so in this presentation we're going to look at making the final connections for our lighting
circuit inside the two-way distribution board we can identify the line neutral and CPC conductors
a circuit number one nearest the main switch there is no secondary circuit in here we're also going
to terminate the conductor's and tighten them up with our torque screwdriver to the required Newton
meters of torque for both the circuit breaker and the neutral and earth bars let's see how
we're going to identify those conductors and how we can address them neatly within the consumer
unit in order there's enough spare within there in case termination becomes damaged or the consumer
needs changed in the future and our connecting points I'm not quite in the same place so the
minute we've got the earth bar on the left-hand side neutral bar on the right hand side in the
future the board may be upgraded maybe to a larger distribution board we want to make sure we leave
enough cable inside the consumer unit that we can reposition them in the future so my conductors are
ready for termination the conductors are longer than the consumer unit again so we've got plenty
of cable to work with there and I've identified at the moment one neutral with a number one and
my circuit protective conductor with a number one and now when we take a identifying tag and
roll it over the line conducted also identifies number one circuit breaker position next to the
main RCCB is circuit number one the one next that one would be circuit number two we identify them
in the event of us needing to remove the circuit when I disconnect the line conductor at the top
of the breaker with number one on I'll be looking in the neutral bar for number one and that's the
earth bar for the circuit protective conducting number one and in order that they can be removed
from the distribution board itself so let's look how we're going to terminate the conductors and
dressing neatly now within the consumer unit so it doesn't matter which order I'm going to
terminate my conductors in but I'm going to use the top termination is number one in the neutral
bar and the top termination in the earth bar for my circuit protective conductor let's start them
with the neutral conductor so as always I need to get it as straight as I possibly can before
us start so I'll run it through my fingers and we're gonna dress it straight down the back okay
it's me a little bit of awkward because I've got to get my head out of the way for the presentation
it's going to sit along the bus bar at the back here which it can't go below in this Crabtree
design so I'm gonna sit it along there along the back and then I'm going to kick it round so it can
be connected into my neutral bar must make sure I can still see the number one a termination point
and I'm gonna cut the conductor's just there and as always we're going to double over our
terminations take our knife score around and remove the outside insulation then I'm going
to double over that termination in order to go into the termination itself those out of the way
as always I've picked the world's worst pair of pliers because I never check okay so let's lay
that flat so I've doubled over my termination I've got my torque screwdriver set to the appropriate
Newton metres of torque for both the neutral and earth bar so in this case it is going to
be at one point seven Newton meters of torque for these so I'll undo the top termination
position one neutral into the connection and hopefully we get it to tighten up correctly
and we're at the appropriate torque setting for the neutral now I can dress it need to
make sure that I can see the number one I want to make a a gentle smooth Bend in the
distribution board remembering my tails will be coming in from the top at some point I've come
down straight I've gone on top of the bus bar at the back here came up and got a nice smooth
Bend I make sure I can see the number one and I've used the top termination for the neutral
I'm gonna go on and do the circuit protective conductor next so next time we do the CPC so
I move to my number one up out of the way again I'm going to come straight down and
I'm going to bring it then across and back into the top termination so it's probably
about there that I've got to cut back to so if I just slide it down and then cut
away hopefully I've got a better length now for the CPC itself some are double the end over first
and terminate it into the top termination on the earth bar and then I'll dress it afterwards nice
smooth Bend again into position and work to the correct torque setting each is the same as the
neutral bar at one point seven Newton meters for this style of distribution board so now you can
pop the CPC back into a similar to position to where the neutral was just use my fingers just
to dress it back a little bit and then back up again and then put a nice smooth bend in
it I'm gonna take a little while to fiddle around and get them straight in there so we'll go with
that at the moment got to make sure we can see our number one which is falling back a little
bit so I'm gonna just bring that back round so take it back again move the number one closer
to the termination position apologise and so we can see it there at termination and then poke
it back in again and dress it and hopefully straight down and then straight back up again
okay I don't have a little fiddle with that before we're going to look at the connection for the line
conductor and fitting the circuit breaker as well I've terminated my circuit protective conductor
to the top of the earth bar I've connected my neutral into the top of the neutral bar and now
it's all about dressing the line conductor which is also identified with the number one so it can
pop round it into the top of the circuit breaker I've shown you in a previous presentation how to
fit Crabtree starbreaker circuit breakers it's for a lighting circuit so it's rated at six amps we're
simulating a domestic dwelling so it's a Type B circuit breaker so I'm going to come down the
back curl it over and into the top like so you cut it back and I need to double it over this time the
Newton meters of torque for the circuit breaker is different to that of the neutral and earth bar and
I've set my torque screw drive to two point three Newton meters of torque doubled my termination
over as we always do then my six amp type B circuit breaker for a domestic dwelling and pop
it into position onto the din rail and hopefully it finds and locates itself into position and
that's ready for the final termination of the line conductor into the top of the circuit breaker and
then tightening up with a torque screwdriver so I'm ready to drop my line connection into
the top of the six amp circuit breaker again in with the torque screwdriver making sure a screw
to the copper and we get it to the required torque setting okay we're up to the required torque and
I can see the number one I need to just play around now to make sure that these come down
straight and up and over straight and look super neat but for all intents and purposes I've made
the final connections in my distribution board labels in one neutral number one my line number
one my circuit projective conductor number one it means that when I go to test this circuit board
was full of say ten circuits and I wanted to test for the first test which we're going to look at
in the next presentation for continuity of CPC and priority of a lighting circuit I can easily remove
the line conductor number one and connect to the circuit protective conductor number one okay so
they're the final connections for the light in circuit in 1 mm squared cable fused a college at
six amps in a type B circuit break for a domestic dwelling so to recap them we've terminated our
one millimeter squared PVC PVC twin and CPC cable for a lighting circuit into our two-way metal clad
domestic 17th edition amendment three consumer unit or distribution board whatever you'd like
to call it we've got additional protection offered by an RCCB rate of 30 milliamps or less we've got
a circuit breaker type B six amps for our lighting circuit we've identified the neutral the line and
the CPC with number one it's the first circuit it's next to the main RCCB this would be circuit
number two when that circuit breaker is fitted for an additional circuit we use the manufacturers
instructions to get the required Newton meters of torque for both the neutral bar and the earth bar
which are identical at one point seven Newton meters we've got the appropriate torque setting
for the top of a circuit breaker in this case I've set it to two point four Newton meters
of torque and our distribution board is now ready for our first test and the first test we're going
to carry out is continuity of CPC and polarity after that test we're going on to carry out the
insulation resistance test of our one-way lighting circuit I hope this video has been some help
you