Classification Codes Required Please!

[Piratepete]

Hi Guys
I have a Domestic Installation
One 14way CU with RCD Main Switch in meter cupboard
One 4way CU with RCD Main Switch in garage fed from above CU
One 8way CU in another part of the house fed from a Switch Fuse and RCD in the meter cupboard.

Wiring faults found. Codes required please!

1. Cutout fuse is 60Amp. So is the fuse in the switchfuse supplying the 8way CU! So no grading
2. 2 standard 30mA RCDs in series. No discrimination.
3. Lack of grommits in metal socket backboxes.
4. The supply to the Immersion Heater has been tapped off to supply sockets for Security cameras and also loft lighting. All subfused OK, but is it permitted?
5. No bonding to gas- that's a C2, isn't it.
6. Garage supply is 40Amp which I think is too large for the cable size/length. Exceeds volt drop.

Best Practice Guide No.4 only describes (5) above.
Looking forward to your replies.
Thanks
Pete

 

[DurhamSparky]

One 14way CU with RCD Main Switch in meter cupboard
C3 overall RCD applies
One 4way CU with RCD Main Switch in garage fed from above CU
C3
One 8way CU in another part of the house fed from a Switch Fuse and RCD in the meter cupboard.
C3
Wiring faults found. Codes required please!

1. Cutout fuse is 60Amp. So is the fuse in the switchfuse supplying the 8way CU! So no grading
....
2. 2 standard 30mA RCDs in series. No discrimination.
C3
3. Lack of grommits in metal socket backboxes.
C3
4. The supply to the Immersion Heater has been tapped off to supply sockets for Security cameras and also loft lighting. All subfused OK, but is it permitted?
NO CODE
5. No bonding to gas- that's a C2, isn't it.
C2
6. Garage supply is 40Amp which I think is too large for the cable size/length. Exceeds volt drop.
C2 depending on volt drop and cable size???

 

[telectrix]

agree^^^ no.6 may not be a C2 if the actual load is low enough to comply with VD, and the OCPD is correctly sized for the cable feeding the sub-main.

 

[DurhamSparky]

nice to see a bit of unity!!!

and piratepete i always use common sense when doing codes...!! Will/Could it Kill some one... C1.... is it against Regs but kinda safe C2 ...... every thing else that you decide needs improving is a C3

or take the would you have it in your home approach!!

 

[Piratepete]

Thanks Durham Sparky.
I'm impressed! So the installation is 'Unsatisfactory' then. :drool5:
You've ducked fault (1). Any particular reason?
Regards
Pete

 

[DurhamSparky]

you answered your own question... no code

 

[telectrix]

how long is the run between these 60A fuses? my opinion would be a code 3, as it;s not presenting a danger ( assuming that the feed to the sub-main is suitably sized for 60A OCPD

 

[Piratepete]

the OCPD is correctly sized for the cable feeding the sub-main.

A bit border line, this. Cable is 2 core 4mm SWA. I can't identify whether it's 70deg or 90deg. If 70deg, it's only good for 37 Amps. OCPD is 40Amps. However it's impossible to draw 37 Amps. Was XLPE cable around 22 years ago?
I think I'm being too picky!
Pete

 

[Piratepete]

how long is the run between these 60A fuses? my opinion would be a code 3, as it;s not presenting a danger ( assuming that the feed to the sub-main is suitably sized for 60A OCPD

About 18 inches. I would agree with a C3. It's not right, is it.

Pete

 

[Amp David]

No 3, is this codeable? If plastered into wall then no way cables can move to cause damage agaisnt metal backbox.

 

[DurhamSparky]

i would say so as you CAN improve it technically! still a pass like

 

[Amp David]

True i suppose.

 

[DurhamSparky]

end of the day every one has a differnet take on the regs and codes....

take down sockets fitted 1988 with no rcd for example!! code 1 or code 3..... i say 50/50 split would be the responses!

 

[telectrix]

end of the day every one has a differnet take on the regs and codes....

take down sockets fitted 1988 with no rcd for example!! code 1 or code 3..... i say 50/50 split would be the responses!

C1 is for a real and immediate danger. if no live parts are exposed, then the lack of an RCD can only be a C3.

 

[DurhamSparky]

Yup me as well but what if they were been used to power out door tools!

Mine would still be 3