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. 

Are multiwire branch circuits becoming antiquated for most new installations, or are they still being used in most circuit applications?

The National Electrical Code (NEC) is divided into an introduction and nine chapters with 10 informational annexes. As specified in 90.5(D), the informative annexes are not part of the NEC’s enforceable requirements but are included for informational purposes only.

Advances in medical technology have resulted in more medical appliances and equipment being used in general-care and critical-care patient bed locations. The governing body of the healthcare facility typically determines the level of care in a given area.

Point of supply


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.
 Point of supply


Electrical Contractor

More on Codes & Standards

 
Illuminated Fountains, Voltage Drop and More

Article 210—Branch Circuits; Article 240—Overcurrent Protection; Article 334—Nonmetallic-Sheathed Cable: Types NM, NMC and NNS; Article 422—Appliances; Article 440—Air Conditioning and Refrigerating Equipment; Article 647—Sensitive Electronic Equipment; Article 680—Swimming Pools, Fountains and Simi

READ MORE
 
Change of Plans

The price of copper has been increasing at an incredible rate over the past few years; the reasons for the increase is not an issue that will be discussed here, but the resulting price escalation affects the electrical industry since many of the electrical conductors used in construction are copper

READ MORE
 
Branch-Circuit, Feeder and Service Calculations, Part X
by Staff |

Maximum Loads: Last month’s Code in Focus concluded by covering loads for additions to existing installations; this month, the discussion continues with maximum loads as specified in 220.18.

READ MORE
 
Twist-Lock Receptacles, Conductors and More
by Staff |

Included articles: Article 210—Branch Circuits; Article 230—Services; Article 250—Grounding and Bonding; Article 300—Wiring Methods; Article 310—Conductors for General Wiring; Article 314—Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and Handhole Enclosures; Article 320—Armored

READ MORE
 
Danger: High Voltage
by Staff |

Applying caution to electrical inspection: I could not do my job as an inspector if I couldn’t open doors and covers of energized equipment; when I came aboard, they gave me a screwdriver and a flashlight and turned me loose.

READ MORE
 
Getting Started in Security
by Staff |

Bill yourself as code-compliant and follow the rules: Electronic security systems forecasts show continued industry growth; In fact, some studies indicate this $16 billion market will grow at an annual rate approaching 7 percent.

READ MORE
 
Branch-Circuit, Feeder and Service Calculations, Part IX

Article 220—Load Calculations 220.14 Other Loads—All Occupancies Understanding how to perform load calculations is an important part of an electrician’s professional career.

READ MORE

Pages