socket circuit

P

paddyscouse

hi can some one advise me what to use for a radial socket circuit, i was thinking about 4 mil with a 32a mcb for kitchen

would then 2.5 with a 20a mcb for other room and the same for upstairs x3 beds
 
Sort by date Sort by votes
each to there own in this instance
mind you 32A radial in a domestic kitchen is hardly going to have a volt drop

i dont give a damn either lol

come to think of it i have in my house a 20A radial to each bedroom and loft
kitchen a ring circuit (had no 4mm at the time) lol
& lounge and dinning a ring circuit
 
Upvote 0 Downvote
I think that sometimes people install radials purely because they don't know how to test an RFC properly, and certainly don't understand what all this "cross-connection" mumbo jumbo is about.
I have spoken to many "electricians" over the years who have never even heard of ohm's law. One I was speaking to last year even thought it was an American cop show!!!
 
Upvote 0 Downvote
Guitarist said:
I think that sometimes people install radials purely because they don't know how to test an RFC properly, and certainly don't understand what all this "cross-connection" mumbo jumbo is about.
I have spoken to many "electricians" over the years who have never even heard of ohm's law. One I was speaking to last year even thought it was an American cop show!!!
Click to expand...

Spot on!!
 
Upvote 0 Downvote
somersetsparks said:
Rings Vs Radials ...........? Rings
Pro's and con's........... There the british way! - none of this euro crap! - Come on ENgland!

Discuss.......
Click to expand...

I was expecting more scientific / technical theories lol , oh well its a start
I'm in the radial supporters camp but i'll give the ring fanboys a head-start ;-D
 
Upvote 0 Downvote
Rings have never been the same since we went over to this rubbish single-core cable.
Would love to see T&E tri-rated. Imagine double bootlace ferrules on an RFC. No more battling to get the cable into a shallow backbox someone has fitted. :)
 
Upvote 0 Downvote
I like radials, in the right situation ! but knowing that the one major potential drawback of radials is where accessories, sockets or FCU's etc are connected in line is loss of earthing further up line if a cpc snaps off down line, yea I know it's tested but some numpty doing a socket change might not test it, I have always thought it was a shame they never made a T& E x2 so two cpc's and two L's a bit like high integrity earthing would work on a ring arrangement, dual earth sockets, cpc's split at sockets and fcu's, I don't quite know how they could keep the copper apart in the sheathing tho..

ATB J
 
Upvote 0 Downvote
i agree to a certain extent but i like to change the mix now and again and keep the lads on there toes as we do new houses,
i would be boring to do rings all the time in kitchens
 
Upvote 0 Downvote
Most countries being, or past commonwealth countries, others accepting BS7671 as a recognised standard*. The later category covers a multitude of countries, which includes China, as many of our final circuits are Rings, as well as on my last project in China.

India, Pakistan, Cyprus, Hong kong, Singapore*, Malta, Gibraltar, Suadia Arabia*, UAE*, Bahrain*, etc etc!!
 
Upvote 0 Downvote
Engineer54 said:
Most countries being, or past commonwealth countries, others accepting BS7671 as a recognised standard*. The later category covers a multitude of countries, which includes China, as many of our final circuits are Rings, as well as on my last project in China.

India, Pakistan, Cyprus, Hong kong, Singapore*, Malta, Gibraltar, Suadia Arabia*, UAE*, Bahrain*, etc etc!!
Click to expand...

Very interesting, Ive always been led to believe it was just us with rings in the world,
However its more like just us with rings in Europe then
 
Upvote 0 Downvote
Nice info there.
Yes , noticed singapore has identical wiring system to the UK when i visited last year , even the same square 3 pin sockets / plugs.
 
Upvote 0 Downvote
Engineer54 said:
Most countries being, or past commonwealth countries, others accepting BS7671 as a recognised standard*. The later category covers a multitude of countries, which includes China, as many of our final circuits are Rings, as well as on my last project in China.

India, Pakistan, Cyprus, Hong kong, Singapore*, Malta, Gibraltar, Suadia Arabia*, UAE*, Bahrain*, etc etc!!
Click to expand...

try purchasing the BS 7671 then in china from a book store (not ebay) also at what price i reckon they would be £5 over there not the £65/£75 over here
 
Upvote 0 Downvote
Guitarist said:
I think that sometimes people install radials purely because they don't know how to test an RFC properly, and certainly don't understand what all this "cross-connection" mumbo jumbo is about.
I have spoken to many "electricians" over the years who have never even heard of ohm's law. One I was speaking to last year even thought it was an American cop show!!!
Click to expand...
I think sometimes what you say is correct but this argument is something that is always brought out with people like E45 when they are losing the argument! Heard it all before, boring, boring!
 
