National electric code 2011 download

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Advanced embedding details, examples, and help! Publication date Usage CC0 1. Org Contributor Public. Org Language English. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them.

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The National Energy Code of Canada for Buildings NECB provides minimum requirements for the design and construction of energy-efficient buildings and covers the building envelope, systems and equipment for heating, ventilating and air-conditioning, service water heating, lighting, and the provision of electrical power systems and motors. To choose the right edition of the Code for your jurisdiction, check with the municipal, provincial or territorial official.

Note that the eVantage eBook contains additional functionality and is not a free product. To purchase, visit the eVantage on-line store. It applies to new buildings and additions. For questions about Code content, licensing, sales, technical support, to obtain accessible copies, or to learn about other accommodations, please contact Codes Canada.

It is typically adopted by states and municipalities in an effort to standardize their enforcement of safe electrical practices. The 'authority having jurisdiction' inspects for compliance with these minimum standards. The NESC is used for electric power and communication utility systems including overhead lines, underground lines and power substations.

First published in , the NEC is updated and published every three years, with the edition being the most current. Most states adopt the most recent edition within a few of years of its publication. As with any 'uniform' code, jurisdictions may regularly omit or modify some sections, or add their own requirements sometimes based upon earlier versions of the NEC, or locally accepted practices.

However, no court has faulted anyone for using the latest version of the NEC, even when the local code was not updated. In the United States, anyone, including the city issuing building permits, may face a civil liabilitylawsuit for negligently creating a situation that results in loss of life or property. Those who fail to adhere to well known best practices for safety have been held negligent. This liability and the desire to protect residents has motivated cities to adopt and enforce building codes that specify standards and practices for electrical systems as well as other departments such as water and fuel-gas systems.

This creates a system whereby a city can best avoid lawsuits by adopting a single, standard set of building code laws. This has led to the NEC becoming the de facto standard set of electrical requirements. Department of Energy DOE facilities. The additional guidance is needed to clarify the current electrical code for these situations.

The NEC is available as a bound book containing approximately pages. It has been available in electronic form since the edition. Although the code is updated every three years, some jurisdictions do not immediately adopt the new edition. The NEC is also available as a restricted, digitized coding model that can be read online but not saved, copied and pasted, or printed, free of charge on certain computing platforms that support the restricted viewer software.

In the United States, statutory law cannot be copyrighted and is freely accessible and copyable by anyone. For that privilege, the coding model must still be purchased as either printed media or electronic format e.

Once the coding model has been accepted as law, it loses copyright protection and may be freely obtained at no cost. The introduction sets forth the purpose, scope, enforcement and rules or information that are general in nature. The first four chapters cover definitions and rules for installations voltages, connections, markings, etc. The next three chapters deal with special occupancies high risk to multiple persons , special equipment signs, machinery, etc.

Annexes A-J relate to referenced standards, calculations, examples, additional tables for proper implementation of various code articles for example, how many wires fit in a conduit and a model adoption ordinance. The introduction and the first 8 chapters contain numbered articles, parts, sections or lists or tables italicized exceptions, and Informational notes — explanations that are not part of the rules.

Articles are coded with numerals and letters, as. For example, Each code article is numbered based on the chapter it is in.

Those wiring methods acceptable by the NEC are found in chapter 3, thus all approved wiring method code articles are in the s. Efforts have been underway for some time to make the code easier to use.

Some of those efforts include using the same extension in those code articles for the support of wiring methods. The NFPA also publishes a 1,page NEC Handbook for each new NEC edition that contains the entire code, plus additional illustrations and explanations, and helpful cross-references within the code and to earlier versions of the code. The explanations are only for reference and are not enforceable. Many NEC requirements refer to 'listed' or 'labeled' devices and appliances, and this means that the item has been designed, manufactured, tested or inspected, and marked in accordance with requirements of the listing agency.

Upon payment of an investigation fee to determine suitability, an investigation is started. To be labeled as fit for a particular purpose for example 'wet locations', 'domestic range' a device must be tested for that specific use by the listing agency and then the appropriate label applied to the device. A fee is paid to the listing agency for each item so labeled, that is, for each label. Most NRTLs will also require that the manufacturer's facilities and processes be inspected as evidence that a product will be manufactured reliably and with the same qualities as the sample or samples submitted for evaluation.

An NRTL may also conduct periodic sample testing of off-the-shelf products to confirm that safety design criteria are being upheld during production. Because of the reputation of these listing agencies, the 'authority having jurisdiction' or 'AHJ' — as they are commonly known usually will quickly accept any device, appliance, or piece of equipment having such a label, provided that an end user or installer uses the product in accordance with manufacturer's instructions and the limitations of the listing standard.

However, an AHJ, under the National Electrical Code provisions, has the authority to deny approval for even listed and labeled products. Likewise, an AHJ may make a written approval of an installation or product that does not meet either NEC or listing requirements, although this is normally done only after an appropriate review of the specific conditions of a particular case or location.

The electric code makes a distinction between 'high' voltages above volts, and 'low' voltages below that. For circuits defined as low voltage, in some jurisdictions, there is no requirement for licensing, training, or certification of installers, and no inspection of completed work is required, for either residential or commercial work.

Low voltage cabling run in the walls and ceilings of commercial buildings is also typically excluded from the requirements to be installed in protective conduit. The precise reasoning for the selection of volts as the division between high and low is not clearly defined, but appears to be based on the idea that a person could touch the wires carrying low voltage with dry bare hands, and not be electrocuted, injured, or killed.

This is generally true for 12 volt systems, but becomes more ambiguous as the voltage increases to volt. The meaning also varies when alternating current is used, as there is the more commonly known root mean square voltage V but also a peak wave voltage V.

Telephones for example use low voltage cabling, but the ringing voltage from the central office is approximately 90 volts peak AC and has an RMS voltage of 63 V.

Although low voltage cabling does not require inspection or training to install in some jurisdictions, it is still important for installers to be aware of specific safety rules such as how to correctly penetrate building fire barriers.

Article addresses 'branch circuits' as opposed to service or feeder circuits and receptacles and fixtures on branch circuits.