the structure surface by scraping, filing,
or wire brushing to produce a clean, bright surface. [Weld connections
using the exothermic weld kits in accordance with the manufacturer's
instructions. Test the integrity of the weld, prior to coating, by
striking with a 908 gram two pound hammer.] [Cover connections and
surrounding cleaned surface with an electrically insulating coating
compatible with the existing coating.]
3.1.4
Permanent Reference Electrodes
3.1.4.1
Permanaent Reference Electrode Calibration
Calibrate permanent reference electrodes against a portable electrode in
the presence of the Contracting Officer or his approved representative
before installation. Calibrate in a test tank containing water with the
same composition as the tank to be protected. Permanent electrode shall
measure a reference potential agreeing with that measured by the portable
SECTION 13112N
Page 18
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