ABB Inora 1 Gang 10AX Intermediate Switch, Small Rocker White BL119S

An intermediate switch is installed between two compatible two-way switches to control the same lighting circuit from three locations. Additional intermediate switches can be added when control is required from four or more points. Typical applications include corridors, staircases, villas, hotel rooms, offices and other areas with several entrances.

The 10AX designation indicates a nominal switching rating of 10 A and suitability for lighting loads with higher switching inrush characteristics than a basic resistive load. This is relevant to many fluorescent, LED-driver and other lighting circuits. The connected load, inrush current and circuit design must still be checked against ABB product documentation and the lighting manufacturer's specifications.

It can be used in appropriately designed LED lighting circuits, subject to the total operating current and, importantly, the LED drivers' inrush current. Several LED fittings may create a high momentary starting current even when their combined wattage is low. A qualified electrician should verify load compatibility and use a contactor or suitable control device where the lighting load exceeds the switch's capabilities.

An intermediate switch is not normally used by itself for two-location control. A standard two-way lighting arrangement requires two compatible two-way switches. The ABB Inora BL119S is added between those switches when control is needed from a third or subsequent location.

Installation generally involves isolating and proving the circuit dead, mounting a suitable flush or surface box, and connecting the paired traveller conductors to the intermediate switch terminals according to the wiring diagram supplied by ABB. The device is then secured, aligned and fitted with the appropriate Inora plate or accessory components. Terminal identification must be followed exactly, as an intermediate switch uses crossover connections rather than a simple line-and-load arrangement.

The switch should be installed and tested by a qualified electrician familiar with UAE electrical requirements and the rules of the relevant local authority, such as DEWA, ADDC or the applicable emirate's utility and municipality. The installer should verify conductor sizing, protective devices, earthing, enclosure suitability, circuit isolation and final operational testing before energising the installation.

A conventional mechanical intermediate switch normally changes the connection between traveller conductors and does not require a neutral at the switch mechanism. However, actual wiring arrangements can vary, and a neutral may be present in the back box for other equipment or future requirements. Always follow the marked terminals, ABB instructions and the approved project wiring diagram.

No. Although it has one rocker and controls one lighting circuit, the BL119S is an intermediate crossover switch rather than a standard single-pole on/off switch. It should be selected where the circuit design calls for multi-location control between two two-way switches.

Yes, it is suitable for indoor lighting-control applications in UAE villas, apartments and residential developments when installed as part of a compatible, correctly rated system. The white finish works well with common interior colour schemes, while the one-gang format is practical for corridors, staircases, bedrooms with multiple access points and large living areas.

Yes. The switch can be specified for offices, hotels, retail spaces, corridors and other commercial interiors that require one lighting circuit to be operated from several points. Project engineers should confirm the approved material schedule, load characteristics, accessory compatibility, required ingress protection and compliance with consultant and local-authority specifications.

The BL119S should not be assumed to be weatherproof based on the available product information. For outdoor locations, bathrooms, plant rooms or dusty and humid areas, it must be installed only within a suitably rated enclosure and where permitted by the applicable zone and electrical regulations. Select an accessory with the required IP rating when direct protection from moisture or dust is needed.

Confirm that the project requires an intermediate rather than one-way or two-way switch, that one gang and a small rocker match the design schedule, and that the white Inora accessory is compatible with the intended mounting box, support frame and cover plate. Also check the 10AX rating against the lighting load and driver inrush current, and use model number BL119S and SKU 82428-NOS to verify the exact item.

After completing approved electrical safety tests, operate the light from every control point and test all switch-position combinations. The light should change state correctly from each location without flickering, intermittent operation or abnormal heating. The electrician should also confirm secure terminations, correct insulation resistance, continuity where applicable and compliance with the project's testing and commissioning procedure.

Routine maintenance is generally limited to keeping the rocker and plate clean with a soft, dry or lightly damp cloth and checking for looseness, cracking, discolouration, buzzing or excessive heat. Do not use abrasive cleaners or spray liquid into the mechanism. Any fault investigation, tightening or replacement must be performed with the circuit safely isolated by a qualified electrician.