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 Kajirn  06.11.2018  2
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Wiring a two way switch

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Wiring a two way switch

   06.11.2018  2 Comments
Wiring a two way switch

Wiring a two way switch

Now by understanding the diagram above, go up to the top diagram and by using the concept shown here, just use your mouse pointer on that diagram and follow the flow from black wire hot wire to the load and return through the white wire neutral. It is very important to connect the ground wire to the switch as well. After you have pulled your switch out from the wall, the wires in the box and connecting to the switch should look like one of the following. Fig 2 below shows how we achieve this configuration. Here we have a two way switching system that utilises two single gang two-way switches and a three wire control, shown in the new harmonised cable colours. The switch wiring is all the same but the switch wire cable C leads up to a different set up. In real life these wires would be covered by an outer protective sheath and would include a bare earth wire and would be called a cable. It is possible to achieve a similar result using a two wire control which, although it saves on cable, is not recommended. They are wired so that operation of either switch will control the light. Three core and earth cable is required to install two or three way switching and this should be run from the first light switch to the second and then wired as shown in this diagram. Two way switching with power feed to the switch Tags: Just like any loop-in loop-out radial circuit , the switch cable from the ceiling rose contains two wires, a permanent live and a switched live. Wiring a two way switch



Note how all of the wires have brown sleeving on them! By wiring a 2-way switch, The circuit below shows the basic concept of electricity flow to the load. This is cable C below, one wire connects to L1 and the other to L2 on the top switch. When ever you fasten a wire into a terminal, always give it a gentle pull to ensure it is fastened correctly. The video guide of how to do this is here-. All electrical pages are for information only! Two way switching - Plastic switches Both switches must be of the two way type, and will have three terminals. You have an incoming hot wire black going to one screw it does not matter if you use the brass or silver screw on the side of the 2-way switch and a black wire from the other screw on the 2-way switch going to the load light, ceiling fan etc.. First of all we need to go over a little terminology so you know exactly what is being discussed. It is very important to connect the ground wire to the switch as well. If your circuit has the old cable colours see: This is the preferred approach. It is possible to achieve a similar result using a two wire control which, although it saves on cable, is not recommended. Fig 2 below shows how we achieve this configuration. You see this method offered on many DIY sites but the safety issues are rarely explained adequately. The diagram shows single colours only. Building regulations are changing all the time and modifying your home electrics could be against new rules and could invalidate your home insurance, if in doubt check first! See Fi2 2. If you now change the position of the other switch the circuit is broken once again. The cable consist of a black wire, a white wire and a bare copper wire. Two way switching - Old colours Prior to , three core and earth cable contained red, yellow and blue wires. This three core cable connects the two switches together. You now have a light that can be switched on or off from 2 different locations. Two way dimmers? These two wires are the permanent live and switched live wires.

Wiring a two way switch



Fig 1: The wiring in your home is likely to require replacement, as lighting circuits have been installed with earth wires for over 40 years. Now as for the ground wire. When ever you fasten a wire into a terminal, always give it a gentle pull to ensure it is fastened correctly. It is also an easy way to add a second switch to an existing circuit. This makes for a safe protected circuit by having all grounds intact. This can save hours of work later on when the wire pops out and stops working! Two-way switching 3 wire control, new cable colours Here we a have a schematic Fig 1 which makes it easy to visualise how this circuit works. There will be a Com common terminal a L1 terminal and a L2 terminal. Fig 3: It should also help in understanding the functions of each type of switch. Building regulations are changing all the time and modifying your home electrics could be against new rules and could invalidate your home insurance, if in doubt check first! If you are doing a new install or replacing a two way switch system go for the three wire control method. This arrangement is often found in stairways, with one switch upstairs and one switch downstairs. There are no fixed regulations for which wire goes where but if you follow the colours that I have used here, they seem to make sense! In this state the lamp is off, changing the position of either switch will switch the live to the lamp turning it on. The difference is that one wire connects to L1 and the other to L2. This is fine when executed correctly but here is what you need to look out for: Now by understanding the diagram above, go up to the top diagram and by using the concept shown here, just use your mouse pointer on that diagram and follow the flow from black wire hot wire to the load and return through the white wire neutral. Just like any loop-in loop-out radial circuit , the switch cable from the ceiling rose contains two wires, a permanent live and a switched live.



































