Electical Contractor

Based on a new requirement in Section 210.8(B)(5) of the 2008 National Electrical Code (NEC), all 125-volt, single-phase, 15- and 20-ampere receptacles installed within 6 feet or 1.8 meters of the outside edge of a sink in a commercial or industrial facility must be covered by ground-fault circuit i

With a new set of building codes taking effect, the building industry in California has new standards for going green, and the state once again preserves its spot as the nation’s energy trailblazer.

In the last issue of ELECTRICAL CONTRACTOR, I discussed the National Electrical Code (NEC) requirements for cord-and-plug-connected air conditioners (AC units). In this issue, I thought it would be appropriate to talk about the installation of permanently (hard-wired) installed units.

Article 110 Requirements for Electrical Installations; Article 230 Services; 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 330 Metal-Clad Cable: Type MC; Article

Article 210 Branch Circuits; Article 250 Grounding and Bonding; Article 300 Wiring Methods; Article 314 Outlet, Device, Pull, and Junction Boxes, Conduit Bodies; Fittings; and Handhole Enclosures; Article 330 Metal-Clad Cable: Type MC; Article 334 Nonmetallic Sheathed Cable: Types NM, NMC, and NMS;

The purpose of ground-fault protection on temporary wiring installations during construction, remodeling, maintenance, repair or demolition of buildings, structures or equipment is to ensure personnel protection.

In section 250.52(A)(2) of the 2005 and the 2008 editions of the National Electrical Code (NEC), the metal frame of a building or structure is considered to be a grounding electrode if the metal frame is connected to earth by one of four different methods.

As stated in the introduction, the purpose of the National Electrical Code (NEC) is the practical safeguarding of people and property from hazards arising from the use of electricity [90.1(A)].

I conduct a number of National Electrical Code (NEC)-related seminars each month. Lately, people have been asking about the requirements for grounding and bonding systems together to provide an equipotential plane.