4mm spur | Page 3 | on ElectriciansForums

Discuss 4mm spur in the UK Electrical Forum area at ElectriciansForums.net

R

redface

dose anyone use 4mm tw/e now to supply sockets on 32a mcb as a spur if so what distance can you go in plastic 3 compartment trunking reference method c is 37A but methord B is 32A
now as there is only 1 cable in trunking. so i cant see why it drops 5A just to being inclosed in plastic

or dose everyone still use 2.5 ring circuits
 
there is only so much **** take i would say i have more qualifications than most of you and experiance it was just a question just didnt word it very well

We only asked how you designed the circuit. As you are so qualified, explain your design and we can give you constructive advice.
So far, you've only told us that you're not sure about a system you've already installed!
 
i am sure it ok and i havnt finished it yet the real long circuits which have a lot of sockets on i have ringed in 4mm volt drop is fine because what ever is plugged in can only draw 13A anyway and it will never ever pull 32A there really in no calculation to carrie out

4mm tw/e can take 32 A in trunking max volt drop would be about 10A on 70m circuit you can draw max of 13A for Ib

also onsite guide says max of 75m squared floor area

i do think its ok just on boarder but wont serve much

- - - Updated - - -

sorry not 10A --- 10V
 
Mate turn that 4mm radial into a 4mm ring you allowed 176meters that way .... Like I said in a previous post you over twice the allowed length at 70meters, and like buff says the max 4mm radial is 33meters.

I mean biff....I don't even know what he looks like lol
 
Last edited by a moderator:
i am sure it ok and i havnt finished it yet the real long circuits which have a lot of sockets on i have ringed in 4mm volt drop is fine because what ever is plugged in can only draw 13A anyway and it will never ever pull 32A there really in no calculation to carrie out

4mm tw/e can take 32 A in trunking max volt drop would be about 10A on 70m circuit you can draw max of 13A for Ib

also onsite guide says max of 75m squared floor area

i do think its ok just on boarder but wont serve much

- - - Updated - - -

sorry not 10A --- 10V
Perhaps you should put it on a 16A mcb then if all it will ever draw is 13A!
Edit: even then its too much volt drop, change it to a 10A instead!
 
i am sure it ok and i havnt finished it yet the real long circuits which have a lot of sockets on i have ringed in 4mm volt drop is fine because what ever is plugged in can only draw 13A anyway and it will never ever pull 32A there really in no calculation to carrie out

4mm tw/e can take 32 A in trunking max volt drop would be about 10A on 70m circuit you can draw max of 13A for Ib

also onsite guide says max of 75m squared floor area

i do think its ok just on boarder but wont serve much

- - - Updated - - -

sorry not 10A --- 10V

I'm sorry, but I wouldn't say that a 32A radial will only ever have one appliance capable of drawing 13A plugged into it, so I wouldn't design my total expected load to be 13A.
Other members have already covered some of the other issues you have with this setup.
Why are you now asking our opinions if this installation is complete?
 
i am sure it ok and i havnt finished it yet the real long circuits which have a lot of sockets on i have ringed in 4mm volt drop is fine because what ever is plugged in can only draw 13A anyway and it will never ever pull 32A there really in no calculation to carrie out

4mm tw/e can take 32 A in trunking max volt drop would be about 10A on 70m circuit you can draw max of 13A for Ib

also onsite guide says max of 75m squared floor area

i do think its ok just on boarder but wont serve much

- - - Updated - - -

sorry not 10A --- 10V
LOL....
hit the road will ya....lol..
 

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