during my series of videos using the two plate method i've been asked the question how do i
continue the system on if you look at my videos on the three plate loop in method we know that
we use the terminals within the actual ceiling rose to carry it on to another room however we
can't do it here can we because this line conductor here at the lighting point often
things like LED down lights is not a permanent line but is a switching line a neutral and a CPC
and if i was to take them into the next room the only way those lights would work is if the room in
this one was on you'd have control of the lights in a different room so obviously it doesn't work
like the three plate method we're looking at the two plate method so we need to find our permanent
line neutral and CPC connection in order to take it from the room we're currently in to the next
room and continue on the system again and in all of the two plate videos this one being the one way
this one being the two way and then obviously the two way and intermediate system we've always taken
the feed to the switch so we took it there to the switch we took it the feed to the switch in the
two way method and also in the one way method so when we want to continue this system on we need to
go to the switch in order to make our connections that will go into the next room so let's have a
look at that we've got a cable here which is our one millimetre squared PVC PVC twin and CPC cable
often called on site twin and earth and we would need to take one of these with our permanent line
connection our circuit protective conductor and our neutral from the switch and take it into the
next room so let's simply do that on this one way circuit first then we'll look at it at two way
and two way intermediate so the cable coming in here which is our one millimetre squared
twin and CPC cable brings in our CPC our neutral and our permanent line connection
and if we follow it through in the back of the switch it is actually in the common terminal
so it's in there in the common terminal of that switch the permanent line we've drawn some sort
of little square here with a black pen we're simulating there a connection such as a Wago
an ideal industries standard connector block or butt or through crimp
it's it's more beneficial not to be using this type now because obviously we can add or
change these simply for one that can take more conductors so at the minute we've only got two
cables in here which are the neutral connections so we could simply swap that in for a three
conductor connector from Wago or likewise a three conductor connector from ideal industries neutral
permanent line CPC in the actual back terminal of the box if it's a plastic box or a metal
box etcetera so we've got to find where the CPC's have been secured so what we do then is we take a
cable from here picking up the connection for the neutral the terminal there which is our permanent
live this case in the common and our CPC and just take our cable to the next room remember
the route that this cable takes may be under floors buried in walls etc we're just currently
looking at the connections within the switch in order to take a cable to the next room in
order to continue the system on so this cable here would come out you'd come out the same connector
let's imagine we're coming up this way we'd come out with our neutral connection we'd need
to bring one out of a common we'd bring one out of the common and out to our next room and we'd
bring one out of our CPC so we'd bring one out of here so in order to go off to the next room
now some of my drawings i have been striking these with a yellow it looks like i didn't do
it on this one but yeah my students like to do that so what we do is we go to the switch when
we're using the two plate method we look within the switch for the connection for the neutral
we make our neutral connection we pick up the CPC from wherever they've been terminated
and we look for the permanent line in this case connected in the common of the switch
and we go off to the next room with this cable in our case our one millimetre squared twin and
earth cable goes to our next room when that cable comes into the next room we can either
repeat the process that we've got here take the feed to the switch and do a one way circuit
two way we'll look at in a minute or two way intermediate whatever we've got in that system
so we don't go here anymore because we know that this is only a switching line unlike the
three plate method on the channel there's loads of videos on it this is the two plate method
so in order to pick the supply up to go to the next room we have to go into the switch so let's
have a look at that on the two way one i'll bring that one in next so i'll get it sort of positioned
in the right place where we start okay so here we go we've got two plate method using uh two
way switching exactly the same as we just looked at up here in the actual light fitting itself we
only have a switching line conductor a CPC and a neutral so if we took this to another room there's
an issue obviously because of the switching line we come into the switch itself and see now we're
getting a little bit crowded in here now so what tends to happen on site with the two plate method
is the box that either is chased in the wall or positioned in the wall is normally deeper now
if it's a dry line wall they often use these style of boxes okay in order to fit those in you can see
from our work in the workshop that is considerably deeper than our normal lighting box well it works
for two ways then it gives us more space in here for the two plate method which is great which
means that we don't have any issues with crushing cables and obviously that's a standard depth as
well for these boxes you can't get them shallower than this so it's a bit of a bonus to us so when
we're using the two plate method and so we've got a dry line or stud wall the box that's been placed
in the wall is nice and deep which allows for more connections especially because we're using the two
plate method and we're going to introduce another cable that goes to another room which makes more
connections so that means that if you were maybe fitting a metal box you'd fit one like this which
is often used for say socket outlets which is deeper than the standard box for a lighting
circuit again especially if you know using the two plate method you could go one stage further
and obviously go for an even deeper box that's often used for things like cooker outlets okay so
you can go through the more room you've got the easier the connections will be to make in here
using the two plate method and again it could be that you're using a twin box you have a multi gang
might be four switches in there again that type of box gives you plenty of room for those connections
