James G. Stallcup

Code Contributor

James G. Stallcup is the CEO of Grayboy Inc., which develops and authors publications for the electrical industry and specializes in classroom training on the NEC and OSHA, as well as other standards. Contact him at 817.581.2206.

Articles by James G. Stallcup

June 2011
I recently did a workshop for a major city experiencing problems with inspections on photovoltaic (PV) systems during and after installation. The problem was between the inspection and fire department. READ MORE
May 2011
Last month, I covered several requirements for small-wind (turbine) electric systems in the new Article 694 of the 2011 National Electrical Code (NEC). My intent for this series is to raise awareness of the new article and discuss its highlights. Wiring methods—694.30(A) and (B) This section covers the methods that can be used for the wiring on wind turbines. READ MORE
April 2011
Small wind electric systems can have alternating current (AC) outputs, direct current (DC) outputs or both, including electrical energy storage, such as batteries. READ MORE
March 2011
The grounded conductor is defined in Article 100 in the National Electrical Code (NEC), but this definition can cause confusion when it’s used in an electrical system. For example, the grounded conductor, as previously defined, could be a corner-grounded phase conductor per 250.26(4) and 250.20, Informational Note. READ MORE
February 2011
When inspiration strikes, I like to select certain sections and articles in the National Electrical Code (NEC) that apply to a particular subject and look at their application. I recently did this with optional standby generators. Students have asked questions in my workshops on what sections in the NEC are applicable when these systems are installed temporarily or permanently. READ MORE
January 2011
A law firm contacted me about an incident involving safe working clearances in and around electrical equipment. The attorney asked about the working space outlined in 110.26(A)(1) through (3) of the National Electrical Code (NEC) and wanted me to explain in a written report, as well as my knowledge would permit, my opinion of the requirements pertaining to this working space. READ MORE
December 2010
As a guest speaker at a meeting of electricians, I was asked to address how to determine the number of receptacles required for commercial buildings and if their installation requirements and spacing procedures were regulated in the same manner as for dwelling units. I was amazed at the -misinterpretations that concerned this subject. READ MORE
October 2010
At an installers’ workshop, questions kept popping up about Article 110.16 of the National Electrical Code (NEC). Installers wanted to know about the label markings required to be placed on switchboards and whose responsibility it is to install such markings. READ MORE
September 2010
I recently found out that electrical engineers and electrical personnel do not always use the same thought process when classifying low-voltage systems, such as Class 1, 2 and 3 circuits. For example, those working on systems over 600 volts (V) stated they considered low-voltage systems to be 600V or less. READ MORE