Article 210 in the National Electrical Code (NEC) covers branch circuits, with the exception of circuits that supply motor loads only. Article 430 covers these branch circuits, and Part II covers motor-circuit conductors.
A reader wrote in that an inspector had turned down one of his projects, citing the installation was in violation of National Electrical Code (NEC) 517.13(A) and (B) because Type MC cable was installed in the patient-care areas.
As most of you know, the codes and standards for fire alarm and mass notification systems change on a three-year cycle. New technology and more refined occupant needs top the list of reasons for most changes.
A large majority of commercial building energy codes in the United States are based on either the ASHRAE/IES 90.1 energy standard or the International Energy Conservation Code (IECC) model code. Both feature increasingly stringent requirements for lighting controls.
Article 430 of the National Electrical Code (NEC) covers motors, motor branch-circuit and feeder conductors, motor branch-circuit and feeder protection, motor-overload protection, motor-control circuits, motor controllers, and motor-control centers.
One of my responsibilities over the years has been to field questions from our members and authorities having jurisdiction (AHJs) to help them find and understand code requirements. I have benefitted from the process as well.
The 2014 National Electrical Code (NEC) has new requirements for field-applied hazard warning markings, signs and labels. Throughout the NEC, rules that required signs, labels and other markings also required a specific signal word be included in the sign, label or marking.
Energy management is becoming commonplace in today’s electrical infrastructures through the control of utilization equipment, energy storage and power production. Yet, limited consideration is found in electrical installation standards to actively manage these systems.
Recessed housings have come a long way since their initial introduction into the marketplace. Today, more electrical contractors are using low voltage housings to provide task lighting and are including further accents with a full range of trims.
When I am performing construction administration services for my clients and ask contractors why they installed the fire alarm system the way they did, they often lament, “That’s all the code required!”
I receive questions and stories about installer experiences with code-compliant fire alarm systems in the field, many relating to issues about the use, application and installation requirements of visible and audible notification appliances.
In my last column, I discussed the ICC code process. This month, I look at the NFPA process. As I previously mentioned, the ICC and NFPA have completely different processes for codes and standards development. Yet, both operate on three-year cycles.
Installation requirements for arc-fault circuit interrupters (AFCI) in 210.12 of National Electrical Code (NEC) have been modified considerably in the past three NEC cycles and have changed dramatically in the 2014 NEC.