socket circuit

[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

 

[sedgy34]

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!!

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

 

[Engineer54]

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

The black market ones probably would be!! lol!!!

 

[Knobhead]

Cue the Goons The Ying Tong Song - The Goons - YouTube

 

[Top Cat]

Absolutely brilliant Tony!

 

[Top Cat]

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!!!

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!

 

[Guitarist]

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!

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

Btw, thank you for recognising that "sometimes what I say is correct".

 

[Top Cat]

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

Btw, thank you for recognising that "sometimes what I say is correct".

Sorry Guitarist, that's not what i meant! What i meant to say was sometimes electricians do not know how to test a ring circuit! Humble apologies to someone i respect!

 

[paddyscouse]

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

 

[trev]

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

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.

 

[paddyscouse]

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

 

[Knobhead]

Do you want to borrow this?

View attachment 13102

 

[sedgy34]

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!

Hey TC

Google E45 it's soothing lol

 

[trev]

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.

 

[Top Cat]

Hi sedgy, yes an --- wipe!

 

[kingeri]

Really!! ...Why's that then??

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!