so here we go we've got our circuit here with a two way using the two plate method we know we're
going to need to pick up our connections from inside the switch if we want to take a cable
through to another room we need a neutral a permanent line and a CPC hopefully we can
see that we've got our connection here drawn in maybe with uh the Wago connector we've got here
or Wago however we want to say it we're going to take a neutral from here a CPC from here but
of course now we've got to be careful to work out which one is our permanent line connection
with my um two way system i always like to bring the brown coming in connects to the brown of
the three core going out but this is where you might need a little bit of investigation in here
neutrals are obvious it will be in some form of connection whichever form it comes in
the CPC will be obvious but to pick up the permanent line you've just got to be careful
to see what the system is using in order to pick up the permanent line so that's our permanent line
our neutral and our CPC and a one milometers squared cable for me might be 1.5 on site needs
to go from this switch into the next room bringing the neutral the line and the CPC so let's do that
so we simply know our neutral is coming out of there remember it's going to go through the fabric
of the building i've shot it downwards it might be going up through the wall under floors etc
just easier to show it going down we've got our permanent line connection which is actually here
which comes out and obviously goes off to the next room and our CPC connection
down like so our CPC connection goes off into the next room as well so we've used a little bit of
investigational skills there to work out which is the permanent line within that switch it's neutral
obviously in the connector we've got our CPC possibly in the back of the box etc in
its CPC terminal and then we've got to pick up our permanent line in order that we can take the cable
through to the next room and start again line neutral and CPC take the cable possibly down to
the switch repeat the two plate method in the next room i hope this is becoming a little clearer as
we go there are other videos on the channel where i physically make these connections and talk about
what's going on inside the one way two way and intermediate switch using the two plate method
this is the drawings that accompany those videos there's also a link in the description for all my
drawings um i've done on the channel on lighting circuits feel free to download those and make your
own wiring diagrams up as well and remember as i was saying my students should be using a ruler
Gaz is doing this upside down and he's doing it freehand as well let's have a look at the next one
which is our two way intermediate hopefully we're getting a feel for it now of where we're picking
up the actual permanent connections from within each of these accessories let's bring this one
in and position it like just there okay so we've got oh it gets more and more complicated as we
go we've got two way and intermediate again it's the two plate method so we've brought the supply
into the actual switch we know up here we've got a neutral a CPC and a switching line that's fine
if we want to add extra LED down lights so this video here was created from the original two way
intermediate to show you how you can introduce more and more down lights in a circuit by simply
bringing the switching line neutral CPC to the light fitting to the next light fitting and so on
and making the appropriate connections again check out that video if you haven't already seen it
so we're back to how do we pick up from the three switches we've got now the permanent line neutral
and CPC well this one here contains the connector the connector that will have our neutral in this
is the switch that we're concentrating on in order to make our connections these ones here
won't give us the terminations that we need in order to carry it on so we're going to need the
neutral the CPC and again it's it's clever that my system i always use the permanent line on to brown
so if i open that switch up and i'd wired it i'd know that that is the permanent line connection
remember on site there might be some investigation into the permanent line
clearly you can see in some form of connector will be the neutral we can clearly see the CPC
but we'll investigate again before introducing our cable which will bring permanent line neutral and
CPC from this switch and go into another room and continue the system on let's add those in
so again let's take a neutral out the block goes into the next room
let's take the CPC out of here and go into the next room again let's put a little bit
yellow on that one just to make it a little clearer remember you'd be using a ruler
or not as a case maybe and then the permanent line connection for me
is going to be here i know that from my system small investigation if you're unsure and we go
off into the next room so we take that cable our one millimetre squared twin and CPC cable
off into the next room permanent line neutral and CPC from the connections in that switch and again
look how crowded that is getting in there so having a deeper box becomes a massive advantage
remember these are only one way switches so uh sorry not one weight one gang switches i apologize
so these are one gang switches so there's only one switch on here here and here whether they be a two
way or an intermediate switch problem starts coming when we introduce two and three gang
switches using the two plate method so we've got three gang switches there's three switches on here
two gang two switches on here all of a sudden we've got more and more cables coming into the box
and obviously using the two plate method helps you at the lighting point could be that this is
for kitchen spots and pelmet light into the lights underneath your kitchen units and an outside light
if we're using the two plate method with a three gang switch it's going to get very crowded and
you can now see the advantage of having a deeper box in order to make those connections the more
time you spend on site working with the two plate method the more comfortable you'll become with it
and the ease of the connections in there okay so it's not difficult it's just like everything the
more times you do it the easier it's going to become so in this video we tried to show you in
our three diagrams we've used using the two plate method that we can extend the circuit into another
room by not coming out of the lighting point but picking the permanent line neutral and CPC up from
the switch whether it be a one one-way switching two-way or two way intermediate switching
and how we can make those connections and as always i hope this video has been some help