radial circuit wiring diagram with fused spurs advice

[ban-all-sheds]

Well that answered aptsys's question.

What about the other one you quoted there?

 

[Mahony76]

Well that answered aptsys's question.

What about the other one you quoted there?

do you mean your question about IZ of cable? I have had a very similar radial circuit installed in my home office, using the same sized 2.5mm cable, although this was without the spur for the lighting which from what i have researched and been told am going to use 1.5mm cable from the 3A fused spur. All the cable will be run through pvc conduit. I am trying to keep costs down doing the internal wiring myself, plus I enjoy doing as much myself as possible, but this will obviously all be checked with the electrician and he will install the appropriate sized MCB.

 

[ban-all-sheds]

do you mean your question about IZ of cable?

Yes, that was the question.

You have decided to assume the role of designer - did you do that without actually knowing how to do the design?

I am trying to keep costs down doing the internal wiring myself, plus I enjoy doing as much myself as possible,

Indeed, but it's no use thinking that it's OK to do things which you don't know how to do properly.

but this will obviously all be checked with the electrician and he will install the appropriate sized MCB.

If you are going the 3rd party certifier route then you need to appoint one before you do any work, and that includes design. What you have said there sounds AAF - the breaker rating is chosen to support the load for which the circuit is designed, and then an appropriate cable used. It is not done by installing a cable and then picking an MCB rating which suits the cable.

 

[Mahony76]

Yes, that was the question.

You have decided to assume the role of designer - did you do that without actually knowing how to do the design?



Indeed, but it's no use thinking that it's OK to do things which you don't know how to do properly.



If you are going the 3rd party certifier route then you need to appoint one before you do any work, and that includes design. What you have said there sounds AAF - the breaker rating is chosen to support the load for which the circuit is designed, and then an appropriate cable used. It is not done by installing a cable and then picking an MCB rating which suits the cable.

you sir sound a bit of an arse!...I only asked if the design looked ok, and have had some constructive criticism from most people, you not been one!...it has always been my intention to get an electrician in to have a look At my ROUGH plan, not a professional design!, before I did any work and then advise me on anything that needs changing!...as far as I'm aware for a radial circuit in a conservatory used as a dining room with 3 double sockets, an external socket for running a lawn mower off, a fused spur for a 2kw electric heater and fused spur for a light then using 2.5mm for the sockets and 1.5mm cable for the lighting with a 16a or 20a mcb is correct...like I said if I am wrong then the electrician will advise me on what to use!

 

[ban-all-sheds]

it has always been my intention to get an electrician in to have a look At my ROUGH plan, not a professional design!, before I did any work and then advise me on anything that needs changing!

If that is true then you did not tell the truth in your original post:

I'll install all the wiring and sockets myself then get an electrician in to check and connect up to the house fuse box.

 

[Mahony76]

If that is true then you did not tell the truth in your original post:

Its not that i didn't tell the truth, I am no liar!, I just didn't say I would have a electrician check my rough design first, which I will, then do the wiring myself and THEN get the electrician to check it all over and connect it up!...In my original comment I merely put up the diagramming in order to gain some constructive feedback, I was not stipulating my planned schedule of work and exact order of process, I think most people on here realise that and have been really helpful and all of their advice gratefully received...but I suppose there is always going to be one or two keyboard warriors!

 

[ban-all-sheds]

Where you see a "keyboard warrior" I see someone concerned that people should not carry out electrical work which they don't really know how to do, and concerned that they do not misinterpret the legal requirements regarding notification and end up with their building project screwed.

 

[winston1]

and fused spur for a light then using 2.5mm for the sockets and 1.5mm cable for the lighting with a 16a or 20a mcb is correct...like I said if I am wrong then the electrician will advise me on what to use!

Lighting does not need 1.5mm cable. 1.0mm is sufficient, cheaper, and easier to run.

 

[Mahony76]

Lighting does not need 1.5mm cable. 1.0mm is sufficient, cheaper, and easier to run.

Ah ok great. Now this is the kind of constructive information I was looking for, cheers

 

[Mahony76]

Where you see a "keyboard warrior" I see someone concerned that people should not carry out electrical work which they don't really know how to do, and concerned that they do not misinterpret the legal requirements regarding notification and end up with their building project screwed.

I appreciate and understand your concern but as I have said, I will only be carrying out the electrical work once I have had the all clear from an electrician, I would not do otherwise and put my family at any danger. I am quite capable of routing the wiring myself once I know what I'm doing is correct.