US Patent 7214875 Large volume electrical box with internal mounting arrangement

A two-piece electrical box including a box member having a channel formed in one sidewall. An insert can be locked into the channel to form an electrical enclosure. The insert includes an internal mounting arrangement for mounting the electrical box in either new work or old work applications. The combined box member and insert with the internal mounting arrangement provides an electrical box having a significantly larger internal volume than prior art one-piece molded electrical boxes.