Shunt Types And Values - Nace CP 1 Course Manual

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