ABB Inora 1 Gang 10AX Intermediate Switch, Small Rocker Classic Grey BL119S-G

An intermediate switch changes the connection between the two strapper conductors in a multi-way lighting circuit. It is installed between two 2-way switches, allowing the same light to be switched from three locations. Additional intermediate switches can be added between the two end switches when control is required from four or more locations.

This model is specifically intended for intermediate switching and is normally used with compatible 2-way switches. It should not be selected as a direct replacement for a standard 1-way switch without checking the circuit design and terminal configuration. An electrician should confirm the required switch type before installation.

The 10AX marking indicates a nominal switching rating of 10 A for lighting applications, with the AX classification intended to accommodate the higher inrush characteristics associated with certain fluorescent, inductive or electronic lighting loads. The connected load, LED driver inrush current, power factor and circuit protection must still be checked against the manufacturer’s technical requirements.

It can be used in appropriately designed LED lighting circuits, subject to the total connected load and the inrush current of the LED drivers. Multiple LED drivers can create a momentary current significantly higher than their normal operating current. For large lighting groups, consult the driver data and consider using a suitably rated contactor or control device.

In UAE projects, intermediate switches are commonly specified for villa staircases, long corridors, hotel rooms, office passageways, warehouses and multi-entrance spaces. They are useful wherever occupants need to operate the same lighting circuit from three or more positions, improving convenience and supporting practical building layouts.

Installation should be completed by a qualified electrician. The circuit must first be isolated, locked out where applicable and tested to confirm it is dead. The intermediate switch is then connected between the two end 2-way switches using the designated strapper terminals. Conductors must be correctly identified, securely terminated and arranged without damaging insulation before the switch is fixed, aligned and electrically tested.

A conventional intermediate switch generally uses two pairs of strapper conductors, providing four switched connections at the device. The exact cable arrangement depends on the project wiring method and circuit design. Protective earthing must also be maintained where required, and conductor identification should follow the approved drawings and applicable wiring regulations.

Yes. A lighting circuit can include two 2-way switches at the end positions and one or more intermediate switches between them. This arrangement permits control from four or more locations. Every device must have a compatible function and rating, and the complete circuit should be continuity-tested and function-tested after installation.

The switch is relevant to residential and commercial projects in the UAE when its rating, wiring configuration and installation environment match the approved project specification. Installation should comply with applicable UAE authority requirements, local utility regulations and the project’s adopted wiring standard, commonly based on BS 7671. Final acceptance remains subject to the consultant and relevant authority.

The BL119S-G should only be installed in locations compatible with its declared environmental and ingress-protection rating. In bathrooms, wet kitchens, exterior walls or exposed outdoor areas, a suitably IP-rated accessory and enclosure may be required. UAE heat, humidity, dust, condensation and water exposure must be considered during product selection.

Contractors should confirm the model number BL119S-G, 1-gang intermediate function, 10AX rating, small-rocker format, Classic Grey finish, compatible Inora accessories, mounting-box requirements and approved project schedule. They should also verify the number of control points and ensure that matching 2-way switches are included for the two ends of each multi-way circuit.

It may be used for retrofit work if the existing back box, wiring depth, conductor arrangement, accessory dimensions and finish compatibility are suitable. Older installations should be inspected for damaged insulation, missing earth continuity, loose terminals and non-standard wiring. Replacing a switch alone will not convert a 1-way circuit into a three-location circuit without the required additional cabling.

The electrician should verify protective-conductor continuity where applicable, insulation resistance, polarity, terminal security and correct operation from every switching position. The circuit protective device and connected lighting load should also be checked. Testing and documentation should follow the approved project method statement and applicable UAE electrical requirements.

Isolate the electrical supply before inspection or maintenance. Clean the visible surface with a soft, dry or slightly damp cloth and avoid abrasive pads, solvents and strong chemical cleaners that could affect the Classic Grey finish. Replace the device if the rocker becomes loose, operation is intermittent, terminals show heat damage or the faceplate is cracked.