Jim Dollard has an extensive background in codes and standards. Send questions about the National Electrical Code (NEC) to Jim at codefaqs@gmail.com. Answers are based on the 2020 NEC. Office partitions Can free-standing...
Jim Dollard has an extensive background in codes and standards. Send questions about the National Electrical Code (NEC) to Jim at codefaqs@gmail.com. Answers are based on the 2020 NEC. Bollards required? Does the NEC require...
Jim Dollard has an extensive background in codes and standards. Send questions about the National Electrical Code (NEC) to Jim at codefaqs@gmail.com. Answers are based on the 2020 NEC. Closet LED fixtures Are surface-mounted...
In my August column, I reviewed some basic rules and procedures for troubleshooting power quality problems. Like water that flows downhill, PQ disturbances must obey the laws of physics. When reviewing data from customers who...
In the years working with design engineers for PQ instrumentation, occasionally all of the engineers would gather around a project that had a significant failure and resulted in a smoke cloud wafting up to the lab ceiling. We...
Take care when replacing circuit breakers and fuses in existing services and panelboards at single-, two- and multifamily homes. Older single- and two-family homes with 100A to 200A, 120/240V single-phase services were...
Switching out circuit breakers or fuses in existing homes Care must be taken when replacing circuit breakers and fuses in existing services and panelboards at single- family, two-family and multifamily dwellings. Older single...
Jim Dollard has an extensive background in codes and standards. If you have a query about the National Electrical Code (NEC) , Jim will help you solve it. Send questions to codefaqs@gmail.com. Answers are based on the 2017...
In February, IEEE Access published an article outlining a study by Jesse Aronstein and David W. Carrier, “Molded Case Circuit Breakers—Some Holes in the Electrical Safety Net.” The study claims testing found certain brands of...
