Anchor Roma 1M & 2M Metal Box

Key Specifications & Features Module size: Designed to accommodate 1 or 2 modules (1M/2M) side-by-side in a standard modular mechanism layout. One listing shows for model 21780: “1 or 2 Module” width. Model / part number: Model No. 21780 is cited for the 1-/2-module metal box variant. Dimensions: One price-list shows for “Concealed GI Sheet Metal Boxes – 1 or 2 Module” size ~ 7.9 cm × 7.5 cm × 4.6 cm. Material & build: Constructed from galvanised iron (GI) sheet metal / metal body — durable for installation inside walls or surface depending on variant. For model 21780: “Concealed GI Sheet Metal”. The datasheet says “GI Boxes with 120 GSM Zinc Coating … 250 Hrs protection against red-rust”. Earthing terminal provided (in many metal boxes) for safe wiring and grounding. Use type: For concealed wiring / flush mount installations typically — to house modular switches/sockets behind the wall plate. The metal box becomes a secure mounting and wiring junction box. Compatibility: Designed for the Anchor Roma modular accessory system—cover plates, switches and sockets sized for this box will align properly. Finish / additional features: The listing for 21780 mentions “Rust prevention up to 250 hrs. in salt spray test (Red Rust)”. Suitable for both home & commercial wiring installations. --- Typical Use & Considerations Ideal when you are installing a switchboard with one or two modules (switch, socket or data outlet) and you want a metal flush-mounted box craftily installed behind the wall before fixing plate + mechanism. Use in concealed wiring channels where a recessed box is required: you fix this metal box into the wall or brick/duct, then conduit or wiring enters it, mechanism is mounted, front plate snaps on. In a location like Chennai / Tamil Nadu (with humid/coastal conditions), the metal box’s rust-protection (zinc coating, GI sheet) is particularly beneficial — reducing corrosion risk for long-term reliability of the wiring assembly. Using the correct box helps ensure the final switch/socket + plate sits flush, aligns cleanly and flush with the wall surface—important for appearance and function. --- Things to Verify / Before Purchase & Installation Confirm the module width requirement: This box is for 1M or 2M modules (one or two adjacent mechanisms). If your configuration has more modules (3M, 4M, 6M etc), select the corresponding larger box size. Verify the part number and size — ensure it matches your wiring and wall mounting location (use model 21780 for 1/2M metal box). Ensure your wall back-box / masonry cut out fits the metal box dimensions (approx 7.9 × 7.5 cm) and depth (~4.6 cm) so the mechanism and front plate will sit properly without protrusion or misalignment. Consider the material environment: While GI sheet metal is good, ensure the mounting region is stable, no excessive moisture or corrosive environment without additional protection. Ensure your mechanisms and front plates (switches, sockets) belong to the Anchor Roma modular system so sizing, screw alignments, cover plate fit correctly. Using unrelated mechanisms may cause mis-fit. Secure installation: Make sure the metal box is firmly anchored or embedded, conduit entry is correct, earthing terminal is properly used, wiring is well done — the box is only the shell; wiring quality matter