RCD trip out

[Simon Hall]

I've been called to a job for a friend as his swimming pool pump keep tripping the RCD, it took me a while to work out how the other electrician had wired it but of what I see, it's a bit of a mess. I'll do my best to explain for the pool I can see 3 MCB's used 1st is a 6A type b in to a time clock in 1.5mm2 then that goes into a contactor then there is a 32A type c in 6mm2 that goes into the contactor then SWA to the pool. Then the last one is a 10A type c in 1.5mm2 that goes to a switch then in SWA to the pool to the plug where the pump plugs into, this is when the RCD trips. I've tested the cables and they are, R1-R2 1.32ohms insulation resistance is all around 100Mohms. Ze is 0.19ohms Zs is 1.21ohms PFC is 1.22KA and the RCD trips within the permitted times, the pump is PSH mini.2 50m 0.37KW. I've never worked with swimming pools before it's a bit out my comfit zone I'm just trying to help a friend. Also the pump works fine for hours when pugged into another RCD protected circuit.

 

[Guest77]

Don't worry guys, I am prepared to help 1st/2nd fix lol

 

[trev]

I shouldn't question what im shown as really i should be shown right but its in my nature to make sure

From that I'm taking it that you're a trainee?

 

[1stfix2ndfix]

Ill wait fir the ban then

 

[Guest77]

Ill wait fir the ban then

You won't get banned, you are not swearing or being aggresive, you are just making us all laugh, nowt wrong with that fella.

 

[dazza1981]

Ill wait fir the ban then

We are only pulling your leg buddy!!!

 

[1stfix2ndfix]

Yeah and yes ive asked to go on the trainee forum but ive had no reply yet so I just ask my uestions on here

 

[dazza1981]

Yeah and yes ive asked to go on the trainee forum but ive had no reply yet so I just ask my uestions on here

Fire away !!!!!!

 

[Guest77]

Yeah and yes ive asked to go on the trainee forum but ive had no reply yet so I just ask my uestions on here

Now we know you are a trainee the banter will cease, it would be wise if you add the fact you are a trainee into your signature until one of the admins lets you into the trainee section mate.

 

[rapparee]

Yeah and yes ive asked to go on the trainee forum but ive had no reply yet so I just ask my uestions on here

well an mcb is only good at detecting an overload or short circuit, it will not detect a fault between neutral and earth

 

[trev]

Get on to Paul M, he's pretty much responsible for what goes on in there, he doesn't bite so don't worry. While you're on PM Sintra, High Tower and Marvo. Between them they'll sort you out mate.

Btw there's a Q.

 

[1stfix2ndfix]

You were obviously not here when lofty was, he was asking all these genuine questions which seemed to make this lot think he was taking the the wined up and taking the ****, then he got banned lol was a bit gutted at the time as i wasnt lol and the more i tried to explain that the worse it got. I went into groundworks after that (digging holes) and then that went ---- up so I returned as a mate with the intention of trying to get the nvq done this year (if i can the scope of work it requires) at the moment its boards and bonding only and thats what i think these guys specialise in (at least i know how to bond now, why one of you couldnt tell me last time ill never no

Will keep persevering tho

 

[1stfix2ndfix]

Started writing that before the other posts if it comes across funny. Its all good I can handle the banter m8 it just nice when you feel you can asking something the way you see it and then you can get an answer to the way you put it that you understand and follow. I thought it was hilarious last time theres me asking all these questions and a lot of people are getting really ****ed of with them. I was enjoying defending myself but then all of a sudden I couldn't log in.

 

[Octopus]

You were obviously not here when lofty was, he was asking all these genuine questions which seemed to make this lot think he was taking the the wined up and taking the ****, then he got banned lol was a bit gutted at the time as i wasnt lol and the more i tried to explain that the worse it got. I went into groundworks after that (digging holes) and then that went ---- up so I returned as a mate with the intention of trying to get the nvq done this year (if i can the scope of work it requires) at the moment its boards and bonding only and thats what i think these guys specialise in (at least i know how to bond now, why one of you couldnt tell me last time ill never no

Will keep persevering tho

So you are the reincarnation of Lofty!

 

[1stfix2ndfix]

Fire away !!!!!!

ok mate here you go

If you leave a 17th eddition consumer unit with its rcd taken out and replaced with a main switch so that basically you now have 2 main switches side by side one where it always is and the other where the rcd went so it stopped tripping and you could go home as it was the second job of the day, 10 hours into the day with a 2hr drive back. Is that ok as i was shown this method, straight away i was thinking hang on surely that means these guys are more likely to get a shock as theres clearly fault and now there is no point .4 trip out protection. I shouldn't question what im shown as really i should be shown right but its in my nature to make sure that it is as my gut feeling was thats a bit cowboy it just didnt look right but i could be wrong and it could be fine after all if it wasnt a 17th eddition board before then it would be no worse except and this is only how i see it through what ive been told that you would be electrocuted for 5 seconds if it was a rewireable 3036 fuse but im guess the main switch would take more then that

 

[1stfix2ndfix]

So you are the reincarnation of Lofty!

Whats the best answer