Workshop ring 110v ring main? what is the best way

[mgnelec12]

Hi There,

I am currently wiring a car body repair workshop.

The owner doesnt want transformers everywhere and has asked me to lookinto 10 x 110v twin points around the workshop running from one transformer.

I have looked into it and was just checking whether to wire the circuit in 4.00m singles as the run to the furthest point will be about 80 metres by the time you follow the existing steel trunking.

Can anyone confirm this?

Many Thanks

Sam

 

[shocking_eg]

might need 6mm depending on how many you are intending to put on each radial ?

 

[mgnelec12]

Thinking of doing it in a ring to even out the load.
there will be probably 8 twins on the circuit

 

[shocking_eg]

Thinking of doing it in a ring to even out the load.
there will be probably 8 twins on the circuit

#

is there only one outlet from this transformer ?

it is a proper permanent install one or a portable jobby ?

 

[mgnelec12]

Looking at probably 5KVA wall mounted transformer to do 2 similar circuits as they say there will not be much power needed, sanders/polishers etc

 

[shocking_eg]

well just work out your maximum load you will need including diversity and then apply to cable calcs and you shall have the correct cable.
simples

 

[Knobhead]

What protection are you using on the 110V side?

 

[Lighthouse Phil]

Tony has raised a good and important point.
We have 110V sockets in our workshops and they are protected in the 1st instance by an RCD supplying the Tranny, then double pole MCB's in the 110V C.U.