Code Quandaries, May 2010
May 1, 2010, By Mike Holt, NEC Consultant
Your most pressing National Electrical Code (NEC) questions answered. All questions and answers are based on the 2008 NEC...
Wiring Methods - Part 3 of 3
May 1, 2010, By Mike Holt, NEC Consultant
Understanding the wiring method requirements of Article 314, including guidelines for conductor box fill...
The Basics of Industrial Control Panels
May 1, 2010, By Mark Lamendola, Electrical Consultant
A closer look at NEC Art. 409, which provides the minimum safety requirements for industrial control panels...
Wiring Methods — Part 2 of 3
Apr 1, 2010, By Mike Holt, NEC Consultant
Article 300 provides wiring method requirements including information on sizing and securing raceways...
Code Quandaries
Apr 1, 2010, By Mike Holt, NEC Consultant
Your most pressing National Electrical Code (NEC) questions answered. All questions and answers are based on the 2008 NEC...
Stumped by the Code?
Mar 25, 2010, By Mike Holt for EC&M Magazine
Your most pressing National Electrical Code (NEC) questions answered. All questions and answers are based on the 2008 NEC...
Commercial Loads — Part 2
Mar 25, 2010, By Mike Holt, NEC Consultant
Calculating commercial receptacle loads and understanding the optional calculation method...
Wiring Methods — Part 1 of 3
Mar 1, 2010, By Mike Holt, NEC Consultant
How to correctly install the wiring methods of Chapter 3 with the help of Article 300...
The SCCR Liability Trap
Feb 1, 2010, By Peter R. Walsh, P.E., Ferraz Shawmut
Short circuit current rating (SCCR) requirements can be a serious liability for your company, your customer, and your supplier relations. Just knowing...
Illustrated Catastrophes
Jan 1, 2010, By Brian J. McPartland, NEC Consultant
Whoever performed this installation must not have even known that the NEC has rules for temporary wiring....
Commercial Loads — Part 1
Jan 1, 2010, By Mike Holt, NEC Consultant
The electrical load requirements for commercial installations result in a great deal of diversity in usage....
Stumped by the Code?
Jan 1, 2010, By Mike Holt, NEC Consultant
Q. Do I need a grounding conductor for a pole light, or is the ground rod good enough? ...
Illustrated Catastrophes
Dec 1, 2009, By Brian J. McPartland, NEC Consultant
As usual, never consider the following commentary associated with these photos as a formal interpretation of the National Electrical Code (NEC). Without criticizing anyone or any product, the following scenarios present us with serious safety questions....
Multifamily Dwelling Unit Service and Feeder Calculations
Dec 1, 2009, By Mike Holt, NEC Consultant
How to calculate the service for a single-family or a multifamily dwelling...
Cranes, Hoists, and the NEC
Nov 1, 2009, By Mark Lamendola, Electrical Consultant
Avoid confusion before your next lift by learning the National Electrical Code requirements in Art. 430 and 610...
Code Quandaries
Nov 1, 2009, By Mike Holt, NEC Consultant
Q. Is it legal to splice conductors in an "LB" fitting?...
Dwelling Unit Calculations
Nov 1, 2009, By Mike Holt, NEC Consultant
Apply demand factors for correct load calculations...
Illustrated Catastrophes
Oct 1, 2009, By Brian J. McPartland, NEC Consultant
As usual, never consider the following commentary associated with these photos as a formal interpretation of the National Electrical Code (NEC). Without criticizing anyone or any product, the following scenarios present us with serious safety questions....
Health Care Facilities
Oct 1, 2009, By Mike Holt, NEC Consultant
Article 517 provides the requirements for those parts of health care facilities involving examination and treatment of patients...
