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Articles about National Electrical Code

Installing a Sub Panel for a Detached Building


Do I need to run a ground wire for a 200 amp sub panel that is 200 feet away from the main panel? Grounding a Remote Sub Panel at a Detached Building.



How Many Receptacles and Lights does the Code Allow


How many receptacles and lights does the code allow per 15 amp circuit? Code Requirements for Wiring Outlets and Lights



Adding Electric Wiring to a Garage


Electrical Question: I need a 50amp, 30amp, and 20amp circuit in my garage. Do I need more than one conduit for the electrical wires?



How to Ground a Panel for a Detached Shop


Installing a Panel and Ground System for a Shop: Factors that Determine the Type of Bonded Grounding System, Detailed Questions and Answers about Installing a Shop Panel and Bonded Ground System.



Understanding Electrical Wiring for Ceiling Light Fixtures


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.



Install New Wiring in a Main Panel


New commercial 200amp 1 phase breaker panel. With line power entering from the bottom.



How Many Electrical Wires In a Junction Box


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.



What is The Purpose of the Neutral Wire


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.



How to Avoid Damaging Electrical Cables Inside Walls


Can wire locators accurately show where electrical wires are inside a wall? Methods of Home Electrical Circuit Wiring, Electric Wiring Inside Walls, How To Locate Electric Wires, Home Wiring Techniques.



How to Fix a Wiring Problem that Causes Electrical Trouble


Should a white neutral wire have voltage when the circuit breaker is off? A multiwire circuit has been improperly installed, which is causing electrical problems within the home.



Electrical Code and Swimming Pool Light Fixtures


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 Electric Code for Installing a 220volt Receptacle


How high should a 220volt receptacle box be above the floor? Examples where 220volt receptacles are installed in specific applications and the NEC Code.



NEC Electrical Code for Re-Identifying Ungrounded Conductor


How should I Identify Electrical Conductor Wiring? NEC Article 200.7 (C) Re-Identifying Ungrounded Neutral Conductors.



Kitchen Countertop Receptacles NEC 210-52


What is the NEC Code for Kitchen Counter Top Outlets? The Electrical Code Requirements for Kitchen Counter top Receptacle Circuits.



Electrical Code for Garage GFI Outlets and Receptacles


How to Plan and Install Electrical Wiring for Garage Outlets and Lighting Circuits: Electrical Codes about GFCI protection for 15A and 20A, 125V receptacles in garages.



Location of a Main Service Disconnect


Is a main electrical service panel required to have a main breaker or disconnect switch? What is the NEC code article number that states this?



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