let's do one of them in this video so i'll bring this one in before we get more complicated
and this goes back to our one-way lighting circuit we said we came from the consumer unit into the
common of our switch our one-way switch out of L1 to our lamp and we brought the neutral straight
from the consumer unit to the lamp itself so what i've got here wiring diagram shows a consumer unit
this is a box in the conduit this is a t-box comes down to a switch which is a one-way switch with
common L1 and i've got a lighting point here with just three terminals switching line neutral and
cpc remember there will be no looping terminal in this system so hopefully we can apply the
knowledge from this one in order to wire this one and then we'll develop it in another video where
we look at two-way two-way intermediate and adding extra lights in different rooms as well so first
of all gotta work out where our line connections coming out of here are neutral in our cpc so this
one here is our cpc this one here will be our neutral and we've got these here showing our two
over current protection devices well we've only got one circuit coming out here so we're going to
come out of the first circuit breaker which will be our six amp one closest to our main switch
and we said the line conductor goes directly to the common of our first
switch so let's see that again a line conductor goes directly to the common of our first switch
so let's put that one in so we come out of here and we're going to bring that through our system
through our conduit system we said it's going to go directly into the common of the first switch
next neutral we said the neutral went from the consumer unit directly to the light so let's
do that so from the consumer unit directly to the light so out of our neutral connection here
i'm sure you'll make a really neat job of doing this compared to my freehand effort
and that comes straight into here and goes into the neutral of our lighting point itself
we need a switching line from here going directly to the light
so from L1 directly to our light itself and then we can look at putting our cpcs in as well
so we come out of L1 and i'm going to bring that through the conduit system in singles
and i'm going to bring it into my switching line conductor of my lamp there's only three
terminals up here now the cpc so the cpc is going to start in the consumer unit it'll either go to
the switch first and then the light and this way you have to use your imagination a bit if this
switch drop here was eight meters and that was one meter which route would you take for the cpc
well i'd bring my cpc up to the light point there and then drop it back down there what i wouldn't
do is bring it all the way down here eight meters all the way back up eight meters and go across one
meter so you can see why the cpcs it's important that we take a logical route in order that we wire
them down and use the minimum amount of cable well they look on this drawing as if they're
a very similar distance apart so you're probably logically going to bring a cpc down to the switch
and back again often in a conduit system the actual switches themselves can be metallic
and obviously the cpc will be needed because that metallic switch is an exposed conductive part
we also use our plastic switches as well in this conduit system so we've used plastic
switches as well of which there will need to be a cpc connection in the back of the switch box
just depends what you're looking at when you're doing it but let's bring the cpc round anyhow
like so so we're going to bring our cpc through our conduit system and connect it into here and
now you've got to make a choice of coming back out again and then you've got to bring one that comes
up to the lighting point itself i'd like to think you're going to make a lot better effort of
cables crossing over etcetera because you'll plan your route as you go through
in order to make it nice and logical but that gives us a wiring diagram when we actually used
the circuit diagram to help us so let's just recap that then we used neutral one cpc one
and the breaker number one in our consumer unit and oh look i've gor an s on the end look somebody
needs us pick this up look consumers unit consumer unit and we need to come through our system itself
so we bring our line conductor through down to our switch into the common we have our switching line
from L1 up to our lighting point our neutral goes directly from our consumer unit to our lighting
point our cpc takes a logical route around the system in order that gets to every point
and this system is great from the point of view you only take cables exactly where you need them
so because we can pull these cables through the conduit system and take it directly to
the point in which we need it we don't end up having cables at any point a switch or a light
that aren't required hence no looping terminal up here because our permanent supply went to
our switch our switching line came back in order to complete this simple one-way lighting circuit
as we move on we're going to look at some other stuff so we'll end up looking at things like this
we'll end up looking at a more complicated two-way intermediate with two lamps as a circuit diagram
we can apply it then as a wiring diagram we will also have this system here where i can
have say light one controlled by switch one wire it then have light two controlled by switch two
light three controlled by switch three and we can see how we can bring the system through without
having to return to the consumer unit every time to pick up our permanent line we can also make
these two-way two-way and intermediate two-way two lights etcetera is plenty of opportunities
to increase the the knowledge through the wiring diagrams that we can produce in later videos
in this one i just wanted to introduce the flexibility of using pvc singles as we've
done here and we've got some circuit diagrams that can be used as wiring diagrams and we
saw that with the one-way switch we also have introduced the two-way intermediate as well as
the two-way lighting circuit using this conduit loop in method a method that means that we take
our conductors only to the positions in which we need them before we go to our next area hopefully
you're using a ruler if you've downloaded the document below and hopefully you're making a more
logical pattern around because this will help you in the workshop wire your conduit lighting
systems and we'll continue on in other videos but as always i hope this video has been some help