National Appliance Energy Conservation Act of 1987 mandates minimum energy efficiency standards for most major residential appliances.
Name Plate Rating
The full-load continuous rating of a generator, prime mover, pump, compressor, or other equipment under specified conditions as designated by the manufacturer. It is usually indicated on a name plate attached mechanically to the individual machine or device.
A loosely defined petroleum fraction containing primarily aliphatic (linear) hydrocarbons with boiling points ranging from 125o to 240o C. It is thus intermediate between gasoline and kerosene, and contains components of both. Its principal uses are in solvents and paint thinners and as a raw material for the production of organic chemicals, but it has been used as a raw material for the production of synthetic natural gas.
Naphtha Stripper
A piece of equipment in which light hydrocarbon fractions are removed from naphtha for recovery or sale.
National Association of Regulatory Utility Commiss
A voluntary organization composed of federal and state regulatory commissioners who have jurisdiction over transportation agencies and public utilities.
National Energy Act of 1978 (NEA)
A comprehensive energy statute comprised of five separate but intertwined public laws dealing with energy conservation (The National Energy Conservation Policy Act, P.L. 95-619); coal conversion (The Powerplant and Industrial Fuel Use Act, P.L. 95-620); public utility rates (The Public Utility Regulatory Policy Act, P.L. 95-617); natural gas pricing (The Natural Gas Policy Act, P.L. 95-621); and a series of taxes (Energy Tax Act, P.L. 95-618) designed to discourage energy consumption and to accelerate the transition to alternative fuels. The five bills were signed into law on November 9, 1978. The main purpose of the NEA is to reduce oil imports and promote more efficient use of energy in this country.
National Fuel Gas Code
A code that provides general criteria for the installation and operation of gas piping and gas equipment on consumers' premises. The code is sponsored by both the National Fire Protection Association (NFPA-54) and the American National Standards Institute (ANSI Z223.1).
National Gas Transportation Association (NGTA)
Formerly the National Transportation & Exchange Association. A group that promotes understanding of the national pipeline grid and is working toward standardization in the industry.
National Historic Preservation Act (NHPA)
Federal legislation requiring archaeological and cultural review of areas identified for new pipeline construction and other utility right-of-way.
National Transportation Safety Board (NTSB)
An independent agency reporting administratively to the Secretary of Transportation, charged with the investigation of all safety-related incidents involving transportation. These include air, rail, highway, and liquid and gas pipeline transportation. The NTSB has no power to issue regulations; however, it issues reports and recommendations.
Native Base Gas
Native Gas
Natural Gas
Natural Gas Act of 1938
A federal law giving the Federal Energy Regulatory Commission (formerly the Federal Power Commission) jurisdiction over companies engaged in interstate sale or transportation of natural gas.
Natural Gas Condensate
Natural Gas Design Stress
The estimated maximum tensile stress in the wall of the pipe in the circumferential orientation due to internal natural gas pressure that can be applied continuously with a high degree of certainty that failure of the pipe will not occur.
Natural Gas Distillate
Material removed from natural gas at the "heavy end" portion; that is, aliphatic compounds ranging from C4 to C8.
Natural Gas Liquids
The hydrocarbon components: propane, butanes, and pentanes (also referred to as condensate), or a combination of them that are subject to recovery from raw gas liquids by processing in field separators, scrubbers, gas processing and reprocessing plants, or cycling plants. The propane and butane components are often referred to as liquefied petroleum gases or LPG.
Natural Gas Pipeline Safety Act of 1968 (Amended b
The federal law providing jurisdiction by the Federal Government over the transportation of gas which includes transmission and distribution and gathering operations in urban areas. The Secretary of Transportation, acting through the Materials Transportation Bureau, enforces the Act. Title 49 of the code of federal regulations, Part 192, contains the regulations issued under this Act. Department of Transportation (DOT) contracts with state regulatory agencies for some aspect of enforcement.
Natural Gas Reserves
Natural Gas Shrinkage
Natural Gas Supply Association (NGSA)
A trade group representing major integrated gas producers, medium-sized companies and independents.
Natural Gas Vehicle (NGV)
A vehicle that is equipped to operate using natural gas, either as the sole fuel (a dedicated NGV) or as an option (a dual-fuel NGV).
Natural Gasoline
Liquid removed from natural gas by absorption or refrigeration and containing hydrocarbons heavier than butane.
Needle, Fixed
A tapered projection, the position of which is fixed, coaxial with an orifice which can be moved with respect to it, to regulate the flow of gas.
Net Plant
In accounting, Utility Plant less Accumulated Provision for Depreciation (including Depletion) and Amortization.
Net Salvage
In accounting, the difference between gross salvage and cost of removal resulting from the removal, abandonment or other disposition of retired plant. Positive net salvage results when gross salvage value exceeds removal costs. Negative net salvage results when removal costs exceed gross salvage value. Positive net salvage decreases the cost to be recovered through depreciation expense and negative net salvage increases it.
Net-Back Pricing
A contractual arrangement in which the price of gas at the wellhead is based upon what it sells for at the burnertip less applicable transportation and distribution charges.
Netback Pricing Basis
The supplier receives a percentage of the price for which the product is sold.
A system of transmission or distribution lines so cross-connected and operated as to permit multiple supply to any principal point on it.
