Fan Isolator Switches

It disconnects an extractor fan completely so it can be cleaned or serviced while the lights stay on. A bathroom fan is often wired into the lighting circuit, and the Knightsbridge listings describe this case: the lighting circuit is left live while the fan is isolated for maintenance. Isolators suit en-suite and family bathrooms, utility rooms and store rooms.

Because a fan with an overrun timer has two feeds, a permanent live and a switched live from the lighting circuit, and isolating it means breaking the two together with the neutral. A single or double pole switch would leave one feed connected. Every switch and module in this collection is a 10A triple pole isolator.

Yes, Knightsbridge GDM020 modules are 10A triple pole fan isolator modules for Knightsbridge Grid frames: the GDM020MB, for example, is a single-sized module that clips in from the front of the mounting frame, which is sold separately. Most GDM020 modules are engraved FAN ISOLATOR so the switch is easy to identify. For the Curved Edge grid system, the CUGM19 is the matching module.

Yes, key switch modules such as the Knightsbridge GDM021 range need a key to operate, which prevents unauthorised use, and the key is included. They are 10A triple pole grid modules in finishes such as brushed chrome (GDM021BC), matt black (GDM021MB) and polished chrome (GDM021PC). The CUGM19K is the key version for the Curved Edge grid system.

Finishes include white, matt white, pearl, polished and brushed chrome, polished, brushed and antique brass, black nickel, matt black, anthracite, gunmetal and smoked bronze, across plate styles such as the screwless SF1100, flat plate FP1100 and rounded-edge CL11. The SN1100 is a white thermoset plate with anti-microbial properties, sold in packs of 10.

Flat plate, screwless and rounded-edge models such as the FP1100BB, SF1100PB and CL11BC need a mounting box at least 16mm deep, so a shallow box is enough. The M1100 metal clad switch comes complete with its own back box. Check the box depth before buying for an existing installation, since older boxes can be shallower.

Yes, the Knightsbridge M1100 is a metal clad 10A triple pole fan isolator with its back box included, made for robust residential and professional installations. It is rated IP20, so fit it indoors. Metal clad switches suit surface wiring in plant rooms and workshops, where a plastic or decorative plate would be out of place.

Models such as the SF1100PB, FP1100BB and CL11BC state certification to EN 60669-1 and EN 60669-2-4, the standards for household switches and isolating switches. Most are also rated for a conditional short circuit current (Inc) of 1500A. Check the listing of the exact model if a specification calls for a named standard.