4mm spur

[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

 

[redface]

do you ever have a time when you feel stupid for doing something stupid

 

[Sintra]

Yes normally when drunk though.

 

[markc123]

Yep i feel stupid for going through a 5year apprentership when you can do it in 5weeks...but thats for another day, argument, thread....lol

 

[Ducksy]

do you ever have a time when you feel stupid for doing something stupid

Every 10 mins lol

 

[Ducksy]

Yep i feel stupid for going through a 5year apprentership when you can do it in 5weeks...but thats for another day,

You won't have to wait too long.

 

[Guitarist]

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!

 

[redface]

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

 

[Guest55]

according to the OSG , the maxium length for a 32a radial in 4mm is............

33 mtrs.


oops lol.

 

[Guest55]

it is only for a few computers ......

is this circuit on a rcd ?
how you considered accumilated earth leakage ?
high integrity earthing ?

its all unravelling pretty fast now.

 

[Ducksy]

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

 

[monkeyelectric]

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!

 

[Guitarist]

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?

 

[Silly Sausage]

I get an Ib of 14.9A @ 70m, so presuming the load is spread along the length of the circuit, he'd get away with a 16A PD.

 

[Guest55]

I get an Ib of 14.9A @ 70m, so presuming the load is spread along the length of the circuit, he'd get away with a 16A PD.

the problem is its not on its own circuit , its spured from what i presume is a ring
so dropping all of it from 32 to 16 is a mighty loss in available power.

 

[GLENNSPARK]

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..