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 ...

When using conductors 4 AWG and larger, you must size pull boxes, junction boxes, and conduit bodies per 314.28. Let's dig right in and see what 314.28 requires, based on the necessary type of ...