2.5
REFERENCE ELECTRODES
[Zinc] [copper-copper sulfate] type provided with micro-pore diffusion
window for water contact and water-tight plug for renewal of copper sulfate
crystals and solution. Provide cells with No. [10] [12] [_____] AWG,
stranded copper conductor with 2.8 mm 110 mils [_____] thick ASTM D 1248,
high molecular weight polyethylene (HMWPE) insulation cable of sufficient
length to extend to the [test station] [junction box] without splicing.
Reference electrodes shall have a minimum 15 year life, stability of plus
or minus 5 millivolts under 3 microamp load, and an initial accuracy of
plus or minus 10 millivolts referenced to a calibrated portable reference
electrode.
2.6
SHUNT RESISTORS
[0.01] [_____] ohm, [6] [_____] amp, with an accuracy of plus or minus one
percent. [Shunts shall conform to MIL-I-1361 [rating as shown]].
2.7
CONDUIT
[UL 6, rigid galvanized steel.] [Outlet boxes: UL 514A
and Fitting: UL
514B, threaded hubs.] [Metallic conduit and fittings to
be
polyvinyl-chloride coated in accordance with [NEMA RN 1,
Type A40] [NEMA TC
2, Type EPC-40-PVC]]. Nonmetallic conduit shall conform
to NEMA TC 2.
Provide conduit support in accordance with NFPA 70.
2.8
CABLE OTHER THAN ANODE LEAD WIRES
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NOTE: Any pinhole, cut, scratch or other damage to
the anode cable exposing bare copper to the
electrolyte will result in early failure of the
impressed current cathodic protection system. For
this reason, special, extra heavy insulation is used
on anode cable.
**************************************************************************
Copper wire conforming to ASTM B 3 and ASTM B 8. Wires terminating in a
rectifier, junction box or test station shall have a cable identification
tag. Refer to paragraph 2.1.4 [_____] for anode lead wires.
2.8.1
AC Power Supply Wiring
[UL 83, Type [THW] [THWN] [TW]] [UL 44, Type RHW,] [UL 854, Type USE],
stranded [solid] copper conductors, gage (AWG) and color coded as indicated.
2.8.2
Anode Wire
Type CP [ASTM D 1248, High Molecular Weight Polyethylene (HMWPE)] [cross
linked polyethylene (XLPE)] insulation, stranded copper conductors, gage
(AWG) as indicated.
2.8.3
Rectifier DC Positive (Anode) Header Cable
Type CP [ASTM D 1248, High Molecular Weight Polyethylene (HMWPE)] [cross
linked polyethylene (XLPE)] insulation, stranded copper conductors, gage
(AWG) as indicated. Refer to paragraph 2.1.4 [_____] for anode lead wires.
SECTION 13112N
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