Did you know that conduits on the rooftops of commercial buildings can run more than 70°F hotter than surrounding temperatures? For example, depending on the height of the conduit above the surface of ...

Type AC cable installed in thermal insulation shall have conductors that are rated at 90°C. The ampacity of the cable in this application shall not exceed that of a _____ rated conductor. Article 320 ...

My first job in the trades was as an electrician’s apprentice doing tasks, such as pulling wire, building light fixtures, and moving scaffolding in grocery store renovations. I moved into HVACR and ...