ABB Metal Clad 1 Gang 2 Way 10AX Switch BM105

One gang means the unit operates one lighting circuit. Two way means that the same circuit can be controlled from two separate switch locations when the BM105 is paired with another suitable two-way switch. The 10AX designation indicates a 10 A switch rating with additional suitability for lighting loads that can create higher inrush currents, subject to the connected load, ABB technical data and applicable electrical regulations.

The ABB BM105 is commonly used in garages, workshops, warehouses, service corridors, utility rooms, plant rooms, construction site facilities and back-of-house commercial areas. It can also be used in residential spaces where a durable surface-mounted metal accessory is required. The installation environment must remain within the conditions specified by ABB.

Yes. Its two-way configuration allows one lighting circuit to be operated from two positions, such as at both ends of a corridor, at the top and bottom of a staircase, or at two entrances to a room. A second compatible two-way switch and the correct interconnecting conductors are required.

The BM105 is relevant to UAE projects requiring durable metal-clad wiring accessories and is intended for use on compatible low-voltage lighting circuits. UAE supplies are typically 230 V, 50 Hz, but the product rating must be confirmed from the ABB datasheet or product marking before installation. Selection and wiring should comply with the latest requirements of the relevant UAE authority, project specifications and applicable standards.

Installation should be completed by a qualified electrician. The circuit must first be isolated, locked off where required and proven dead with an approved tester. The supply and switched conductors should then be identified and connected to the terminals according to the ABB wiring diagram. For two-way operation, the common and strapper conductors must be correctly terminated at both switches. All terminals should be tightened to the manufacturer's specified torque before the enclosure is secured and the circuit is tested.

Yes, exposed conductive metal parts must be effectively connected to the circuit protective conductor where required by the product design and applicable wiring regulations. Earth continuity should be verified after installation. Never rely only on mounting screws or conduit contact unless that method is specifically permitted and proven to provide reliable protective continuity.

Metal-clad switches are commonly selected for surface installation on concrete, blockwork and other solid construction surfaces. Use fixings suitable for the substrate, keep the enclosure level and route cables through appropriate entry points with suitable bushes, glands or conduit fittings. Cable entries must be finished carefully to prevent insulation damage and preserve the intended level of mechanical protection.

The 10AX rating is intended for lighting applications, including loads that may produce elevated switching currents. However, LED drivers, fluorescent control gear and other electronic equipment can have substantial inrush current. The total connected load, driver inrush data, switching frequency and ABB technical limits should be checked before use; a suitably rated contactor or control device may be needed for larger lighting circuits.

Do not assume that metal-clad construction makes the switch weatherproof. Outdoor use should only be considered if ABB confirms a suitable ingress-protection rating and the complete installation provides the required resistance to rain, dust, condensation, heat and UV exposure. For exposed UAE locations, use a properly rated weatherproof accessory or protective enclosure selected for the site conditions.

Project teams should review the switch rating, circuit load, wiring method, mounting surface, earthing arrangement, cable-entry protection and environmental exposure. Coordination with electrical drawings, approved material submittals and local authority requirements is essential. In areas exposed to impact, dust, moisture or corrosive substances, additional protection or a different enclosure rating may be necessary.

Cable size cannot be selected from the switch rating alone. It depends on circuit design current, protective device rating, installation method, cable length, voltage drop, ambient temperature, grouping and local regulations. The chosen conductor must also fit the BM105 terminals within ABB's stated capacity. A qualified electrical engineer or electrician should determine the correct cable size for the project.

Before energising, the installer should inspect terminal tightness, conductor identification, earth continuity and enclosure security. Relevant electrical tests may include continuity of protective conductors, insulation resistance, polarity and functional operation from both switching positions. Results should be recorded where required by the project specification and the applicable UAE authority.

Periodically inspect the switch for loose mounting, damaged cable entries, corrosion, overheating, arcing marks or abnormal operation. Isolate and prove the circuit dead before opening the enclosure or tightening connections. Clean only with a dry or lightly damp cloth and avoid abrasive or conductive cleaners. A damaged, overheated or unreliable switch should be replaced by a qualified electrician.

Check the model number BM105, one-gang two-way configuration, 10AX rating, mounting arrangement, terminal capacity and environmental requirements against the approved electrical schedule. Buyers should also confirm compatibility with the circuit voltage, connected lighting load, wiring system and relevant UAE project or authority specifications before ordering.