NFPA 54: National Fuel Gas Code, Prior Years

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NFPA 54 Handbook

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2015 NFPA 54 Current Edition & Handbook


NFPA 54: National Fuel Gas Code provides the most effective means of ensuring fuel gas safety on consumers' premises.

NFPA 54: National Fuel Gas Code provides critical guidance for the safe installation and operation of fuel gas piping systems, appliances, equipment, and accessories. Installers, designers, AHJs, maintainers, inspectors, and facility managers look to the Code for design requirements; inspection, testing, and purging requirements; pipe sizing tables; and venting system rules that address fuel gas risks. Each edition builds on the next, through consensus-based changes that reflect the evolving needs of the field and the latest information about fuel gas safety.

  • The 2012 NFPA 54: National Fuel Gas Code incorporates indoor gas piping purging rules that address recommendations by the U.S. Chemical Safety Board (CSB). In response to a devastating gas piping purging accident, NFPA 54 received an emergency Tentative Interim Amendment to the purging requirements in the 2009 Code. With minor editorial changes, the 2012 NFPA 54 presents these new rules specifying mandatory use of combustible gas indicators and detectors so employers can identify the presence of fuel gas. Other major changes improve safety and facilitate Code application; such as a new bonding clamp location for Corrugated Stainless Steel Tubing (CSST) gas piping that clarifies bonding requirements added in the 2009 edition.
  • The 2009 NFPA 54: National Fuel Gas Code reflects scores of proposals from the field. A new bonding requirement for Corrugated Stainless Steel Tubing (CSST) gas piping installed inside buildings helps protect against threats likely to energize gas piping. This edition also addresses a new system of connecting copper tubing using a crimping tool for press-connect fittings, and includes a new rule for a dedicated master shutoff valve for laboratories. Revised requirements for connectors to radiant tube heaters help prevent cracks, leaks, or fractures. Additional requirements for commercial cooking appliance connectors reduce the risk of fugitive gas, potential fires, and subsequent losses.
  • The 2006 NFPA 54: National Fuel Gas Code includes revised data that helps designers and engineers properly size longer installations; dozens of pipe sizing tables have been extended with information for all piping up to 2,000 feet. A first-time requirement addresses support of rooftop piping to protect against wind damage. Revised requirements for appliance shutoff valves allow manifold systems with all shutoff valves in one location up to 50 feet from the most remote appliance. Definitions are organized by categories, and chapters dealing with piping, installation, and venting are grouped together for ease of use.

NFPA®'s Redline PDF contains both the current NFPA document and a Redline version of the document which shows changes from the previous edition marked in color. With the Redline you can quickly spot changed sections and tell specifically what has been changed from the previous edition, saving time and confusion.

  • Changed sections are marked with a vertical rule.
  • Deleted material is shown in red strikethrough type.
  • New material appears in blue underscored type.


Sample (NEC® 2014)

411.2411.3 Definition. Low-Voltage Lighting Systems.


(A) General. Lighting Ssystems Ooperating at 30 Volts- volts or  Less. A lighting system consisting less shall consist of an isolating power supply, the low-voltage luminaires, and associated equipment that are all identified for the use. The output circuits of the power supply are shall be rated for not more than 25 amperes and  operate at 30 volts (42.4 volts peak) or lessmaximum under all load conditions.


(B) Class 2. Listed Class 2 lighting equipment shall be rated in conformance with Chapter 9, Table 11(A) or Table 11(B).


411.3411.4 Listing Required. Lighting systems operating at 30 volts or less shall comply with 411.3(A)411.4(A) or 

411.3(B).411.4(B). Class 2 power sources and lighting equipment connected to Class 2 power sources shall be llisted.