so we're going to continue on now we're going to look at uh spaces of supports
well we looked at spacings of supports for pvc steel armored and mineral insulated cable and
that came out in the previous video so you can recap that if you didn't get that lesson
we're now going to do the same in appendix can anyone remember which appendix the fixings was
or cable support success anyone remember the appendix obviously let's go with appendix d
until we think about which one it's in so turn to page 143 of the on-site guide for me
and we're going to be looking at supports this time in conduit so i am looking
at that page just there yeah okay we all got that one have we already made some annotations on it i
think because i think we did look into that one during a previous lesson yeah i've got notes of
mine yeah yeah all got notes are you founded okay so column number one's really important
to us so column number one which is cause some confusion somebody even said on the clipping one
when we did for cable sports of twin earth etc they went i think you've got it wrong guys people
are missing that bottom line out aren't they so the first diameter is in column number one up to
and including which size 16 16. so we can clearly see that's now up to and including yeah 16. so
this is talking about the diameter of conduit i've highlighted the top of the page where it
says it's for conduit yeah just in case i forget when i come back it's actually for
students so if i was fixing a conduit it was 16 mil in diameter and it was plastic
which which other columns am i going to use as well as column number one for plastic under it
but what it doesn't say plastic what does it say it says rigid today and i think last time i just
got us to write the word did i not pvc above it yeah yeah so we can clearly see that that one is
pvc conduit so if i said you had 16 mil conduit horizontally the supports would need to be at
what intervals as a maximum 0.75 and at vertical one one meter so that's the maximum we can go we
can go more frequent we can't go less frequent than those dimensions if i said to you it was
um let's go for 25 millimeter metal conduit what's it looking now like for horizontal
at 1.75 do we all see that up to and including yeah so greater than 16 but up to including 25
is 1.75 and vertically two meters how how is it that we've got now 25 not 16
considerably bigger conduit yet our spacings can now be further apart
yeah so as you look down each of the columns whether you're in metal or plastic etc
as you work down them as we increase the size of the conduit we actually increase the spacings
between our fixings which is not counterintuitive but you're in your own mind oh you'd have to clip
it more often but actually it's self uh supporting it's a little bit more rigid the actual supports
whether they be in the the metal the uh rigid insulate pvc on the last one says pliable what's
what do you mean by the word pliable flexible yeah so often it's called copex on site but copex is
flexible conduit so people will say to you i'm putting a machine in a rotating machine
it's going to vibrate i'm going to bring a piece of copex from the isolator or starter
to the actual machine it's actually going to be in this case playable and i wrote flexible above it
and i think you probably wrote flexible above it as well in your column yeah
yeah but that is what people on site are going to call kopecks okay so it's like they call it
pyro but it's mineral insulated cable et cetera so that's that's really important so we're going
to use that table in a second and you're going to fill that in in your notes let's look at the notes
however below that table d3 there's some really important bits in there for us if you look at um
note b i've highlighted the maximum distance away from a bend or fitting that i can have my support
so it's got to be within 300 mil okay so when you put a bend in or socket box switch etc you should
have a a saddle securely fixing it within 300 ml and i've highlighted it so i've highlighted
that if you haven't done it already and then c it goes back to i think what ed said to me earlier on
what was the diameter for the uh sorry the factor for the diameter uh two and a half times diameter
and i don't make this stuff up because again it's in the on-site guide so again to highlight
that as well right what when you do now is on your page nine can you put the horizontal and vertical
um spacings for the maximum distance for these supports if it was metal conduit
so i want 16 20 25 and 32 horizontally and vertically for metal conduit please
okay we'll dump down so you want to go first if i had metal conduit and it was 16 millimeter
diameter conduit what is this horizontal and vertical fixings maximum distance between supports
please uh 0.75 and 1.0 yep so one meter well done if we go next for uh john if i had a 20 mil
conduit it's metal vertical and horizontal maximum distance between supports okay horizontal 1.75
yes and vertical to me yeah brilliant and ed if you jump down to 25 mil metal conduit for me
uh the same 1.75 and two meters yeah yeah it is yeah both of those encompassed in the same line
and then if we go for tim what if we had a 32 mil conduit uh it's two meters uh horizontal and two
point two five holes vertical yeah brilliant so we've used uh columns one two and three in
there in order to work it out for metal only we could have gone on and looked at um plastic and
flexible if we wanted to as well so we didn't okay the notes only required us to do that so brilliant
well done for that so that's goes back to a previous lesson where we looked at the supports of
mineral armored and twinning cpc cables now we've now worked out what the supports are for maximum
distances now for conduits are we happy that we could do that again if we were working towards our
domestic installer and we had a side visit with us from the NIC Napit stroma or from us that we
wouldn't trip up and have a saddle maybe further than 300 mil from a bend etcetera yeah yeah yeah
all right okay good so we wouldn't have emphasized that as much perhaps in the classroom but your
next course which will be the next when you start i would imagine will be the domestic installer