Cable size

hayse · 21-05-2022 11:37AM

My last post was based on a post you have edited you composed 2011. It’s difficult to have a discussion if you are changing your posts.

21-05-2022 12:44PM

The OP’s electrician has seen this and has concluded that an MCB with a 20A rating is suitable. I would think that he/ she is best placed to make that call.

A minimum of 50A is based on absolutely nothing.

kirk. · 21-05-2022 11:57PM

https://www.boards.ie/discussion/comment/119093154#Comment_119093154

There's only 1 operator

You don't need to double the capacity when you add an appliance or a machine here as it's only a domestic shed

There probably isn't 50amp spare capacity for the shed anyway because the house is already part of the load on a likely 12kva ESBN supply

You seem to be a bluffer anyway making up numbers and arguments

hayse · 22-05-2022 11:51AM

https://www.boards.ie/discussion/comment/119095725#Comment_119095725

Live in the real world now, you have to allow for expansion, winter time the op may introduce a heater, a kettle may be brought. He might have someone who wants to use their own tools if they are working on a project together.

50 amps may be over the top but they would want 40 anyway.

22-05-2022 12:15PM

https://www.boards.ie/discussion/comment/119096576#Comment_119096576

The real world is none of us have seen this therefore we only have the OP's information to guide us:

1) The OP described the load as "A couple of socket outlets. Light and Small Tools only. Max 15amp. Haven’t installed the cb yet."

2) The OP's electrican has slected a protective device rated at 20A.

3) This has been described as a "garage/shed" by the OP, not a commercail workshop where people bring their own tools.

If this is a 50A laod as you have advised then it requries a dedicated supply from the ESB. I suspect that this is nto a road that the OP wants to go down.

hayse · 22-05-2022 12:52PM

You’re right.

DonalOF · 22-05-2022 01:05PM

Thanks everyone for comments. Time to let it go now. Going with my Electrician’s recommendations.

kirk. · 22-05-2022 10:28PM

https://www.boards.ie/discussion/comment/119096576#Comment_119096576

I know you're both a logician and a mathematician as you claim so I respect that

You do know you don't add up the appliances to get the power requirement ya ? Especially as it's just a domestic shed with 1 user, not to mention the additional cost of 100m of cabling and the fact that this 40-50amp of capacity may not even exist at the supply end

hayse · 22-05-2022 10:32PM

Kirk you are correct I’m wrong.

DonalOF · 23-05-2022 09:25AM

My first time posting on Boards.ie😂

23-05-2022 02:03PM

The OP’s question has been answered and the OP has taken the sensible approach of hiring a Registered Electrical Contractor.

Everyone that has contributed is on the same page now.

I think we can leave it at that.

Cable size

Answers