Portable power distribution box dimensions

Portable power distribution boxes typically range from compact units around 7.5" x 18.5" to larger industrial boxes, with height varying based on amperage and outlet configuration.Typical DimensionsSmall to Medium Jobsite Boxes: Many three-phase portable boxes, such as the PowerHOUSETM Load Master®, measure approximately 7.5 inches long by 18.5 inches wide, with height varying depending on the number of circuits and protective devices installed .Standard Contractor Boxes: Temporary power distribution boxes for construction or events often house multiple 15/20A outlets, 30A, and 50A twist-locks. These units are built with heavy-duty steel and weatherproof covers, and their dimensions are generally compact enough for portability, typically around 12–24 inches in width and 18–30 inches in height, depending on the number of outlets and breakers .High-Amperage or Industrial Boxes: Larger units, such as 100A outdoor GFCI boxes, are designed for multiple circuits and heavy-duty use. These can be significantly taller and wider, often exceeding 24 inches in width and 36 inches in height, to accommodate multiple inlets, outlets, and protective devices .Factors Affecting DimensionsAmperage Rating: Higher amperage boxes require larger enclosures to house bigger breakers and bus bars.Number and Type of Outlets: Boxes with multiple 15/20A outlets, twist-locks, or Cam-type connectors will be wider or taller to fit all receptacles safely.Enclosure Material: Steel or impact-resistant rubber housings add to overall size, especially when weatherproof covers are included .Portability Features: Handles, feet, or mounting brackets can slightly increase the external dimensions.SummaryPortable power distribution boxes are designed to balance portability and functionality. Small jobsite units can be as compact as 7.5" x 18.5", while larger industrial or high-amperage boxes may exceed 24" x 36", with height adjusted for the number of circuits and protective devices. When selecting a box, consider the amperage, outlet configuration, and environmental protection requirements to determine the appropriate size for your application .