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 Answers are based on the 2014 NEC.
 Tape over device terminal screws?

Storage batteries are used for many different types of electrical equipment throughout the National Electrical Code (NEC). The phrase “storage batteries” occurs in 13 locations in the NEC index. In addition, Article 480 is devoted to the installation requirements for storage batteries.

All of the first eight chapters in the National Electrical Code (NEC) contain at least five articles except one. Chapter 1, General, contains only two articles. The first, Article 100, contains definitions essential to the proper application of the NEC.

When incorporating larger feeders or branch circuits into equipment, many commercial and industrial electrical designs require use of parallel arrangements.

More on Codes & Standards

Structured Wiring Systems - A New Concept or a Reincarnation?

Recently, a new term has evolved to describe an integration of all low-voltage systems, such as TV, radio, telephone, and Internet/computer interlinks from one main distribution hub to serve all rooms within a building with multifunction communications capability.

Article 210 - Branch Circuits

210-4 Multiwire Branch Circuits

Grounding in Patient Care Areas, Overcurrent Protection for Motors, and More

CODE CITATIONS Article 110—Requirements for Electrical Installations Article 210—Branch Circuits Article 250—Grounding Article 430—Motors, Motor Circuits, and Controllers Article 517—Health Care Facilities

Installing Cable TV in a Nursing Home Facility

As the Baby Boomers of our society reach their golden years, the need for more and more nursing home facilities will become imperative. Electrical contractors will be faced with the responsibility of properly installing many different sophisticated systems within these nursing homes.

Adequate Short-circuit, Ground-fault, and Overload Protection

Continuing with our review of taps from branch circuits, Sec. 210-19 and from feeders, Sec. 240-21(b) and (c), we turn now to 240-21(d), which is a reference to Sec. 230-91, Service Conductors.

Overcurrent Protection, Grounding, Air Conditioning and Refrigerator Equipment, and More

CODE CITATIONS Article 240—Overcurrent Protection Article 250—Grounding Article 430—Motors, Motor Circuits, and Controllers Article 440—Air-Conditioning and Refrigeration Equipment Article 680—Swimming Pools, Fountains, and Similar Installations Overcurrent protection