Codes & Standards

 

Essential to the work of the electrical contractor is knowledge of the National Electrical Code, the National Electrical Installation Standards and additional standards and codes administered by the National Fire Protection Association, the Occupational Safety and Health Administration and others. Here is a list of all our articles on codes and standards listed chronologically by issue date. 

Jim Dollard has an extensive background in codes and standards. If you have a query about the National Electrical Code (NEC), Jim will help you solve it. Questions can be sent to codefaqs@gmail.com. Answers are based on the 2014 NEC.
 Stranded conductor terminations 


Selecting the correct size conductor is not difficult, but it involves more than selecting a conductor based solely on the ampacity shown in Table 310.15(B)(16) in the National Electrical Code (NEC).

The concept of modular data centers (MDCs) originated about six or seven years ago as a portable method of delivering information technology data center capacity without the high cost and long construction time.

Grounding electrode conductor connections are an important part of any electrical safety system. These connections ensure the path to ground through any of the grounding electrodes identified in Section 250.52(A).

More on Codes & Standards

 
The Assured Equipment Grounding Conductor Program
by Staff |

In keeping with the stated purpose of the National Electrical Code (NEC), the “practical safeguarding of persons and property…” protecting workers from electrical shock while using temporary power is of great concern for all electrical contractors.

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Safe Working Spaces around Electrical Equipment Allow Hasty Retreat
by Staff |

Over the past few months, we have discussed how good electrical design practice cannot and should not ignore the safety implications associated with the electrical installation.

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Is It Worth Removing the Exceptions?
by Staff |

Herewith, various 1999 National Electrical Code (NEC) issues that do not warrant a whole page of discussion. This is an example of why it is wrong to follow a “remove exceptions” edict without first examining the consequences. The 1996 NEC, Section 410-12 reads as follows:

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Branch Circuits, Grounding, Flexible Metal Conduit, Motors, and Transformers
by Staff |

CODE CITATIONS Article 210—Branch Circuits; Article 220—Branch-Circuit, Feeder, and Service Calculations; Article 250—Grounding; Article 350—Flexible Metal Conduit; Article 410—Lighting Fixtures, Lampholders, Lamps, and Receptacles; Article 430—Motors, Motor Circuits, and Controllers; and

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Installing Electrical Equipment in a Combustible Dust Location
by Staff |

Article 502 in the National Electrical Code (NEC) covers the installation of electrical equipment in a combustible dust location.

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Panelboard Mounting Heights, Fire Pump Electric Service, A/C Overcurrent Protection and More
by Staff |

CODE CITATIONS Article 110—Requirements for Electrical Installations; Article 230—Services; Article 240—Overcurrent Protection; Article 350—Flexible Metal Conduit; Article 410—Lighting Fixtures, Lampholders, Lamps, and Receptacles; Article 430—Motors, Motor Circuits, and Controllers;

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