What does a fan isolator switch do?

A fan isolator switch is normally used with an extractor fan to enable isolation of the fan for repair and maintenance and is fitted outside the room. Within the range there are many top trade brands to choose from and a wide selection of finishes and colours to suit the look and feel of any room.

Where do you put an extractor fan isolator switch?

The isolator should be located adjacent to the fan outwith Zones 0, 1 and 2 in accordance with Section 701 of BS 7671:2008 (2015). The switch need not necessarily interrupt the neutral conductor.

What is isolator switch in bathroom?

The idea of a fan isolator is so that the fan cannot become live accidentally during maintenance, but also functionally, so that you can switch off the fan without having to turn the lights off.

How do isolator switches work?

The main function of the Isolator is, it blocks the DC signals & allows the AC signals to flow. Circuit Breaker is one kind of protection device which works like a switch. When the fault happens in the system, it opens as well as closes the circuit contact.

Who can fit an isolator switch?

Any competent person can install an isolator switch, but it does require the main fuse to be pulled in some cases, unless the meter is one of the few that includes a built in isolator (in which case it’s questionable as to whether it’s worth fitting a second one).

Do I need a fused spur for an extractor fan?

The fan also requires a local means of switching off for mechanical maintenance (537.3. 2.5) and, therefore, a standard switch fused spur should suffice, unless there is a permanent live also required; in which case the switch will need to be double-pole.

Can a fan isolator go in a bathroom?

As far as isolation is concerned, the isolator must be in control of the person carrying out maintenance. Ie. in the same room, or lockable in the off position. Since we don’t like to put fan isolators and switches in bathrooms, that means it must be lockable in the off position.

How to wire a 3 pole fan isolator switch?

How to wire a 3 pole fan isolator switch. Extractor fan switch install wiring explained. – YouTube How to wire a 3 pole fan isolator switch. Extractor fan switch install wiring explained. If playback doesn’t begin shortly, try restarting your device.

Where is the pull switch on a bathroom extractor fan?

The bathroom lights are operated from a pull switch, the isolator switch is adjacent to the pull switch on the corridor side of a stud partition. Three core and earth has been run from the pull switch to the extractor fan.

How to wire a bathroom extractor fan to an isolator?

If the feed is at the pull-cord switch, loop a live in to the isolator off the switch, loop a switched live in to the isolator off the switch and a neutral off your light fitting to the isolator. As long as you have a live, switched live and neutral going to your isolator first, the rest is simple to feed to the fan, all as above diagram.

How does an extractor work with an isolator switch?

Incidentally the extractor will have a run on function if that makes any difference. If the feed is at the pull-cord switch, loop a live in to the isolator off the switch, loop a switched live in to the isolator off the switch and a neutral off your light fitting to the isolator.