Radial Circuit

[Carlos_tlewis]

Hello,

I'm glad I've found this forum

I'm doing PIR for a customer and everything was going fine until I saw there was one 2.5mm cable leaving from consumer unit to feed 4 sockets.

The cable leaves the consumer unit and the passes threw a double pole isolator switch, it was wired this was so they could control effects lights.

At the consumer unit the radial is on a 20A MCB.

Now as the customer said there all LED lights or cameras that are plugged into the sockets so they don't require much at all.

Is there anyway this would ok? the customer asked me to check as he said when the electrician first wired it he was 'hot' on his regs. if not would it be best putting a code 2 down on cert?

Thanks,
Carl

 

[Deleted member 26818]

That's fine, as long as the floor area covered is no more than 50m².
Have a look at Appendix 15 in BS7671.

 

[telectrix]

agree. a 20A radial is OK.

 

[Carlos_tlewis]

Thanks, I've always been told thats a no go but just checked my regs and it's fine.

Feel abit silly now ha!

 

[Hawk81]

Hello,

I'm glad I've found this forum

I'm doing PIR for a customer and everything was going fine until I saw there was one 2.5mm cable leaving from consumer unit to feed 4 sockets.

The cable leaves the consumer unit and the passes threw a double pole isolator switch, it was wired this was so they could control effects lights.

At the consumer unit the radial is on a 20A MCB.

Now as the customer said there all LED lights or cameras that are plugged into the sockets so they don't require much at all.

Is there anyway this would ok? the customer asked me to check as he said when the electrician first wired it he was 'hot' on his regs. if not would it be best putting a code 2 down on cert?

Thanks,
Carl

sounds fine. what reasons do you see to think it is not?

 

[Deleted member 26818]

Wouldn't be acceptable with a 30/32A CPD.
20A or less is fine, correction factors for installation methods permitting.

 

[B6 7BU]

Hello,

I'm glad I've found this forum

Watch and learn,customer always knows best

[video=youtube;l5Mmz1OnCR8]http://www.youtube.com/watch?v=l5Mmz1OnCR8[/video]

 

[Carlos_tlewis]

Hawk81, when I was an apprentice my boss always told me that it's not right, now I wonder how many times we must have ran new cables into make it a ring... when I see my ex boss I'm gonna ask him if he knows about this.

Thanks alot for the help

 

[Hawk81]

Hawk81, when I was an apprentice my boss always told me that it's not right, now I wonder how many times we must have ran new cables into make it a ring... when I see my ex boss I'm gonna ask him if he knows about this.

Thanks alot for the help

I agree you should definitely question your ex boss. Radial circuits are a very basic and simple way of wiring sockets and many prefer to do it this way. It is taught in first year in college.

 

[Sparky Ninja]

I agree you should definitely question your ex boss. Radial circuits are a very basic and simple way of wiring sockets and many prefer to do it this way. It is taught in first year in college.

That's because a radial is better, and safer!!

 

[Hawk81]

That's because a radial is better, and safer!!

Agreed and you forgot easier to test.

 

[JonathanP]

You mentioned an MCB but not RCD or RCBO protection. Would definatly recomend RCD protection. Check out reg 411.3.3??

 

[Sparky Ninja]

Agreed and you forgot easier to test.

That would be included in my 'better' reasoning.

 

[telectrix]

shall we start a radial appreciation society?

 

[Sparky Ninja]

You mentioned an MCB but not RCD or RCBO protection. Would definatly recomend RCD protection. Check out reg 411.3.3??

I'm pretty sure he would be aware of that regulation if he is doing PIR's