Info on a dedicated circuit for a welding machine required.

[Isol8or]

Fuses and MCBs protect cables - not CUs.

RCDs protect people.

Yes I know that, jeez do us newbies really need to be so anal when writing a post trying to explain an idea.
This is my anal reply - Your statement implies that I have said that a CU protects cables?!? Obviously not what you meant but one good deed deserves another.

 

[EFLImpudence]

Yes I know that,

No you don't.

jeez do us newbies really need to be so anal when writing a post trying to explain an idea.

It's not anal - you are using the wrong terms so no one knows what you really mean.
I'm still not sure you mean what you write when you use RCD, RCBO, MCB etc.

This is my anal reply - Your statement implies that I have said that a CU protects cables?!?

No. You keep saying a Fuse/MCB is to protect the CU. See what I mean?

Obviously not what you meant but one good deed deserves another.

No. You even got that wrong.

 

[Isol8or]

Read what you wrote out loud and you'll see what I mean, I don't have time to talk Vulcan with you.

 

[EFLImpudence]

Live long and prosper - get an electrician.

 

[Isol8or]

Get off your high horse, I don't need you to tell me to get an electrician. I have a genuine interest in how everything works in my house. It was a mistake asking for advice on here, a very small percentage of replies was actually informative.

 

[EFLImpudence]

Friday afternoon -

So out of interest can you tell us what the qualified electrician told you was necessary fopr a safe and compliant installation ? After all we might learn something that we need to know.

 

[bernardgreen]

While I'm at it I might as well explain that the new CCU will be in an extension which is Henley blocked

Are you aware there is a maximum permitted lenght of tails between meter and the single point of disconnection which when operated disconnects all power to the property ? In many new installation this is an isolator fitted in the meter cabinet. An isolator and not a fuse or MCB or RCBO. The tails are protected by the DNO fuse in the cut out.

If you run long tails, from memory 5 metres is maximum, to the new CU then there should be a means to safely isolate them at the meter box.

The more you write the more obvious it is that you do need an electrician to do this installation for you.

 

[RF Lighting]

Ok I'm not saying your not right, don't be so touchy, I'm just giving more information about what the situation is incase it makes a difference to the design in regards to safety. While I'm at it I might as well explain that the new CCU will be in an extension which is Henley blocked and has the 80A switch fuse I mentioned. It will be interesting to see if the electrician chooses to use another switch fuse or rely on the MCB in the RCBO.

What do you mean by "the MCB in the RCBO?"

Do you understand why upfront RCD protection on a submain is a really bad idea?

 

[Isol8or]

What do you mean by "the MCB in the RCBO?"

Do you understand why upfront RCD protection on a submain is a really bad idea?

You don't know what an RCBO is do you.

 

[Isol8or]

Are you aware there is a maximum permitted lenght of tails between meter and the single point of disconnection which when operated disconnects all power to the property ? In many new installation this is an isolator fitted in the meter cabinet. An isolator and not a fuse or MCB or RCBO. The tails are protected by the DNO fuse in the cut out.

If you run long tails, from memory 5 metres is maximum, to the new CU then there should be a means to safely isolate them at the meter box.

The more you write the more obvious it is that you do need an electrician to do this installation for you.

Yes I do know this, what do you think a switched fuse means? Let me spell it out for you like this. http://www.screwfix.com/p/wylex-80a...v5IhOLc63so6prAu-_uDB-I0OoxaHiXiT4aAudW8P8HAQ

 

[RF Lighting]

I don't think I'm the one here with a lack of understanding

 

[Isol8or]

Friday afternoon -

Not going to happen now purely because I would rather shove wasps up my arse than share the solution with the people on here.

 

[EFLImpudence]

There's a surprise.

 

[Isol8or]

There's a surprise.

Well it would to you wouldn't it because you don't have enough people skills to realise that you don't deserve an explanation.

 

[JohnW2]

What do you mean by "the MCB in the RCBO?"

I've been keeping largely out of this but, to be fair, I think it's fairly apparent that he was referring to the over-current functionality of an RCBO.

Kind Regards, John