Section 525.22. Portable Distribution or Termination Boxes. Portable distribution or termination boxes must comply with all of the requirements of this § 525.22.

(A) - (D) {As in NEC}

(E) Junction Boxes.

Taps and connections within 8 feet (2.44 m) of the ground must be made in junction boxes that are kept locked at all times when the public is on the grounds. Metal junction boxes must be grounded.