proper exciting paul meenan just turned up
i'm good how are you
yeah fun times ahead oh it's hard drive we've got the ideas isn't it oh we've got i guess paul
meenan arrived hello i'm tired yeah what time do you leave five or something ridiculous yeah
what's happening where did you go
here we go we're on it end it with the song
oh knackered the days
ah don't think you said a joke
he's tired he is tired yeah not as tall as i am indeed
so ready as i'll ever be yeah you're gonna love this and yeah you love all this
oh dear but different from last time we were here because it was just me and you yeah
so how long have you been an e5 member is the question i normally ask at this point in the
walk down so when i've got a voice yeah yeah do you know do you know the block that set it up
i've heard of him what's his name no idea paul mainland i think his name is great yeah
so paul we're going to go in the workshop and hopefully there'll be one or two learners in
there that'll be quite pleased to see you so let's go and have a look what's happening
paul meaning
how are we i didn't expect this number you lot
wow blimey so hopefully we'll have a fun day today hopefully i won't bore you too much with loads of
technobabble but should we crack on the other day yep so we're going to split ourselves out uh some
of us are going to stay in the workshop with me for paul for the first 15 20 minutes introduce
uh the white-based learners and then he's going to join level twos with his rig that will show
the effect of dc in an rcd something we've talked about quite a lot in the last month
and then the rest of us are gonna get interjected throughout the day um and that's what's gonna
happen and also we've got another guest as well that'll be floating around that we'll
get a chance to talk to as well so let's break out into our groups now then folks so interesting
so you can put an ip rated trunk here which you can get by the way
um where am i from well does anybody know where these
two people are from leslie phillips and adele greatest place in the world tottenham
the most diverse community in the uk i grew up there it was a brilliant place to grow up in
and what you'll also do then you'll do one time and you'll make sure it trips because jobs are
good and it should trip out in 300 milliseconds oh no there you go it's not dripped out what's
happened there well what i've actually done is i've just injected 250 milliamps of dc current
now i don't know that because i've just done my one times test so i'm thinking well it's a mystery
how do i how do i solve the mystery i know what i'll do there's a problem with the rcd i'll push
the trip button that's what i'll do so i'll push the trip bar no no that's not working so okay so
the trip button does not work it's saturated with dc so the devices themselves if you look at the
ideal or n of a 30 milliamp rcd if this device was the basic device for a 30 milliamp idea
the number of windings would be proportionate to the current that was needed to trip it if you are
saturating that device you're effectively stunning or delaying the performance of the balance of the
electromagnetic field henceforth it will trip but you need a huge current as we saw in the
video we did a ramp test on a 30 milliamp rcd and it took 195 milliamps to take the device out