Articles about National Electrical Code
How to Splice Electrical Wires and the Ground: For projects where you are extending the wiring of an existing circuit then the additional wire size must match that of the circuit you are branching from or splicing. Electrical junction box splices can be made safely when you understand the method.
GFCI Ground Fault Protection for Swimming Pool Lights: NEC Article 680-20, As described in this electrical question, anyone who enters the pool with this light on is in Danger of Potential Electrical Shock!
What is the NEC Code for Kitchen Counter Top Outlets? The Electrical Code Requirements for Kitchen Counter top Receptacle Circuits.
How should I Identify Electrical Conductor Wiring? NEC Article 200.7 (C) Re-Identifying Ungrounded Neutral Conductors.
Robert in New York asks; Where in the NEC code book does it show where and how BX can be exposed and what are the restrictions.
How to Wire a Junction Box: Selecting a Junction Box for Electrical Wiring, The Basics of Electrical Junction Boxes, The number of wires that are allowed in a Junction Box.
How to Identify Equipment Grounding Conductors as Required by the National Electrical Code
This site gives a lot more straight forward information than the code book does, it also seems to give recommendations that go above and beyond the NEC book.
Electrical Maintenance Training for Arc Flash: The NFPA 70E is the standard that addresses electrical safety requirements for employees. It includes arc flash training, study, clothing, etc. which would be very beneficial for your training program for your electrical maintenance department.
The Purpose of the Neutral Wire in Electrical Systems: What is the purpose of the neutral wire and the difference between the ground wire and the white neutral wire.
Ceiling Light Fixture Electrical Wiring and Connections: Depending on the age of the home there may be one or more cables found in the ceiling junction box. These cables are used for distributing power to the light fixture, the wall switch, and may provide power to wall receptacle outlets as well.
How high should a 220volt receptacle box be above the floor? Examples where 220volt receptacles are installed in specific applications and the NEC Code.
Safe Amperage Ratings for Electrical Wire: The amperage rating will depend on the insulation type of the #12 AWG wire, Surpassing the amperage rating of any electrical wire is highly dangerous and not safe and can cause the wire to become over heated which could lead to a fire.
How Many Electrical Wires Can Be Put Into Electrical Conduit – It is very important to understand the limitations when installing wire into conduit and Wire insulation is rated upon the amount of heat it can safely withstand.
How to Install Outdoor Electrical Wiring
How to Locate and Wire a Bathroom Light Switch