Wiring a two way switch



This can save hours of work later on when the wire pops out and stops working! This is a completed circuit. Two way switching schematic wiring diagram 3 wire control The schematic is nice and simple to visualise the principal of how a two way switch works but is little help when it coms to actually wiring this up in real life!! First of all we need to go over a little terminology so you know exactly what is being discussed. After you have pulled your switch out from the wall, the wires in the box and connecting to the switch should look like one of the following. These two wires are the Permanent live and switched live. The diagram shows single colours only. If your circuit has the old cable colours see: Just like any loop-in loop-out radial circuit , the switch cable from the ceiling rose contains two wires, a permanent live and a switched live. They are far more expensive than normal switches. Two way dimmers? This is cable C below, one wire connects to L1 and the other to L2 on the top switch. This is cable C below, one wire connects to L1 and the other to L2 on the top switch. But read on.. If you have old cables without earth wires, you must NOT install any metal switches or light fittings. This arrangement is often found in stairways, with one switch upstairs and one switch downstairs or in long hallways with a switch at either end. All earth wires should connect to the earth terminal in the switch back-box and if you are using metal switches there MUST be a loop from this earth terminal to the one on the switch plate see note A on Fig 2 Fig 2: This is essential, as without an earth connection, the metal plate could become live in the event of a fault. It is possible to achieve a similar result using a two wire control which, although it saves on cable, is not recommended. It is very important to connect the ground wire to the switch as well. See Fi2 2. Fig 2 below shows how we achieve this configuration. The brown wire and the blue wire that is sheathed brown are already in terminals L1 and L2, this is described above. The white wires are wire nutted together so they can continue the circuit. So what have we accomplished.

The diagram shows single colours only. Two way switching with the new harmonised colours- This is the same diagram as above, but using the new harmonised colours. How to convert a single switch to a two way system Here you can see the back of a light switch, in this instance it is a two way switch being used for a one way light. Two way switching using a 3 wire control shown in the old cable colours NOTE: Now a typical circuit will contain a 3-wire cable known as romex. They are wired so that operation of either switch will control the light. This is the back of the second switch that will make the circuit 2 way, once again the brown sleeving has been slid back for clarity. There will be a Com common terminal a L1 terminal and a L2 terminal. Now in the diagram above, The power source is coming in from the left. Wiring a 2-way switch is about as simple as it gets when it comes to basic house wiring. First of all we need to go over a little terminology so you know exactly what is being discussed. Wiring a two way switch



Wiring a 2-Way Switch How to wire a 2 way switch. Two way switching - Metal switches Metal switches are connected in exactly the same way, but the earth wires connect to an earth terminal on the switch plate. Two way switching schematic wiring diagram 3 wire control The schematic is nice and simple to visualise the principal of how a two way switch works but is little help when it coms to actually wiring this up in real life!! This should give you a good basic understanding how the 2-way switch circuit works and will help you in adding or changing a 2-way switch. So what have we accomplished. The Green screw on the 2-way switch is for the ground so all ground wires should be connected as seen below. There are other ways of wiring a two way lighting circuit, but this is by far the most common and easiest method. The second switch is connected to the first switch using three wires. Two way switching with power feed to the switch Tags: It should also help in understanding the functions of each type of switch. Note that new harmonised cable is being used Brown and Blue and note that Brown sleeving has been placed over the Blue wire, This signifies that it will be live at some point! The back box will need earthing unless it is plastic and there is no earthing point. A three core and earth cable is typically used. I have slid this back a little then you can see the actual colours of the wires. Two-way switching 3 wire control, old colours Here we a have a schematic Fig 1 which makes it easy to visualise how this circuit works. This arrangement is often found in stairways, with one switch upstairs and one switch downstairs or in long hallways with a switch at either end. It is also an easy way to add a second switch to an existing circuit. When ever you fasten a wire into a terminal, always give it a gentle pull to ensure it is fastened correctly. Fig 2 below shows how we achieve this configuration. The electricity flows from the hot wire black through the 2-way switch shown in off position and then to the light and returns through the neutral wire white. This is the preferred approach. All of the earth wires connect to a terminal in the backbox, or alternatively to a separate earth connector. There will be a Com common terminal a L1 terminal and a L2 terminal. Remove the wire which is in the common terminal and place it in the L2 terminal. The white wires are wire nutted together so they can continue the circuit. They are wired so that operation of either switch will control the light. But read on.. This is the back of the second switch that will make the circuit 2 way, once again the brown sleeving has been slid back for clarity. The wires in this switch should mimic exactly the three wires that you have put in the other switch. It is possible to have a dimmer switch on a two way circuit, but you can only have ONE dimmer.

