Another Step Forward

The electronic age has opened the way to an exciting world involving advanced methods of communications. What was once thought to be science fiction...

Selection of Arc-Fault Circuit Interrupters

The 2002 National Electrical Code (NEC) requires that the branch circuits supplying outlets of dwelling unit bedrooms, as well as mobile homes and manufactured...

The 2002 NESC Strength and Loading $$

The most significant change to the 2002 National Electrical Safety Code (NESC) is in the strength and loading requirements for aerial electric distribution and...

Temporary Installations

The first thing one notices about Article 305, Temporary Wiring, in the 2002 National Electrical Code is that it is no longer there! By...

Can Power Strips be Daisy Chained or Plugged Directly into a...

Question: GTO cable in raceway Does UL List a GTO cable that does not need to be installed in a raceway? Answer GTO cable is Listed by...

Overcurrent Protection and the NEC

The fundamental purpose of overcurrent protection is to protect conductors and equipment against the effects of excessive temperature on conductors and conductor insulation from...

Circuit Overcurrent Protection

Overcurrent devices protect the circuit conductors and conductor insulation from overheating. They also limit the damage associated with overheating and faults in downstream equipment....

Grounding Separately Derived Systems

Grounding separately derived systems is required where the system meets the characteristics of 250.20. This section gives the conditions under which electrical systems are...