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Schneider Electric NSYMM75 metal enclosure, 450×650×125 mm, wall-mounted distribution box
Schneider Electric NSYMM75 metal enclosure is a wall-mounted distribution box with external dimensions 450×650×125 mm. Constructed from galvanized sheet steel with a plain mounting plate sized approximately 700×500 mm, this enclosure is intended to house electrical devices and DIN-rail mounted components in residential and light-commercial installations. The robust metal body provides mechanical protection and an organized layout for cable entry and internal fittings while the compact footprint makes it suitable for narrow spaces and service cabinets.
The metal construction offers enhanced mechanical strength and electromagnetic screening compared with plastic enclosures. A plain galvanized mounting plate simplifies the installation of breakers, terminal blocks and other equipment without additional drilling or adapters. The shallow depth and wall-mount design make the enclosure easy to place in corridors, utility rooms or service cupboards while still accommodating standard DIN-rail components. Corrosion-resistant galvanization extends service life in typical indoor environments.
Mount the enclosure on a flat vertical surface using appropriate fixings for the wall material and the enclosure weight. Fit the galvanized mounting plate inside the box and arrange DIN-rail sections and devices on the plate according to the electrical layout. Route incoming and outgoing cables through the provided cable entry points or openings, secure conductors with appropriate clamps or gland plates, and ensure all connections comply with applicable electrical standards and local regulations. After wiring, close and secure the enclosure door to maintain mechanical protection and prevent accidental contact.
Use the enclosure indoors or in sheltered locations where it is not exposed to direct weather. Select appropriate cable glands and grommets for the cable entry points to maintain strain relief and prevent sharp-edge abrasion. Ensure ventilation or thermal planning if high-power devices are installed to avoid overheating. Follow local electrical codes for earthing/grounding and protective device placement.
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