Neutron Log
A log of geological strata and the fluid contents therein, recorded by a nuclear device.
New Construction Program
A DSM program that affects the design and construction of new buildings and facilities.
New Field Discoveries
The volumes of proven reserves of crude oil, natural gas, or natural gas liquids discovered in new fields during the current or report year.
New Gas
Gas produced from wells drilled on production leases acquired on or after February 19, 1977.
Tubular pipe fitting, usually threaded at both ends.
Nitrogen (N2)
An odorless, colorless, generally inert gas. It comprises 79% of the earth's atmosphere in the free state.
Nitrogen Purge
To purge piping or other container with an inert agent such as nitrogen to remove combustible gases and minimize the possibility of fire or explosion.
No-Bump Rule (or Flowing Gas No-Bump Rule)
A tariff provision applicable to interruptible transportation which provides that a shipper may temporarily lose its ability to receive its full contract volumes if it ships at a lower volume. Under the no-bump rule, a shipper currently flowing gas cannot be bumped (lose capacity) because a shipper with a higher priority in the interruptible transportation queue decides to increase its receipt of gas within its transportation contract.
No-Notice Delivery Service
Delivery of natural gas on as-needed basis, without the need to precisely specify the delivery quantity in advance. No-notice delivery is generally made at the city gate or burner tip.
Nominal Pipe Size (NPS)
Designates a method of identifying the size of steel pipe without compromising the actual diameter data. Thus nominal 1 inch pipe with the actual external diameter of 1.315 inch (33.40 mm) becomes NPS 1; nominal 14 inch pipe with internal diameter of 13.250 inch (336.55 mm) becomes NPS 14.
Nominal Wall Thickness
Nominated Volume
The physical quantity of gas requested, typically in MMBtu/day, for a specific contract or for all contracts at a specific point.
A request for a physical quantity of gas under a specific purchase, sales or transportation agreement or for all contracts at a specific point. A nomination will continue for specified number of days or until superseded by another service request for the same contract.
Nomination Allocation
A precise listing of the quantities of gas to be transported during any specified time period. A nomination includes all custody transfer entities, locations, compressor fueled and other volumetric assessments, and the precise routing of gas through the pipeline network.
Non-Core Customers
End-users with enough gas volume to justify consideration of transportation-only service from the distributor. Compare CORE CUSTOMERS.
Non-Hydrocarbon Gases
Typical non-hydrocarbon gases which may be present in natural gas are carbon dioxide, nitrogen, hydrogen sulfide, and helium.
Non-Operating Interest
A share in the mineral interest which is without operating burdens. Close to royalty interest.
The working interest owner(s) other than the owner designated as the operator of the property.
Any customer who is eligible but does not participate in a utility DSM program in a given year.
Failure to deliver gas under a contract or agreement.
A substance or gas that will not burn.
Nondestructive Testing
A method of testing strength or mechanical integrity of a piece of equipment without damaging the item being tested. Examples are radiography, ultrasonic testing, acoustic emissions testing.
Nonfirm Gas
Gas which is not required to be delivered or not required to be taken under the terms of a gas purchase contract.
Generally used to denote activities or companies not subject to control and regulation by the Commission. (Much of the natural gas business not subject to control and regulation by the Commission and, therefore, referred to as nonjurisdictional is subject to regulation by State Regulatory agencies).
Nonmajor Natural Gas Company
Any gas company having gas sales or volume transactions exceeding 200,000 Mcf at standard conditions in the previous calendar year and is not classified as a MAJOR NATURAL GAS PIPELINE.
Nonutility Property
Title of Account 121, which includes the book cost of land, structures, equipment or other tangible property owned by the utility but not used in utility service and not property includible in Account 105 Utility Plant Held For Future Use.
Normal Recovery Capacity
Amount of water in U.S. gallons raised 100 degrees F per hour or per minute when calculated on a thermal efficiency of 70%, representing the water heated by a gas input of 1,190 Btu per gallon.
Normal Test Pressures
Those pressures specified for testing purposes at which adjustment of burner ratings and primary adjustments are made.
Normalization, Accounting
A method of allocation used for accounting for timing differences (such as differences between book and tax depreciation and income before taxes and taxable income). Under this method, income taxes for book purposes will be based on book income.
Normalization, Weather
The adjustments to historic or base period data to include the annual effect of changes in sales, revenues, and gas expenses (including Plant) to reflect differences from expected normal weather patterns or which are known and measurable with reasonable accuracy at the time of the filing and which will become effective by the end of the Test Period. See NORMALIZATION, ACCOUNTING.
Notice of Inquiry (NOI)
Procedure used by the Federal Energy Regulatory Commission to gather information on a specified industry issue. Normally calls for comments from all interested parties and in some cases, reply comments and/or public hearings.
Notice of Proposed Ruling (NOPR)
A proposal by the FERC to change its rules. Sometimes preceded by a Notice of Inquiry. Normally calls for comments from all interested parties and in some cases, reply comments and/or public hearings. A NOPR may or may not result in a final rule.
Nozzle, Flame Retaining
Any burner nozzle with built-in features to hold the flame close to the burner at high mixture pressure or high velocities.
Nylon Plastics
Plastics based on resins composed principally of a long-chain synthetic polymeric amide which has recurring amide groups as an integral part of the main polymer chain.

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