The equipment within these boxes varies: primary distribution cabinets usually contain isolating switches, circuit breakers, and residual current devices (RCDs); secondary cabinets contain large three-phase circuit breakers; tertiary cabinets contain single-phase circuit breakers. Primary distribution systems consist of feeders that deliver power from distribution substations to distribution transformers. It is specially designed for the special situation of the project construction site and meets the relevant construction power specifications and standards of the. ENERGYBOX is a complete range of Assemblies for Construction Sites (ACS) pre-wired boards that can be wall-mounted or installed on a support. The panels are made in a sturdy and handy two-component technopolymer cabinet with a fire-resistant backrest, which allows them to be stored and reused in.