From American Electricians' Handbook, Fourteenth Edition


1. The NEC rules, which are the recommendations of the National Fire Protection Association (NFPA), should be followed in installing all interior wiring. These rules are revised every 3 years, and so it is inadvisable to include them in entirety in this book. A copy of the rules can be obtained form any local inspection bureau or purchased from the NFPA. All statements are made in accordance with the 1996 edition of the Code. The Occupational Safety and Heath Act (OSHA) adopted the 1971 National Electrical Code (initially the 1968 edition) as the electrical standard for employee safety in the workplace. NFPA has written a standard title "Electrical Safety Requirements for Employee Workplaces" that is intended to serve as an enforcement document by compliance officials of the Department of Labor.

2. There are local regulations covering the installation of wiring. in force in many localities, which have been enacted by city and state governments. Sometimes these differ from the Code regulations, and so it is always well to be familiar with all the regulations in force before starting any work. The city and state rules are in reality laws and therefore take precedence over the NEC rules, which of themselves have no legal status.

3. Definitions (National Electrical Code). Definitions that duplicate those in ANSI/IEEE-100 Standard Definitions of Electrical and Electronic Terms, C42, are marked with an asterisk (*). Those not so marked either differ from or are not found in the latest...

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Electrical Contracting Services
Electrical contracting services install and maintain electrical distribution equipment; interior, exterior and municipal lighting; security systems and closed circuit television systems (CCTV); and information technology or IT systems.
Standards and Technical Documents
Standards and technical documents includes standards, codes, regulation, handbooks, manuals, comprehensive guides and other formal publications. Standards, codes, and regulation establish uniform specifications, procedures or technical criteria.
Wiring Ducts
Wiring ducts are rigid trays typically used as raceways for cables and wires within electrical enclosures.
Electrical Maintenance Services
Electrical maintenance services perform electrical system testing, efficiency analysis, reliability determination, safety checks, and scheduled shutdowns of electrical assets such as motors, transformers, power supplies, and co-generation systems. The upgrades and repairs that they perform help to prevent costly downtime.
Grounding Indicators
Grounding indicators are used to monitor and verify the presence of grounding systems.

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