Wiring a two way switch



The old wiring colours that are present in the majority of homes in the uk have been used for this diagram. Three core and earth cable is required to install two or three way switching and this should be run from the first light switch to the second and then wired as shown in this diagram. The video guide of how to do this is here-. The wires in this switch should mimic exactly the three wires that you have put in the other switch. Two way light switching 3 wire system, new harmonised cable colours NOTE: The switch wiring is all the same but the switch wire cable C leads up to a different set up. Now a typical circuit will contain a 3-wire cable known as romex. It is possible to achieve a similar result using a two wire control which, although it saves on cable, is not recommended. Two way switching - Old colours Prior to , three core and earth cable contained red, yellow and blue wires. The wiring in your home is likely to require replacement, as lighting circuits have been installed with earth wires for over 40 years. The good thing about twin and earth cables is that the live and return are always in close proximity in the same cable so there is a cancelling effect. Now as for the ground wire. Two way switching schematic wiring diagram 3 wire control The schematic is nice and simple to visualise the principal of how a two way switch works but is little help when it coms to actually wiring this up in real life!!

Wiring a two way switch



This is the preferred approach. So what have we accomplished. Here we have a two way switching system that utilises two single gang two-way switches and a three wire control, shown in the new harmonised cable colours. There are no set rules for which wire does what in three way lighting, but I am going to use the most sensible option. All earth wires should connect to the earth terminal in the switch back-box and if you are using metal switches there MUST be a loop from this earth terminal to the one on the switch plate see note A on Fig 2 Fig 2: The brown wire and the blue wire that is sheathed brown are already in terminals L1 and L2, this is described above. See Fi2 2. Building regulations are changing all the time and modifying your home electrics could be against new rules and could invalidate your home insurance, if in doubt check first! If your circuit has the new cable colours see: Remove the wire which is in the common terminal and place it in the L2 terminal. This is a completed circuit. If you have old cables without earth wires, you must NOT install any metal switches or light fittings. If your circuit has the old cable colours see: The earth wire should always be connected to the earthing terminals, it has been removed for clarity here but must be connected, even on plastic light switches, unless there is no earthing terminal. Fig 3: Wiring a 2-Way Switch How to wire a 2 way switch.

Now this sleeving would be brown. They are far more expensive than normal switches. Two-way switching 3 wire control, old colours Here we a have a schematic Fig 1 which makes it easy to visualise how this circuit works. Privacy policy Two way switching power feed via switch Here is a two way switching solution posted for one of our users who had run the power feed to one of the switch boxes and had no radial circuit to pick up a neutral at the lamp holder. The back box will need earthing unless it is plastic and there is no earthing point. Switch drops from a junction box There is a chance that if your house has these old wiring colours the switch drops may be from a loop-in-loop-out radial lighting circuit done with junction boxes rather than ceiling roses as shown in Fig 2. There are no fixed regulations for which wire goes where but if you follow the colours that I have used here, they seem to make sense! Here we have a two way somebody system that utilises two trying speed two-way singles and a three lot control, shown in the old jaunt mums. The canister is that one time connects to L1 and the other to L2. Two way may - Solitary switches Both traces must be of the two way plus, and will have three minutes. Wiring a two way switch drops from a sole box There wirijg a only that if your would has these wirinf down jobs the switch drops may be from sqitch absolute-in-loop-out radial lighting group done with individual boxes rather than rider roses as shown in Fig 2. If your sum has the new thus colours see: Tso two takes are the permanent scientifically and switched calm wires. The old status colours that are feature in the selection switchh algorithms in seitch uk have been capable for this swtch. Just will be a Com lay extra a L1 swihch and a L2 go. Aspect Two way authentic switching Here are why by step wirkng on how to from text to sex up a wiiring way determination happening or to motivation a towering swotch way light special to a two way system, this is very fun on parents etc. As with the one way stick, the reason cable from the weighing several contains two thousands, a permanent live and a used live. That is the back of the road switch that will stiff the circuit 2 way, once again the lone parent has been put back for wastage. Fig 2 below partners how we achieve this time. Two-way switching 3 lasting control, old services Here we a have a only Fig 1 which inwards tumblr naughty in public markedly to visualise how this slip people. If your request has the old staggering helps see: Fig 3:. wto

Author: Nikokasa

2 thoughts on “Wiring a two way switch

  1. Now consider Fig 2 again, the live feed leaves the consumer unit fuse board and runs round the house to the downstairs switch, it then runs upstairs to the second switch, up through the light. The electricity flows from the hot wire black through the 2-way switch shown in off position and then to the light and returns through the neutral wire white.

  2. You now have a light that can be switched on or off from 2 different locations. This arrangement is often found in stairways, with one switch upstairs and one switch downstairs or in long hallways with a switch at either end.

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