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

 
Letter Codes, Feeder Conductor Size And More

If you have a problem related to the National Electrical Code (NEC), are experiencing difficulty in understanding a Code requirement, or are wondering why or if such a requirement exists, ask Charlie, and he will let the Code decide. Questions can be sent to codefaqs@earthlink.net.

READ MORE
 
Sizing Conductors, Part XXII

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

READ MORE
 
Tapping In: Understanding Feeder Taps, Transformer Secondary Rules

Over the years, there always seemed to be a lack of understanding of the requirements for feeder taps as well as transformer primary and secondary overcurrent protection.

READ MORE
 
What Constitutes Grouping?

A long-standing requirement in the National Electrical Code (NEC) is to provide a service disconnecting means for each building or structure served by electricity.

READ MORE
 
No Such Thing as A Silly Question?

A contractor installed a new fire alarm system in a college dormitory and asked the owner, “How thoroughly do you want me to test the fire alarm system?” I was there to witness the system’s pre-acceptance test before we called the authority having jurisdiction (AHJ) to arrange for the final acceptan

READ MORE
 
The New Cycle Of Fire Protection

The beginning of 2013 is a good time to review what is happening with codes and standards that affect fire protection.

READ MORE
 
Sizing Conductors, Part XXI

The rating of the overcurrent device must be considered when sizing a conductor.

READ MORE

Pages