Tenn. Comp. R. & Regs. 1220-04-05-.03
(1) The following words and terms, when used in these rules, shall have the meaning indicated below:
(a) Authority - Means the Tennessee Regulatory Authority of Tennessee.
(b) Utility - Means any gas company operating under the jurisdiction of the Authority.
(c) Customer - Means any person, firm, association, or corporation, or any agency of the Federal State, or local government, being supplied with gas service by a gas utility.
(d) Premises - Means a piece of land or real estate, including buildings and other appurtenances thereon.
(e) Gas Plant - Means all facilities owned by a gas utility for the production, storage, transmission, and distribution of gas.
(f) Main - Means a gas pipe, owned, operated, or maintained by a utility which is used for the purpose of transmission or distribution of gas, but does not include "service pipe."
(g) Service Pipe - The pipe that runs between a main or a pipeline and a customer's meter.
(h) Meter - Without other qualifications, shall mean any device or instrument which is used by a utility in measuring a quantity of gas.
(i) Check Flow - Means a flow between twenty percent (20%) and fifty percent (50%) of the rated capacity of a meter according to the manufacturer's specifications.
(j) Full Rated Flow - Means a flow of one hundred percent (100%) of the rated capacity of a meter according to the manufacturer's specifications.
(k) Cubic Foot - Cubic foot of gas as used in these rules shall have the following meanings.
1. Where gas is supplied and metered to customers at the pressure (as defined in Rule 1220-4-5-.32) normally used for domestic customer's appliances, a cubic foot of gas shall be that quantity of gas which, at the temperature and pressure existing in the meter, occupies one (1) cubic foot.
2. When gas is supplied to customers at other than the pressure in (1.) above, the utility shall specify in its rules the base for measurement of a cubic foot of gas (see Rule 1220-4-6-.06(a)(2)(vi)). Unless otherwise stated, such cubic foot of gas shall be that quantity of gas, which at a temperature of sixty-eight degrees Fahrenheit (68°F) and a pressure of fourteen and seventy-three one hundredths (14.73) pounds per square inch absolute, occupies one (1) cubic foot.
3. The standard cubic foot of gas for testing the gas itself for bearing value shall be that quantity of gas, saturated with water vapor, which at a temperature of sixty degrees Fahrenheit (60°F) and a pressure of thirty (30) inches of mercury occupies one (1) cubic foot. (Temperature of mercury two degrees Fahrenheit (2°F) acceleration due to gravity - thirty-two and seventeen one-hundredths (32.17) ft. per second; density - thirteen and five hundred ninety-five one-thousandths (13.595) grams per cubic centimeter).
(l) Interruption of Service - Means any unplanned disturbance of the gas supply whereby the pilot flame on the appliances of at least fifty (50) customers shall have been extinguished.
(m) The abbreviations used, and their meaning, shall be as follows:
BTU - British Thermal Unit
LP-Gas - Liquefied Petroleum Gas
psig - Pounds Per Square Inch, Gauge
W.C. - Water Column
Tenn. Comp. R. & Regs. 1220-04-05-.03
Authority: T.C.A. § 65-2-102.