Just had my installation failed- couple of answers needed please. | on ElectriciansForums

Discuss Just had my installation failed- couple of answers needed please. in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net

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Davey101

Now I know I might get some raised eyebrows, or possibly shot down in flames, but I'd rather be honest than pretend that I'm a super spark who always does things by the book. Also, I should point out that I am a 35 year old approved spark, with my 2391, and I've just spent 3 months testing a largish job for the firm I work for. Because I dont work for myself , I am not registered with anyone, and have zero knowledge of 'part P'. I was under the impression that part p was a pretty slap dash sort of test, and the tester would only be there 1/2 hour, seems he was more thorough than I was expecting:D

I've just wired my parents new kitchen, and have had it 'part p' inspected. Its failed on a several things, a couple of which I could do with advice on please.

1 Outside lights- I wired 2 lights with a 3 core flex (I had ran out of 4 core), unfortunatley the lights I bought didnt have an overide facility to enable them to be manually left on by 'flicking' the switch on, off, on (the first outside lights I've seen for a long time that didnt have that facility:confused:)
Anyway, to get them working in manual, I used the green/yellow core from the switch to the first light as a switchwire, and obviously sleeved it brown both ends. I then cut the flex between fittings, installed a JB (accesible in the loft), and wired in a cpc from the main lighting circuit. (I only needed a switch live, neutral and earth between fittings.
I understand from reg 514.4.2 that a "single core cable coloured G/Y shall only be used as a protective conductor, and not be over marked at their terminations". Presumably this means that sleeving a G/Y in a flex or similar is ok?
The tester picked up the fact (wrongly) that the light fittings were not earthed (I presume that he just saw the lack of a cpc from the switch and assumed the worst). I will explain to him the wiring arrangement, but am not sure if I will then get picked up for using the cpc for live.



2.Utility room- The kitchen and shower room have, or will have when they are finished, fans fitted, however I wasn't planning on putting a fan in the utility room (because my parents didnt want one). The room has an opening window, but the part P spark tells me that I also need to install a fan. I was under the impression (wrongly) that I didnt need one because of the window. After a bit of digging around the net, it seems I do need one, although the issue of the window is a bit vague, can someone give a reg that shows you do definatley need one, even with a window?

It also failed on the wrong size fuse in the(temporary) FCU supplying the extract hood (I didn't have one with me, and totally forgot about it (I was going to change it when I changed the FCU))
It also failed on 2 KO boxes not having grommets in (I ran out of grommets, and thought I'd get away with it:D).
Three questions then-
1. Can I use the G/Y core as a live conductor
2. Although it isn't obvious how the light fittings are earthed, thus failing the inspection part, is it acceptable to simply prove they have an earth by doing an R1+R2, or R2 test?
3. Do I definatley need a fan in the utility room, despite it having a window?
Also, although it is obviously good practice, where is the reg stating that grommets must be used (I'm not saying that they dont have to be, and I would also fail an installation if it didnt have them)

Cheers, Dave.
 
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Three questions then-

1. Can I use the G/Y core as a live conductor NO as you say reg 514.4.2 prevents it.

2. Although it isn't obvious how the light fittings are earthed, thus failing the inspection part, is it acceptable to simply prove they have an earth by doing an R1+R2, or R2 test? I cant see a problem with this apart from wiring in flex.

3. Do I definatley need a fan in the utility room, despite it having a window? Building regs require a fan is it an existing utillity or a new one?
Also, although it is obviously good practice, where is the reg stating that grommets must be used (I'm not saying that they dont have to be, and I would also fail an installation if it didnt have them). I would Need to look that one up.
 
Three questions then-

1. Can I use the G/Y core as a live conductor NO as you say reg 514.4.2 prevents it.

2. Although it isn't obvious how the light fittings are earthed, thus failing the inspection part, is it acceptable to simply prove they have an earth by doing an R1+R2, or R2 test? I cant see a problem with this apart from wiring in flex.

3. Do I definatley need a fan in the utility room, despite it having a window? Building regs require a fan is it an existing utillity or a new one?
Also, although it is obviously good practice, where is the reg stating that grommets must be used (I'm not saying that they dont have to be, and I would also fail an installation if it didnt have them). I would Need to look that one up.


