Concealed Distribution Box Installation Guide

A concealed distribution box should be embedded in the wall, securely fixed, properly wired, and clearly labeled for safe and efficient operation.Step 1: Prepare the Wall OpeningReserve a hole in the wall 20mm larger than the distribution box in both length and width.The depth should equal the thickness of the box plus the plastering layer on the inner wall .Ensure the location is accessible, away from water, flammable, or corrosive substances, and allows for future maintenance .Step 2: Fix the Distribution BoxPlace the box in the reserved hole and embed it in masonry or concrete to secure it.Ensure the box is level and vertical, with a vertical deviation of no more than 3mm .Fill any gaps around the box and coat contact surfaces with anti-corrosion paint to prevent rust .Step 3: Wiring PreparationCut insulation from wires, leaving enough exposed conductor for secure connections .Connect the power line to the terminal of the intermediate contact and the load line to the threaded terminal for safe fuse operation .Install circuit breakers according to your electrical load requirements.Separate neutral (N) and protective earth (PE) busbars, and number them for clarity .Step 4: Connect and Organize WiresConnect input and output wires to the corresponding terminals, following color coding standards.Route wires neatly inside the box, securing them with cable ties and leaving space for heat dissipation .Avoid tangling wires or contact with sharp edges to prevent damage.Step 5: Label and TestLabel each circuit clearly for future maintenance and troubleshooting .Perform an insulation resistance test to ensure proper electrical safety before reconnecting power .Safety TipsAlways turn off the main power supply before installation.Use insulated tools and wear protective equipment.If unsure, hire a qualified electrician to avoid risk of electric shock or fire . Following these steps ensures a secure, safe, and professional concealed distribution box installation, ready for reliable electrical distribution and future maintenance.