Electical Contractor

A recent addition to the 2008 National Electrical Code (NEC) has prompted a possible change for the 2011 NEC and a number of questions from electricians, electrical contractors, electrical inspectors and electrical engineers.

If you have a Code-related problem or are experiencing difficulty in understanding a National Electrical Code (NEC) requirement and are wondering why or if such a requirement exists, ask Charlie. And we will let the Code decide.

Article 220 of the National Electrical Code (NEC) provides requirements for calculating branch-circuit, service and feeder loads. Definitions for the three types of loads that Article 220 covers are in Article 100.

Thanks for your great responses to our new Code FAQs column! This month, as promised, this column addresses inquiries relating to motors, motor circuits and motor controllers.

The National Electrical Code (NEC) contains an introduction, nine chapters and eight annexes; Article 90 is the introduction to the NEC, and it includes specifications that are essential to the rest of the Code book. The scope is one item covered in the introduction (in 90.2).

In November, I covered the layout of National Fire Protection Association (NFPA) 70, the National Electrical Code. Here, I discuss the layout and use of NFPA 70E and its relationship to NFPA 70. NFPA 70E

What is the relationship between NFPA 70 (the National Electrical Code), NFPA 70B (Maintenance for Electrical Equipment), and NFPA 70E (Safety Related Work Practices)? An Electrical Contractor reader asked if I would explain how NFPA 70, 70B and 70E were related in codes and standards application.

Article 210 Branch Circuits; Article 215 Feeders; Article 240 Overcurrent Protection; Article 250 Grounding and Bonding; Article 310 Conductors for General Wiring; Article 314 Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and Handhole Enclosures; Article 406 Receptacles, Cord C

The 20th and 21st centuries have seen many changes in gasoline stations.