ABB Inora 1 Gang 13A Switched Fused Connection Unit with Illumination Starry Black BL507-885

A 13A switched fused connection unit is used to connect and locally isolate fixed electrical equipment while protecting the outgoing load with a replaceable fuse. Typical applications may include water heaters, extractor fans, kitchen appliances, pumps, signage, control equipment and other compatible fixed loads. The appliance rating, cable size, circuit protection and manufacturer instructions must be checked before use.

The integrated LED provides a visible status indication. Its exact operation can depend on the product terminal arrangement and installation method, so the wiring diagram supplied with the unit should be followed. The LED is useful where users or maintenance teams need a quick visual indication of the connected circuit's status.

It can be considered for compatible UAE residential, commercial and construction projects where a 13A fused connection unit is specified. Installers must verify the unit's marked voltage, frequency, approvals and installation requirements against the project specification and the regulations of the relevant UAE authority, such as DEWA, ADDC, SEWA or the applicable local utility. Installation should also follow current UAE electrical and fire-safety requirements.

Only when the connected equipment's rated current, starting current and isolation requirements are within the FCU's specifications and the appliance manufacturer permits this connection method. Many air conditioners and higher-power water heaters require a dedicated circuit and a higher-rated double-pole isolator rather than a 13A fused connection unit. A qualified electrician should calculate the load before installation.

The incoming supply and outgoing load conductors must be connected to the correctly identified line, neutral and earth terminals in accordance with the ABB wiring diagram. Isolate and verify the circuit is dead before work begins, use a compatible mounting box, maintain correct conductor polarity, terminate the protective earth, tighten terminals to the specified torque and fit the appropriate fuse. The circuit should then be tested before energisation. Installation must be completed by a qualified electrician.

Use only the fuse type and maximum rating specified by ABB for the BL507-885. A 13A fuse is not automatically correct for every appliance; a lower fuse rating may be required to protect the connected equipment and flexible cable. The electrician should select the fuse according to the appliance rating, cable capacity and manufacturer instructions, using an approved fuse compliant with the applicable standard.

No. The fuse inside the FCU provides local downstream protection for the connected load, while the distribution-board circuit breaker protects the fixed circuit wiring against overcurrent. Required RCD or RCBO protection must also be provided separately where specified. The FCU, breaker, cable and connected appliance should be coordinated as one electrical protection system.

Contractors should confirm the 13A rating, marked operating voltage and frequency, terminal capacity, fuse specification, switching arrangement, mounting-box compatibility, ingress-protection requirements and relevant product certifications. They should also verify that the Starry Black finish matches the approved material schedule and that the unit satisfies consultant, MEP and local authority requirements.

Do not install it directly outdoors, in bathrooms or in other damp, dusty or exposed locations unless ABB documentation confirms a suitable ingress-protection rating and the installation complies with the required electrical zones. For exposed UAE environments, use an appropriately rated weatherproof enclosure or select a dedicated outdoor FCU designed for heat, dust and moisture conditions.

Use the mounting box format and minimum depth specified in the ABB product documentation, allowing sufficient space for conductors without sharp bends or compression. Cable type and cross-sectional area must be selected according to the circuit design, connected load, installation method, ambient temperature, voltage drop and protective device. Terminal capacity should be verified before procurement and installation.

Periodically inspect the faceplate, switch, LED, fuse carrier and surrounding wall for looseness, cracking, discolouration or overheating. If the fuse repeatedly operates, do not install a higher-rated fuse; isolate the supply and investigate the appliance, wiring and load. Any internal inspection, fuse replacement beyond routine user access or terminal tightening should be undertaken safely by a competent electrician.