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

 
Installation Parameters

Recently, a question came up regarding installing overcurrent protection for dry-type transformers rated less than 1,000 volts (V). The transformer installation is a 150-kilovolt-ampere, three-phase unit with a 480V primary and a 208Y/120V secondary.

READ MORE
 
Growth Spurt

For many years, Article 250, which covers grounding and bonding in the National Electrical Code (NEC), only contained two tables. Table 250.122 was used for sizing the equipment grounding conductors, based on the size of the overcurrent protective device in the circuit.

READ MORE
 
Managing Energy Management

Energy management is becoming commonplace in today’s electrical infrastructures through the control of utilization equipment, energy storage and power production. Yet, limited consideration is found in electrical installation standards to actively manage these systems.

READ MORE
 
Type SE Cable Support, Gas Pipe Bonding And More

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.
 Type SE cable support


READ MORE
 
Sizing Conductors, Part XXXIV

Article 240, in the National Electrical Code (NEC), provides general requirements for overcurrent protection and overcurrent protective devices.

READ MORE
 
Listed Luminaires, Outside Feeder Taps And More

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.
 Listed luminaire?


READ MORE
 
Sizing Conductors, Part XXXIII

The first seven parts of Article 240 in the National Electrical Code (NEC) provide the general requirements for overcurrent protection and overcurrent protective devices not more than 1,000 volts (V), nominal.

READ MORE

Pages