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National Electrical Code ® Handbook Tenth Edition Mark W. Earley, P.E. Information Directory (White Book), category AALZ, ``Electrical Equipment for Use . NFPA NEC (), the National Electrical Code, as incorporated and mandated by the States and. Municipalities of Alaska, Connecticut, District of Columbia, et. Significant Changes to the National Electrical Code (NEC) . 2 Section Amendments to the National Electrical Code. The examination shall consist of memory and open book questions and must be.
Isolated ground receptacles may not be installed in the patient care vicinity of a health care facility. The concern is that the redundant grounding required by Sections Isolated ground receptacles may be used in other areas of a health care facility.
Receptacles at patient bed locations that are supplied by the critical branch circuit are required by The receptacles on the critical branch circuit must also indicate the panelboard and branch circuit number that supply the receptacles. The receptacles on the critical branch circuit must be identified and must also indicate the panelboard and circuit number that supply the receptacles.
This section also provides installation requirements regarding connection of the receptacles to a branch circuit as well as information on connection of the receptacle grounding terminal. An RV site with a 50A receptacle must also be equipped with a 30A receptacle This section has been revised to require a V, 30A receptacle to be provided at an RV site that is equipped with a 50A receptacle.
This new requirement is intended to address the use of adapter cords. In temporary installations, This section has been revised to permit the use of listed cord sets or devices that incorporate GFCI protection.
Several revisions were made in this Article in the NEC. Specific require ments for the cords and cables are in section Subsections A 1 , 2 and 3 have been rearranged in the NEC. A 1 requires at least one V, 15A or 20A receptacle on a general purpose branch circuit to be provided not less than 6 feet or more than 20 feet from the inside wall of a permanently installed pool.
This requirement previously only applied to dwelling units but now applies to all installations. A 2 has also been revised to delete the requirement that receptacles for circulation and sanitation must be a locking configuration. In addition to the requirements in Article Part I, storable pools, spas and hot tubs must meet the electrical installation requirements of Part III. Previously Part III only applied to storable pools. PV circuits are permitted in cable trays inside buildings.
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PSI Exam permanent testing approved tabs to adhere to your code book. 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 Code has user-friendly features to aid the reader in seeing changes. Revisions or additions to the articles from the version are highlighted in gray shading.
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.
In more recent terms, the upper cutoff for what is considered low is approximately 50 Volts, with most computer network equipment operating at 48 Volts DC or lower, and not requiring special training to connect or use. 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 electric code safety rules such as how to correctly penetrate building fire barriers and use firestop putty intumescents to prevent a low voltage cable from reducing building fire protection and increasing the risk of injury or death for building occupants.
Access to such safety information is typically restricted and limited access by the electrical industry itself so as to only permit licensed professionals to learn the NEC rules and educate themselves. Ten important items in Article have been summarized in a codebook.