This section will explain the simplest method of connecting power to your mobile office using a 50-amp plug. These easy-to-follow instructions make it simple, fast, and problem-free. Key details include: Standard Electrical Packages: Designed for 20' and 40' office and combo containers, these packages. r the Clearfield FAC 400 outdoor cabinet. This document also provides a general description of the cabinet and its subsystems, guidance for planning, site preparation, power installation, splicing to the outside plant, component installati ce, pursuant to Part 15 of the FCC rules.