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With this in mind, if your fan does not have a timer you will not need to use 3 core cable to connect it simple 2 core and earth is all that would be required throughout.ĭiagram showing wiring method for an independently switched extractor fan Installing the Switched Fan It is acceptable to use 1.5mm too, anything larger is still safe but unnecessary and will prove more difficult to work with.Ĭable types required for the timer fan above are 2 core (twin) and earth. The Minimum cable size for fans like this is 1.0mm. However, using the method explained below, each stage of the installation can be easily followed and easily checked for errors or problems in the future with minimal risk of confusion. There are other ways to achieve this where the junction box connections are housed within the 3-pole isolation switch, but that is more complicated to explain and increases the chances of someting going wrong.
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Instead, we are going to install a new switch that will turn teh fan on and off. This wiring diagram shows an easy to follow configuration for a bathroom extractor fan fitted with a timer, that’s not going to be turned on by the existing light switch.
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Which ever one you are using, the wiring itself should be the same. The Isolation switch must be on a pull cord inside a bathroom or as in the diagram above, a switch on the outside. Isolation switch for use in bathrooms and special areas for isolating circuits Installing a Timed Fan Extractor It must also be possible to isolate the fan by means of a pull switch inside the bathroom, or a fan isolation (3 pole) switch outside of the bathroom.īefore attempting connecting up a timed fan or any other electrical connection, please ensure all circuits are off at the mains. Wiring an Extractor Fan With a Timed Switch That’s Turned on by Existing Light SwitchĮxtractor Fans with an integral timer or timed switch need a 3 core and earth supply to allow the unit to run on after a light is switched off. Do not run UTP cable outside of a building.Warning: To complete electrical works you must comply with Electrical Regulations – Click here for more information.No run (hub to device) may be over 90 meters long.Try to avoid running cables parallel to power cables and never run the wire parallel to power wiring nearer than 6" away.Never untwist the 2 wires in a single pair for more than 1/3-1/2" to make a connection (the twists are critical to cancel out interference between the wires).
#4 PIN FAN PINOUT BROWN BLUE TV#
Here's a short list: copy machines, electric heaters, speakers, printers, TV sets, fluorescent lights, copiers, welding machines, microwave ovens, telephones, fans, electric ovens, dryers, washing machines, and shop equipment. Keep cables away from devices which can introduce noise into them.Don't put so many wires in any conduits that it ends up more than 40% full.Watch especially when the wire comes out a drilled hole and turns don't let knots or kinks happen even temporarily. Never bend CAT5 wire tightly around a corner make sure it bends gradually, so that a whole circle would be at least 2" across.It's okay to snug them together firmly but don't tighten them so much that you deform the cables. If you bundle a group of cables together with cable ties, do not over-cinch them.Avoid periodic sags if the cable must sag, vary the intervals.Never put a staple through the wire (you knew that, I'll bet).Never step on or otherwise crush, kink, or crimp the wire (don't make staples or wire ties tight).Never pull / stretch CAT5 wire with more than 25 pounds of force.