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

December 2012
How do you design, protect and locate a dry-type transformer of 600 volts (V) or less so that the installation will comply with the National Electrical Code (NEC)? READ MORE
November 2012
A good client summoned me to investigate an accident that occurred when a maintenance electrician was replacing a 30-ampere (A), bolt-in circuit breaker. An electrical arc developed while the electrician was changing out the circuit breaker. My client wanted to know which code or standard applied to this type of installation and if the electrician violated them during the replacement procedure. READ MORE
October 2012
Lately, I have received questions about the number of disconnects permitted for a building or structure. In one query, an inspection found more than six disconnects were present in an oil and gas refinery building, and it took more than six throws of the hand to disconnect incoming power supplies. READ MORE
September 2012
A contractor asked me to inspect the grounding and bonding of a service that he installed for a customer. He was told that the service had been grounded wrong and that it was dangerous to be powered up by the utility. Therefore, the owner would not pay the contractor for services rendered. READ MORE
August 2012
Through the years, I have instructed many seminars for folks using NFPA 70E, the Standard for Electrical Safety in the Workplace. Participants often ask the same questions. Here are the most frequently asked questions about NFPA 70E. Does 70E apply to personnel performing electrical installations? Yes, it does. See Section 90.2(A) and (A)(1) in 70E. READ MORE
July 2012
Lately, inspectors from a third-party inspection company have been asking me about determining the number of circuits required for outlets installed in dwelling units. The supervisor wanted to know what method his inspectors could use to get a general idea of the number of circuits necessary to supply these outlets. READ MORE
June 2012
Participants at one of my recent workshops had questions pertaining to reverse-fed transformers (back-fed). The input side was 480 volts (V), three-phase, and the output side was 120/208V. They wanted to know if the output side of 120/208V transformer could be used as an input side, and if so, how was the electrician to bond and ground the transformer? READ MORE
May 2012
In many workshops that I have instructed recently, installers have asked if the National Electrical Code (NEC) permits an appliance to be added to an existing 20-ampere (A) branch circuit without having to route an individual branch circuit. READ MORE
April 2012
While teaching codes and standards across the United States, the question often arises why the National Electrical Code (NEC) incorporates so many requirements for signage. For example, orange has historically served as a warning to electrical personnel. The orange high-leg in a delta system usually signifies that the voltage is 208 volts (V) to ground. READ MORE