South Dakota Administrative Rules
Title 20 - PUBLIC SAFETY
Article 20:10 - PUBLIC UTILITIES COMMISSION
Chapter 20:10:39 - Stray electrical current and voltage remediation rules
Section 20:10:39:01 - Definitions

(1) "Ampere," a unit of measure of electrical current;

(2) "Cow contact current" or "Ice," the alternating current, 60 Hertz, root mean square, steady-state current measured through the shunt resistor;

(3) "Cow contact voltage" or "Vcc," the alternating current, 60 Hertz, root mean square, steady-state voltage measured across the shunt resistor;

(4) "Current," an electrical parameter that is the flow or amount of electricity past any single point in a conductor or conductive element per unit of time;

(5) "Ground," a term used in electrical science meaning the point of lowest potential for an electrical system;

(6) "Ishunt," the measurement of current across the shunt resistor;

(7) "Milliampere" or "mA," one one-thousandth of an ampere;

(8) "Ohm," the standard unit of electrical resistance;

(9) "Open circuit voltage" or "Voc," the difference of electrical potential between two terminals when disconnected from any circuit;

(10) "Primary neutral to reference voltage" or "Vp," the voltage that exists between the primary grounding conductor point of an electrical system's utility transformer and a remote reference electrode;

(11) "Primary system/' a term that describes the high voltage utility electrical system, including the generation, transmission, and distribution systems. It also refers to the high voltage side of a distribution transformer;

(12) "Remote reference electrode," a temporary point of measurement established by correctly installing a ground rod;

(13) "Resistance," an electrical quantity that quantifies a physical material's ability to conduct or not conduct electricity;

(14) "Root mean square," a mathematical conversion used to equate alternating and direct currents and voltages on similar terms;

(15) "Secondary neutral to reference voltage" or "Vs," the voltage that exists between the secondary grounding electrode/grounding conductor point of an electrical system's service entrance panel and a remote reference electrode;

(16) "Secondary system," the part of the electrical system on the customer's side of both the meter and transformer;

(17) "Service provider," any person, company, or other legal entity providing stray current or voltage testing, consulting, measurements, analysis services, construction, or hardware;

(18) "Shunt resistor" or "Rshunt," a physical resistor or combination of resistors used to simulate a dairy cow during the measurement of cow contact voltage or current. A shunt resistor must be 500 Ohms, plus or minus two percent;

(19) "Source resistance" or "Rsource," the portion of resistance in the circuit, other than the resistance of the shunt resistor;

(20) "Transient deviation," a non-steady-state increase or spike in voltage or current. For the purpose of identifying and reporting transient deviations in cow contact voltage or cow contact current, a transient deviation occurs when the recorded maximum Vcc or Ice in a recording interval exceeds 200 percent of the steady-state Vcc or Ice recorded during the same recording interval;

(21) "Voltage," the electrical quantity that describes the push or potential that electrical energy needs to flow in a circuit;

(22) "Voltage drop/' the difference in voltages when a current passes through a resistance or impedance in a closed loop circuit and a voltage drop is produced across that resistance or impedance; and

(23) "Vshunt," the measurement of voltage across the shunt resistor.