Understanding Color-Coding: Blue and gray electrical boxes serve different purposes based on color-coding. Blue boxes are ideal for indoor residential, low-voltage, and renovation projects, while gray boxes are commonly used in industrial, commercial, and outdoor. Labérine Énergie offers electrical distribution cabinets: from 30 to 60 Amperes in Blue Tariff and from 160 to 400 Amperes in Yellow Tariff. Protected by a thick sheet metal casing, these distribution cabinets are designed for temporary installations and, thanks to double insulation, meet safety. What are the types of construction power distribution boxes? The type and scope of electrical equipment on construction sites is geared to the size and particular circumstances of each site. Using the types of distributor described in the equipment standards, it is possible to set up a power supply. This guidance is aimed at those responsible for planning and subsequent management, and those who control the installation and use of electrical systems and equipment on construction sites. Order this product from HSE Books It explains what to do to reduce the risk of accidents involving. That is why E-abel designs temporary distribution boxes as complete outdoor power systems, not just painted metal cabinets with sockets on the side.