so in this video presentation we're going to look at adding an intermediate switch to
our circuit our original circuit consisted of a two way switch and a two way switch controlling
a lighting point and now we've added in an intermediate switch to give us three positions
of which we can turn on and off the lighting point so we're going to look at how we're going
to wire that up and the connections in the back of the intermediate switch in this presentation
as discussed in the previous presentations as we're wiring in pvc singles we have the ability
to take our conductors exactly where we need them to go so let's start with the blue neutral we're
going to take out the neutral bar in the consumer unit and take it directly to the straight skirted
batten lamp holder where we don't matter where we connect it as we've discussed before
as it has a bayonet cap lamp going into it so it's a bayonet cap lamp holder and it
won't matter which side we connect our neutral and which side we connect our switching line conductor
so from the consumer unit the blue neutral goes directly to the lighting point itself the cpc in
the consumer unit connected here in the earth bar green and yellow conductor leaves there and goes
directly to switching point number one which is a two way switch we've connected it into a
insure maintenance free connector and we know that Wago make the same style design cpc then goes
to the middle switch which is our intermediate switch and again is connected into a maintenance
free connector from this switch we've gone to our final switch which is our two way switch
and again connected it into a maintenance free connector and then our cpc goes up to our straight
skirted batten lamp holder and is terminated into the back connection we took that route for
our cpcs because we wanted to limit the number of cpcs actually our lighting point itself so we've
gone consumer unit to two way switch from two way switch to intermediate switch from intermediate
switch to the final two way switch and then we're taking our cpc up to our straight-skirted batten
lamp holder fully insulated system plastic conduit and plastic switches and boxes
so cpc as we've discussed previously is there in case we change it for an exposed conductive part
in other words we fit a metallic light switch or metallic box onto the light and circuit itself
the line connection starts at the six amp circuit breaker and our line connection similar to what we
did in two way our line connection comes from the consumer unit and goes directly into the common
of the switch the first switch being a two way switch again remember we said it could
be either way up i've just shown it this way around so it goes straight into the common
so the line connection from the circuit breaker goes into the common of the first two way switch
two strappers from L1 and L2 come out across and down into our intermediate switch
sometimes there's some mild confusion with my learners because the two
strappers from the intermediate sorry to the intermediate switch from this two way switch
either go in the top two connections or the bottom two connections but not across the side
however the drawing hopefully that appears here now does show those two strappers come in and it
looks like they're going in the side the reason being the drawing hopefully which is shown here
shows the switch actually rotated into that position to make it an easier wiring diagram
to look at so when i turn over my switch i've got the two connections running in here
two strappers and two strappers running out there so it is correct from the point of view
that we would have to rotate that switch round two strappers from the first two way switch either go
in the top two terminations or into the bottom two terminations but not across the side we'll make
a little bit clearer in the classroom as well so just to recap them line goes straight into common
the first set of strappers from L1 and L2 come out down and into either the top two connections
of our intermediate switch or the bottom two it doesn't matter which way round they are as long
as they go from L1 and L2 into either the top set or the bottom set then another set of strappers
either from the top set or the bottom set come out round and down and are connected into L1 and L2 of
our second two way switch and then from common as before from common we come up to a lighting point
and connect it next to the neutral straight skirted bayonet cap lamp holder in order to have
control so let's recap the line conductor starts at the top of the six amp breaker goes down to the
first two way switch it's connected in common two strappers come out from the two-way switch
down to the intermediate switch and either connecting the top two or the bottom two terminals
two more strappers come out of the intermediate switch top two or bottom two terminals
come out down and into our final two way switch where they're connected now L1 and L2 from common
we go back to the lighting point itself in order to turn it on we can have as many intermediate
switches as we like as long as we've got a two way and a two way switch positioned so as many
of these as we like breaking those strappers again we'll discuss that in the classroom.