New supply for garage, split from cut out

[Millo]

The meter is the supply?
I wouldnt be allowed to split the cutout.
Only our supplier can do that I thought.

The Ib hasn't been worked out yet.
We are mid renovation and I'm undecided on supplies.

The db at present supplies the conservatory garage and shed.

This is the reason I'm asking for help.
The shed will have a hobby lathe, pillar drill, arc welder etc.

The garage will be a gym and house the tumble dryer.

The conservatory will use a 2kw heater at some stage.

So far, I know I need an MCB for overload, 3 core SWA using The PME.
The garage db need an rcd or each circuit on rcbo.

 

[Millo]

I think from this all is sorted.
Thank you all.

 

[Darkwood]

Your choice to use the pme earth is dictated by the nature of the outbuildings and any gas or water supplies they may have, I did query you as to why you opted for a rod with main earth isolation, it could be the case you need it and getting it wrong can make your installations unsafe... please expand on your choice and why?

 

[Millo]

The garage isn't Seperate it's attached to the kitchen. It houses water through plastic piping. Also the garage is wired in singles through metal conduit.

The shed is wooden with a tin vernier and a concrete floor.

Ok let's look it through your eyes, how would you install this?

I do need help with this please. Hence why I came on a forum.

 

[Darkwood]

Use your house earth for both garage and shed as long as the shed has no structural steel and metal incoming gas or water then fine to use your origin earthing system, if your tin shed has structural metal framing then I would still use origin earthing but appropriately sized for bonding as well as grounding a rod to omit any local PD between the Earth and natural ground.

 

[Millo]

Thank you, the shed is only temporary work shop till completion of the house and will be re built in brick or again in wood.

The only thought of structural is a rsj for an over head crane but this will be manual.

I'll have a new fuse board in the shed too.

So ill use the PME for the garage and shed, and locally have a rod just for the shed.

I'll use a 3 core for the shed and garage supplies and use a 10 or 16mm earth to ground the rod straight from the earth from the shed fuse board?

Do I have to isolate the swa any where for earthing or can I ground all?