A new definition covering supplementary overcurrent-protective devices has been added to Article 100 in the 2005 National Electrical Code (NEC) to indicate that limited protection may be provided for specific applications or utilization equipment.
With the acceptance of the 2005 National Electrical Code (NEC), installing and servicing fluorescent luminaires (fixtures) has become a complex situation. The design and layout of the lighting system is critical in determining certain required added features.
Flexible cord terminations Q: May a properly sized flexible cord with 15-ampere male attachment plugs on both ends be used to supply an optional standby generator for a small business? The cord is intended to plug into a receptacle on the generator and a receptacle on the outside of the building.
The text in Section 230.40 covering the number of sets of service-entrance conductors for each service drop or lateral has not changed since it was accepted into the 1984 National Electrical Code (NEC).
According to the Design-Build Institute of America (DBIA) “Design-Build is a process that has been embraced by the world's great civilizations. In ancient Mesopotamia, the Code of Hammurabi (1,800 BC) fixed absolute accountability upon master builders for both design and construction.
Twenty-five years ago, the National Fire Protection Association (NFPA) first prepared a set of standards to ensure electrical workers were safe on their jobs. So why has this standard-known as the NFPA 70e-suddenly become such a big deal?
In the 2002 and previous editions of the National Electrical Code, the metal frame of a building or structure was required to be used as a grounding electrode when the metal of the building or structure was effectively grounded.
Ground-fault circuit interrupter (GFCI) protection for personnel or a similar protection technique has been in the National Electrical Code (NEC) since 1962 with specific reference to GFCI and its definition found in the 1968 NEC.
The electrical contractor's job on a typical construction project goes beyond the scope of traditional electrical installations. It's a two-part responsibility that includes the construction or renovation of electrical systems for the structure.
Simple questions to tackle audits or troubleshooting jobs Last month's article focused on having the right tool for the job. When conducting a power-quality audit or carrying out a troubleshooting job, the right tool is just one part of the process.
Article 210 Branch Circuits Article 240 Overcurrent Protection Article 250 Grounding Article 310 Conductors for General Wiring Article 430 Motors, Motor Circuits and Controllers Branch-circuit size for motor load Q: I have to install a 11/2 horsepower, single-phase, 120V motor with a nameplate full
Dedicated 20-ampere branch circuits are required Most dwelling units are required to have a laundry area within the living area or have a laundry area provided on the premises for a multifamily building.
The basis of grounding and bonding starts at the connection of a bonding jumper or an equipment-grounding conductor to a box, an enclosure or other electrical equipment and ends at the point of connection to the service-grounded conductor in a grounded system or at the service-equipment enclosure fo