so in this video presentation we're continuing on the series of videos for learners new to the
electrical department Tresham College previously Joe we looked at we looked at the ten tools didn't
we the make up our basic toolkit so that's been covered really nicely by Gaz and today we're gonna
have a little bit of a chat about basic wiring accessories the student can expect to use here
at the college and also in their early working days out in the workplace and we're likely to
be touching on these very soon after coming into college after health and safety and so
probably within the first two or three weeks we'll be actually working with these accessories yeah so
what we got in front of us then Gaz so Joe we've got a one gang one way switch here can you explain
to me what that means yeah absolutely this is a common switch most people will be familiar with
this you will have seen it all over your home but what we're gonna do is we're just going to break
down that expression you just said Gaz one gang one way so let's first of all just tackle the
one gang part of it what that means is you've got one switch in the middle of the plate by itself
bit later on we'll look at a two gang switch and you'll see the difference there but that's what we
mean by one gang basically we mean one switch in the middle of the plate there now in order
to address the one way part of the switch we turn this around and look at the back now when we look
at the back here you can see there's three holes in the back of the plate one of these holes in a
one way switch is completely empty it's blank it doesn't have anything in there at all the reason
for that will become clear when we look at what our two way switch is we've got two terminals that
actually have something in them and this is where we would terminate our conductors coming into the
accessory the terminals are marked up common and one way you may also find on the back of a switch
this may be marked up as common and L1 means the same thing and all we have here is two conductors
one going in the top one going in the bottom and the switch will then break that conductor so what
we can see there is we've got a one gang one way switch so we've changed accessory Joe but it looks
very similar to the ones shown previously what they got this time so we've changed two things
about the switch here Gaz what we've done is we moved on from looking at perhaps a budget range
switch where it was all very square and angular and what we're looking at now is something that's
a little bit more visually pleasing so this is a click switch it's been manufactured by
the company click and it's from their mode range they're very kindly donated lots of accessories
to us here at Tresham College so we thank them again for that very much and when you look at
this you can see it's got more rounded corners the switch is slightly curved on the front face there
which looks nicer we've also got that you can't see here we've got inserts that go into over the
screw covers to make those look quite nice as well and if we turn it sideways on you can see we've
got a nice chamfer on the top and the bottom of the switch so it's a more aesthetically pleasing
switch so that's the visual side of things but when we start to look at the functional side of
things that's where we've changed even more so looking at the front of the switch you can see
this is still a one gang switch because we've just got one switch in the middle of the plate
there but when we turn it around we can see that something's changed so what we've got on the back
here indicates that this is a two way switch so we've got three terminals now and all of those
terminals have actually got connections inside them that we can make so they labeled up common
I'll put the top we've got L1 down at the bottom here which would be the equivalent of the one way
terminal on the previous switch that we looked at but now we've got a third terminal in this
is marked up L2 now we're not going to get too deeply in this video into what those mean and how
to a switching works for that please click on the eye in the top corner of the video to take you to
another video that will explain how to a switching works but at this stage we just wanna be able to
recognize that if we turn a switch around and we can see that there's three terminals each terminal
with a connection inside it that makes this into a two way switch so you can see if we go back to
the front we've got a one gang 2 way switch so if we change to a third switch Joe is just the
same switch well from the front again it looks exactly the same doesn't it it looks like the same
switch that we looked at previously but now what we've got this is a one gang switch so hopefully
that's very clear now we've got one switch in the middle of the plate which makes it one gang
but around the back where the magic happens you can see that we've produced another change so now
we've gone from having three terminals to having four terminals now having four terminals on the
back of this one gangs' which indicates that this is what we call an intermediate switch now again
we're not gonna get into lots of depth about how intermediate switching works for that please see
another video but actually just being able to identify that on the back here we've got four
terminals in this case we've got two terminals marked L1 two terminals marked L2 that makes this
into an intermediate switch so now what we've got again turn it around and look at the front we've
got a one gang intermediate switch so hopefully you can recognize those switches now so we change
which is once again Joe can you explain what we've got in front of assist on yeah of course
so what we've got here now is we've added switches onto the place so we've got two separate switches
here on the left here we've got a two gang switch so now you can see that we've got two switches on
the plate so that's what makes it into a two gang switch the gang relates to the number of switches
basically here we've got three switches in the middle of the front plate so that gives us a
three gang switch so that's what we're looking at there now it's quite interesting if we flip
this round Gary you can see on the back that for both of these switches we've got three terminals
so I know what you're thinking those watching at home you thinking well they're obviously both two
way switches and if you recognize that well done but you may also be thinking well what if I need
to gang switches but each one to be one way well the answer is you can't actually buy that kind
of arrangement without going to some kind of specialized manufacturing system but the good
news is that if you've got a two way switch you can use that two way switch as a one way switch
as well so it's compatible in that direction so actually what we've got here is a two gang 2 way
switch but we could if we wanted to use one of these or both of these as a one way switch so
Joe thanks for explaining about the light switches to us I can see we've got a light fitting in front
of us what we got this time yeah so what we've got here Gaz is we've got what we call a ceiling rose
with a pendant attached to it so the ceiling rose is the base this is the part that is it up on the
ceiling and then the flex hangs down and that's what why we call it a pendant you'll notice on
here we've got what's called a straight skirt on the base there which covers over the part where we
connect the lamp up and this would be seen most commonly in domestic installations again viewer
you may have seen this in your your own home in your lounge or your bedroom or somewhere like
that and it's just a very basic light fitting so this bit goes onto the ceiling this bit dangles
down and you put your lamp in the end there so we change light fitting from the ceiling rose
pendant what we've got this time Joe so what we've got now is ceiling rose but as you can see what's
changed is we've now got a permanently connected lamp holder so this is no longer hanging down off
of flex this is what we refer to as a batten lamp holder another thing you might notice that it's
quite different about this is this skirt at the top is no longer straight and narrow as it was
before its flared out slightly and this is what is referred to you may hear electricians calling
this on-site a home office skirt you're likely to find this type of fitting anyway you don't want a
pendant hanging down perhaps where looks are not important you may see these in downstairs toilets
garages sheds that kind of thing and this is what we refer to as a batten lamp holder so Joe run to
a final lighting point that will install in the workshop so what we've got this time so again
you can see a slight difference from before once again we've not got a flex so this isn't a pendant
but we've lost the ceiling rose we don't have that large base on the bottom of here where we
can make electrical connections we've got a very small base so this is a batten lamp holder with
a straight skirt but the difference is is that this particular fitting is designed to be mounted
through these holes here and here onto a conduit box and so this would be found in industrial
locations most likely so what we've got going on here there's just three connections two of which
go straight through to the front and there would be a box a conduit box that it would mount on to
where all the terminations would be connected so Jo is run through the lighting accessories
that all our learners will be using at Tresham College it's immensely important that all students
can identify and name these accessories and it's possible that we will be were came with them from
week 2 onwards let's look at some other electrical accessories were going to be using in the workshop
so we've moved on from lighting accessories and we're now onto sockets Joe can you explain what
we've got in front of assist on yeah absolutely Gaz so now we've got two sockets in front of us
here this one is what we call a one gang socket so we've got one socket outlet on the front of the
plate here we've got a two gang socket so we've got two socket outlets on the front of the plate
another way just to determine what these are is that both of these sockets have got switches on
them which will turn the electricity on and off to the socket outlet so this is a one gang switched
socket outlet and this is a two gang switched socket outlet so that's how we refer to them
technically if we turn the one gang switch socket outlet over and have a quick look at the back you
can see on the back here we've got three terminals and they're marked up in the following way we've
got one terminal marked L so that's where we terminate our line conductors we've got another
terminal marked N so that's where we terminate our neutral conductors and then we've got a terminal
marked E and this terminal is where we connect our CPC's our circuit protective conductors which
you'll learn a little bit more about in a future video looking at the back of the two gangs switch
socket outlet you can see we've now got four terminals now the reason for that is once again
we've got one terminal marked L where we terminate our line conductors one terminal marked N where we
terminate our neutral conductors and now we've got two terminals marked E which is where we're going
to terminate our CPC's or circuit protective conductors now the reason we've got two is a
little bit complex for this video but that will be addressed in the future so we've moved on to
consumer units then Joe can you explain what we've got in front of assist on yeah absolutely so this
is the most common consumer unit that you'll be fitting during your time here at Truman college
it's what we call a two way consumer unit now in this instance the two-way indicates that there
is space to fit two circuit breakers in here to go out and feed two different circuits so that's what
we mean by a two way consumer unit we've also just a quick note on cable support you'll notice in the
top of the consumer unit we've got two glands this one would be for supporting an outgoing cable to a
circuit this one is to support the incoming cables that feed the consumer unit and we'll explain why
they're important in a future video and to the left of your picture here we've got four circuit
breakers you'll notice they are the same brand and they are designed to go inside here so this
is all Crabtree it's never a good idea to mix and match your circuit breakers in different consumer
units you want them all to be manufactured by the same people and you can see here we've got
the common sizes of circuit breaker that we'll be using while we're here at the college so we've got
here a 6 amp circuit breaker a 16 amp circuit breaker 20 amps and 32 amps so there's lots of
other circuit breaker sizes available but those are the four common ones that you'll use during
your time here at the college so if I look at some of the accessories you're going to be fitting in
the workshop can you talk us through these boxes for its Joe please yeah absolutely so these back
boxes are very often referred to as pattresses so you may hear that while you're out and about on
site and we've got three different sorts here so again you'll notice we've got two that are
similar outline size but thicker and one that is twice as big the reason for that is what we've
got here is we've got a back box or a pattress that is designed to accommodate a switch okay so
that just sits on there like that so on here you could potentially fit a one gang two gang or three
gangs which obviously you've got to think about the amount of room you've got in the back there
if you've got a three gang switch you might draw to terminate some of the conductor's inside there
but that's designed to sit on there you'll notice it's shallower so it's a 16 mil depth box there
as opposed to the next size that we're going to look at which is a 25 mil box so this box here is
25 mil thick it's deeper than that box and that's really designed to accommodate a one gang socket
that just sits on there nicely as you can see if you try and mount that inside there you've got
zero room in the back for you terminations and conductors whereas here you've got a fighting
chance of being able to terminate that nice and neatly so again one going boxes of different
depths 16 mil and 25 mil and then at the back here we've got a 25 mil box but this is designed to
accommodate a two gang socket like that so thanks for that Joe running through the accessories we're
going to be using very early on and hopefully forever as we move into the electrical industry
after our time Tresham college yeah absolutely any student that comes to learn here at Tresham
college can be expecting to install and use these exact accessories that we've been through again
we'd like to say thank you very much to Click for their kind donation of loads of accessories that
they've given to us that's a massive help for a poor FE College moving forward and also we'd
like to continue to thank Crabtree for their continued support that they give us regarding
their star breaker range well we're going to try and end this properly this time laughter we all
stumble around and across it which hopefully gonna crush it so we hope this video has been some help