Whats wrong with flex? Always been a grey area, but I cant see a problem?
Also,(I presume) the regs relate to a single core cable i.e singles in conduit?
Its a new utility room.

Cheers, Dave.
 
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A conductor in a cable, definition of a protective conductor


If we take the view that it is a single core cable coloured throughout its length that is not permitted, then a g/y in a muticore may be permitted although not good or standard practice

Nothing wrong with flexible cable,you can wire the whole house in the dreaded stuff if your that way inclined:)
 
Thanks Des, that was my take on it as well, obviously not something I would normally do, but it was either that, or take the fittings back, and spend a lot more for something similar. Needs must I'm afraid.
 
davey... your grommet question will be covered in 611.3 (iii)

and your utility room fan in the part p book...electricians guide to building regs (a green one thats like the onsite guide...)

10.5 pg 131.... utility room fan must be 30 litres/sec

from a fellow cowboy...lol :eek:
 
davey... your grommet question will be covered in 611.3 (iii)

and your utility room fan in the part p book...electricians guide to building regs (a green one thats like the onsite guide...)

10.5 pg 131.... utility room fan must be 30 litres/sec

from a fellow cowboy...lol :eek:

Er, thanks, I think.
 
only joking dave... sounds like you did a good job, even tho' you're not a regular house basher.

and nice of you to do your parents job for nowt too....

i'm self employed...i have a 2391 ... was thinking of going for a test/insp job with a company ...i guess i would struggle initially as i have no industrial/commercial experience.... would you recommend it?
 
drifting a bit off the original topic here, but I'm in the same boat as the op, I'm a time served spark currently wiring a house that myelf and the mrs have bought, I have no part p as i also work for a firm, who are these testers your talking about? are they employed by the council to sign the job off?
 
only joking dave... sounds like you did a good job, even tho' you're not a regular house basher.

and nice of you to do your parents job for nowt too....

i'm self employed...i have a 2391 ... was thinking of going for a test/insp job with a company ...i guess i would struggle initially as i have no industrial/commercial experience.... would you recommend it?

You'd have to ask someone with more experience mate TBH.
It would seem to me though, that it would be a LOT easier to become a tester in an industrial situation, than an industrial spark, you only need to know WHAT you should be doing, without actually being able to do it;)
I'd say go for it.
Thanks for the book suggestion, I shall be adding it to my christmas list.

Gaz, thats exactly what they are. I think my parents had to pay the council ÂŁ50.
Amazing isnt it, that we can wire and test multi million pound jobs (not single handed tbh though:D), but cant sign off your house.
 
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thats what i was thinking davey...a couple of years of industrial experience while the recessions on.... and by learning to test it, i reckon you'd soon pick up the installation methods, i'd feel confident about going back to self employment then, and trying different work..

gaz76... some building control departments do their own electrical inspections... and some employ niciec contractors to do it...
 
You'd have to ask someone with more experience mate TBH.
It would seem to me though, that it would be a LOT easier to become a tester in an industrial situation, than an industrial spark, you only need to know WHAT you should be doing, without actually being able to do it;)
I'd say go for it.
Thanks for the book suggestion, I shall be adding it to my christmas list.

Gaz, thats exactly what they are. I think my parents had to pay the council ÂŁ50.
Amazing isnt it, that we can wire and test multi million pound jobs (not single handed tbh though:D), but cant sign off your house.


agree matey, bit of a joke that I'm going to have to pay some council spark to tell me my house won't be burning to the ground anytime soon!!
 
in my last job I used to do part p inspections for a local council, we always did a first fix inspection & then a full inspection & test. Out of about 150 tests only 1 spark tested his own work & supplied a certificate....mmmmmm Quality sparks in cornwall !!!!!
 
I did some work at my sisters, I supplied the certificate all the council did was send some bod round who looked at where the bonding was done and left ÂŁ200.00+.

kerching!!!!
 
trouble is most electricians dont test their own work when they are not part p registered because someone else is going to test it for them & they must think why bother? , this is a deviation from the regs, they say that every installation must be tested before use !!.
 

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