In this video presentation we are going to install a dry lined box into a dry lined wall
often call a stud or hollow petition wall out on site these are skills required at EAL
level 2 Electrical Diploma simply can either cut in a 2 gang box as the one that's installed
at the moment or a one gang box under the instruction of your tutor we're going to be
using old school old fashioned path saw it doesn't mean that our college hasn't got the
ability to use a multi-tool however the assessment requires us to use a pad saw and this video
will look at the skills required in order to use a pad saw to cut the box into a dry
lined wall also during this assessment we're going to need to make sure we wear a dust
mask pair of safety goggles and a pair of gloves in order that we comply with the requirements
of the EAL assessment we're going to bring the camera in nice and close and I'm going
to show you how I mark out and ensure that no studs are present behind the wall it's
easy to see at the minute that we have other fixtures such as wood and metal supports holding
the frame up however in the real world when faced with just a plaster wall you're unaware
of where those studs are and we'll look at a technique to ensure that we don't hit those
studs let's bring the camera in and have a look we're going to do next so for this demonstration
I'm just going to cut in a one gang dry lined box ok the two gangs above it wouldn't matter
exactly the same technique whichever will install it and I'd like to leave at least
50 mil gap between the boxes of which we're cutting into our wall so if I position it
on like so okay and I'm just going to draw around that box hopefully I've got it reasonably
level and I'm just going to draw around that box using my permanent pen
you come around hopefully the other box like so it's all ready for the next stage so with
the outline of my box now marked out onto my wall it's not just the case of now rapidly
going in with the pad saw and cutting out this shape we don't know if there's any timber
or metal frames behind here okay so we need to prove that I'm going to take my bradle
and I'm just gonna punch a few little holes in there if I go for the corner I go for the
other corner take the corners out so-so and why this case bradle goes all the way in we're
in a good position and I'm gonna go in the centre as well so by confirming that my bradle
goes all the way and I know in these areas here there is no wood or metal stud behind
it however the flaps on the boxes themselves actually protrude out in order to grasp onto
the plaster board in order to hold the box in position so it could be that there is a
metal wood stud here and metal or wood stud here so therefore the flaps wouldn't open
out on one side or both and likely to be that narrow but on one side so just to confirm
that I take my bradle and I push it in to the side and push it in to this side meaning
there's two very small holes left for the customer that's not a problem he if I was
to cut this out and find it was adjacent to a piece of wood or metal stud here I wouldn't
actually be able to fit my box so two small holes will not need much redecoration compared
to cutting out a hole and finding that I can actually install the side flaps because there
is actually a stud in the way we're ready to use the pad saw next so I've got my PPE
on and I'm now ready to cut out the hole with my pad saw so I'm gonna run it round just
on the outside of the line all the way around so in order that my box will be nice and secure
inside the cut hole however if I was to come slightly on the inside what I often find is
that the box won't go in and I'm having to trim the inner edge on-site I've used a knife
before usually a Stanley knife rather than this style of fixed blade knife just to run
round the line as well when my wall is painted so in order to stop the paint chip in a way
I've also run round with a knife there's no need and I'm not requiring you to do this
at college so it's pad saw next I'm going to try and stay out the way as best I can
as I cut round I'm just going to jam it into the first hole so I've made a little hole
there so I'm just going to jam my pad saw in and I'm going to cut round the outside
of the marked line of the actual box itself
so now there's the moment of truth oh just up in my two flaps into the inside of the
box itself I pushed my box into position it fits in there nice and snugly and then just
pop my flaps in pull them forward pull them forward and I'm ready there for an electrical
accessory I hope this video has spent some help
you