The NEC has changed staying up-to-code is essential! Make sure you are informed with the most valuable tool for NEC users -- the NEC Handbook from. Authored by Mark W. Earley and Jeffrey S. Sargent. Combines solid, thorough, research-based content with the tools you need to build an in-depth. McGraw-Hill's National Electrical Code Handbook (McGraw-Hill's National Electrical Code Handbook) [Brian McPartland, Frederic Hartwell, Joseph.


Author: Hudson Metz
Country: Bahamas
Language: English
Genre: Education
Published: 19 October 2015
Pages: 888
PDF File Size: 27.40 Mb
ePub File Size: 5.56 Mb
ISBN: 493-2-35546-333-1
Downloads: 75737
Price: Free
Uploader: Hudson Metz

Download Now

Thoroughly revised and expanded with hundreds of pages of new material to reflect changes in the NEC, McGraw-Hill's National Electrical Code Handbook, 27th Edition provides authoritative guidance and analysis 2011 nec handbook help you accurately interpret NEC rules.

Co-author and working electrician, Frederic P. Hartwell, who has participated in the NEC process for almost thirty years, describes problems and difficulties in NEC provisions 2011 nec handbook an unbiased and practical perspective.

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 2011 nec handbook a particular case or location.


The Code has user-friendly features to aid the 2011 nec handbook in seeing changes. Revisions or additions 2011 nec handbook 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 2011 nec handbook to be installed in protective conduit. In more recent terms, the upper cutoff for what is considered low is approximately 50 2011 nec handbook, with most computer network equipment operating 2011 nec handbook 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.

National Electrical Code - Wikipedia

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. Aluminum 2011 nec handbook is listed by Underwriters Laboratories for interior wiring applications and became increasingly used around due to its lower cost.

  • McGraw-Hill's National Electrical Code Handbook, 27th Edition
  • NFPA 70®: National Electrical Code® (NEC®) Handbook, Edition
  • National Electrical Code
  • McGraw-Hill's National Electrical Code 2011 Handbook, 27th Edition

Prior tohowever, the aluminum wire used was manufactured to conform to the series 2011 nec handbook alloy, but this alloy was eventually deemed unsuitable for branch circuits due to galvanic corrosion where the copper and aluminum touched, resulting in poor contact and resistance to current flow, connector 2011 nec handbook problems, and potential fire risk.

Today, a new aluminum wire AA has been approved for branch circuits that does not cause corrosion where it contacts copper, but it is not readily available and is not manufactured below size 8 AWG.

Mike Holt Enterprises of Leesburg, Inc

Hence, copper wire is used almost exclusively in branch circuitry. A ground fault circuit interrupter GFCI is required for all receptacles in wet locations defined in the Code. The NEC also has rules about 2011 nec handbook many circuits and receptacles should be placed in a given residential dwelling, and how far apart they can be in a given type of room, based upon the typical cord length of small appliances.

Polarized, grounding, Volt 2011 nec handbook As of the NEC required that new Volt household receptacle outlets, for general purpose use, be both grounded and polarized.

Mike Holt NEC Specials

2011 nec handbook NEMA connectors implement these requirements. Changes in standards often create problems for new work in old buildings.

A GFCI detects an imbalance between the current in the "hot" side and the current in the "neutral" side.

One GFCI receptacle can serve as protection for several downstream conventional receptacles. GFCI devices come in many configurations including circuit-breakers, portable devices and receptacles.


Another safety device introduced with the code is the arc-fault circuit interrupter AFCI. This device detects arcs from hot to neutral that can develop 2011 nec handbook insulation between wires 2011 nec handbook frayed or damaged.

While arcs from hot to neutral would not trip a GFCI device since current is still balanced, circuitry in an AFCI device detects those arcs and will shut down a circuit.

AFCI devices generally replace the circuit breaker in the circuit. As of the National Electrical Code, AFCI protection is required in new construction on all and amp, volt circuits to bedrooms.


Provides full text of the code regulations alongside expert commentary from code specialists, offering code rationale, clarifications 2011 nec handbook new and updated rules, and practical, real-world advice on how to apply the code.

Other Posts: