Nace CP 1 - Shunt Types and Values

Field Measurements 5:14
CP 1 – Cathodic Protection Tester Course Manual
© NACE International, 2000
02/01/05
Table 5.2 Shunt Types and Values
Shunt Rating Shunt
Value
Shunt
Factor
Amps mV Ohms A/mV
Holloway Type
RS 5 50 .01 .1
SS 25 25 .001 1
SO 50 50 .001 1
SW or CP 1 50 .05 .02
SW or CP 2 50 .025 .04
SW or CP 3 50 .017 .06
SW or CP 4 50 .0125 .08
SW or CP 5 50 .01 .1
SW or CP 10 50 .005 .2
SW 15 50 .0033 .3
SW 20 50 .0025 .4
SW 25 50 .002 .5
SW 30 50 .0017 .6
SW 50 50 .001 1
SW 60 50 .0008 1.2
SW 75 50 0.00067 1.5
SW 100 50 .0005 2
J.B. Type
Agra-Mesa 5 50 .01 .1
Cott or MCM
Red (MCM) 2 200 .1 .01
Red (Cott) .5 50 .1 .01
Yellow
(MCM)
8 80 .01 .1
Orange
(MCM)
25 25 .001 1