Upvote 0 Downvote
Top Cat said:
I think sometimes what you say is correct but this argument is something that is always brought out with people like E45 when they are losing the argument! Heard it all before, boring, boring!
Click to expand...

Sorry to bore you TC. Play some music and refocus that zen :)

Btw, thank you for recognising that "sometimes what I say is correct".
 
Last edited:
Upvote 0 Downvote
paddyscouse said:
another question for you guys if i am working with a tt system what will you do to calculate my ze r1+r2 with my zs
Click to expand...
Don't do anything other than measure your Ze mate. I'm guessing you have te terminology mixed up a little though, the formula is Ze+(R1+R2)=Zs
So in your case it will be, measure the main earth loop impedance(Ze or Ra) then either add your (R1+R2) or just measure the Zs.
 
Upvote 0 Downvote
no my online friend my formula is the same as yours just wondering without looking in book will thease high readings be acceptable as, im sure its 200ohms in book
 
Upvote 0 Downvote
You may need to borrow Tony's thing there mate.
Now this is just my opinion and that of a few others, and that opinion will be contradicted by some but that 200 ohm figure in the regs is nonsense. With a little bit of thought and effort a Ze/Ra in the region of a TN system is easily achievable. All you need to do is remember depth is your friend with a TT, depth and the fattest rods you can buy.
Imho 200 ohms is not an acceptable reading upon which to base your earthing the best I've ever gotten on a TT was 0.29 and it didn't take that much work.
 
Last edited by a moderator:
Upvote 0 Downvote
kingeri said:
Because each leg of a ring needs to carry 20a, and if covered in masses of insulation, 2.5mm won't be up to the job. Hence the need for a 4mm ring......don't get me wrong, a 4mm ring is a horrendous concept, but now and again has proved necessary!
Click to expand...

A real pain in the backside if you find yourself in this situation. I always do everything possible to avoid it, including installing conduit where builders tell me "it's not necessary".... Like they know what the hell derating factors are. (apologies to any builder reading this who does know about cable factors)

Builder : Why are you putting the cable in that conduit stuff? My usual electrician just tacks it to the wall and we plaster over it.
Me: A) Because it keeps the plasterer from taking chunks out of it, and B) Because I can take the cable, inside its conduit, straight through your 24" of insulation. Next question...
 
Upvote 0 Downvote
Engineer54 said:
Most countries being, or past commonwealth countries, others accepting BS7671 as a recognised standard*. The later category covers a multitude of countries, which includes China, as many of our final circuits are Rings, as well as on my last project in China.

India, Pakistan, Cyprus, Hong kong, Singapore*, Malta, Gibraltar, Suadia Arabia*, UAE*, Bahrain*, etc etc!!
Click to expand...

I've had time to consider this otherwise informative post and have a point to raise ;
Although these countries may use BS7671 as the basis for their own wiring regs , that doesnt necessarily mean they use ring mains as a standard wiring arrangement within domestic installations ??
They could still be using radials only as per the European norm.
 
Upvote 0 Downvote
biff55 said:
I've had time to consider this otherwise informative post and have a point to raise ;
Although these countries may use BS7671 as the basis for their own wiring regs , that doesnt necessarily mean they use ring mains as a standard wiring arrangement within domestic installations ??
Click to expand...

There's a good chance Eng has installed RFC's in those Countries mate :)
 
Upvote 0 Downvote

Similar threads

littlespark
Collective thoughts about issue… Pub kitchen
Replies
9
Views
353
grumpyjohn01
grumpyjohn01
A
Diversity on a 20 Way or longer CU with many (low utilisation) ring mains
Replies
4
Views
704
axt123
A

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Green 2 Go Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses Heating 2 Go Electrician Workwear Supplier
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

Advert

YOUR Unread Posts

Daily, weekly or monthly email

Receive a daily, weekly, or monthly email containing a digest of new and recently updated threads.

Thread Information

Title
socket circuit
Prefix
Forum
UK Electrical Forum
Start date
Last reply date
Replies
92
Unsolved
--

Thread Tags

Tags Tags
circuit electricians' talk socket

Advert

Thread statistics

Created
paddyscouse,
Last reply from
Dave 85,
Replies
92
Views
8,098

Advert

TrueNAS JBOD Storage Server

Tilers | UK Tiling Forum | Tilers Forums | Find a Tiler
UK Tiling Forum by Tilers Forums UK
Plumbers Forums | Plumbing Advice | Gas Forum
Outside Play
Back
Top