A temporary distribution box brings several usable connections closer to the work. Selection starts with the source and loads, then the outlets, protection, cable routes and handling arrangements needed for the job.
Identify source and loads separately
Record input voltage, phase, frequency and available capacity. List the actual tools, lights and other equipment with their electrical requirements. A matching plug shape does not establish adequate capacity or compatible voltage.
Compare outgoing circuits
Check receptacle types, branch protection, required GFCI arrangements and the number of circuits available. Separate transformer capacity from output-circuit ratings on an assembly that changes voltage. Review simultaneous use rather than simply adding outlet counts.
Keep cables and handling practical
Choose cord lengths and conductor sizes for the actual load and route. Protect flexible cables from sharp edges, vehicles and pinch points, and maintain access to controls and disconnects. Review supports, lifting provisions and enclosure exposure for the selected model.
Verify installation and approval
Grounding, bonding and protective devices serve distinct functions and must follow the applicable rules and equipment instructions. For a classified area, general industrial or weather-resistant construction is not enough: establish the exact assembly's approval and permitted location.
Portable power distribution et transformer assemblies serve different supply arrangements. Confirm input and output before choosing the equipment format.
References: OSHA 1926.405 — Temporary wiring and portable lighting · OSHA 1910.307 — Hazardous (classified) locations