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

August 2010
Electrical Contractor readers requested an article explaining a simplified method for calculating a load for a commercial or industrial facility. Let’s arrange these loads in systematic order so that it is easier to derive a total load. Commercial and industrial facilities, such as offices, banks, restaurants, refineries and similar occupancies, are equipped with diverse loads. READ MORE
July 2010
This article, second in a series, addresses design letters and code letters and how they are used in motor-circuit design and installation. It highlights the different characteristics of letters and why it is sometimes desirable to choose one over the other. Design letters The starting torque of a motor varies with its classification. READ MORE
June 2010
Often while instructing a workshop, I receive the question about how design letters and code letters are used when designing and installing motor circuits. To begin with, we must understand that motor circuitry must be designed to provide protection for motor windings and components when motors are starting, running and driving loads. READ MORE
May 2010
I visited with a contractor friend’s engineer and electrician who were assigned to inspect a number of existing manholes on the property of a large industrial site. I was informed that they had the responsibility to verify if the load-side installation of the manholes complied with the procedures of the National Electrical Code (NEC) and, if they did, which sections of the NEC applied. READ MORE
April 2010
The foreman for a group of electricians wiring an industrial facility sent me an e-mail asking a number of installation questions based on the National Electrical Code (NEC). According to the foreman, the engineering firm, the contractor and authority having jurisdiction (AHJ) disagreed on the application of the Code. READ MORE
March 2010
Lately, I’ve received a number of inquiries from contractors concerning the installation of lightning protection systems. Those electrical contractors’ main concerns are how to begin to design and install such a protective system and who or what entity requires or regulates its installation. READ MORE
February 2010
An electrical contractor recently asked me about a municipality that inspected electrical signs and outline lighting systems at in-house manufacturing facilities. His question regarded the Underwriters Laboratories (UL) listing requirement of those signs and outline lighting systems and if the city could approve them by their electrical ordinance and place compliance stickers on the enclosures. READ MORE
January 2010
National Fire protection Association (NFPA) 70B (Recommended Practice for Electrical Equipment Maintenance) contains the requirements to perform frequency inspections and evaluate components of equipment for safe operation. Understanding the basics of the most-used annexes in 70B is useful to maintenance personnel. Annex A READ MORE
December 2009
In November, I covered the layout of National Fire Protection Association (NFPA) 70, the National Electrical Code. Here, I discuss the layout and use of NFPA 70E and its relationship to NFPA 70. NFPA 70E READ MORE