So you go through all that work to correctly size your raceway, only to find out during the acceptance inspection that you have to replace some boxes and re-pull all of the conductors. The client’s ...

Note: This article is based on the 2005 NEC. The sizing requirements for pull boxes, junction boxes, handhole enclosures, and conduit bodies exist to prevent conductor insulation damage. Those ...

It can be confusing when you go to cut in a new diffuser for an HVAC system. What size ceiling box do you use? What size grille do you use? What size should the hole be? How do you connect the sheet ...