New cooker circuit but is the new consumer unit legal?

[spynage]

A customer has asked me to install a new ceramic hob to replace a gas one that requires it's own new circuit. After inspecting the DB a dual rcd model fitted about 3 years ago I noticed there were no stickers apart from an RCD one. No inspection dates and no old wiring stickers either. It seemed shabby as well and the DIN rail was visible through a missing slot cover.

After inspecting the wiring I noticed the 4 kitchen sockets were fed by a single 4 or 6mm radial circuit labelled cooker. I told her about this and suggested the new DB may not of been installed by a certified electrician because of this radial circuit. She said of course it was and that also the house had passed an inspection.

Anyway I priced a new surface mounted circuit, BUT if I suspect the DB has not been registered should I proceed with the work? On initial inspection there's not too much wrong with it apart form the missing slot cover and stickers and dodgy circuit. None of the circuit's are accurately labelled.

Thanks

 

[vjsmarwick]

Lol just read this and can't even see a reason to place a comment on wiring how about a game of cards anyone know any good games ?

 

[GLENNSPARK]

Lol just read this and can't even see a reason to place a comment on wiring how about a game of cards anyone know any good games ?

lol its bloody hopeless isn`t it...

 

[Geoffsd]

The cooker is plugged into the 4mm radial with the sockets. I don't know it's rating. The Hob is 6000w so I'm guessing 6mm would serve them both, or 10mm?

6000 + 3000 = 9000 / 240 = 37.5 - 10 x 0.3 + 10 = 18.5A

2.5mm and 20A MCB would do, method C.

Table 4D5


10mm and 50A to be safe.

 

[guest119]

Have you checked the incoming supply to see if it will take the additional load?

Boydy

 

[richy3333]

I might advise them to change the filter though! The oven sits on this 4mm radial so I have to consider wether I should leave it on this circuit or join it with the hob on the new radial. Possibly the difference between 6 and 10mm cable.

What is wrong with advising to make a radial a ring when that is how it should be? On my planet I was told that sockets endlessly spurred off one another were a fault and would fail an inspection. Wouldn't the additional cable increase the circuit rating and allow the oven to be kept as it is as well as creating a ring circuit as was intended for the kitchen?

In short, I really don't think you know what you are talking about?

 

[richy3333]

Yes. Sockets endlessly spurred off one another. Should they not be a ring final?

23A enclosed in an insulated wall.

The SO are not endlessly spurred of one another - it's a radial circuit? Look in the back of the BGB??

 

[richy3333]

The cooker is plugged into the 4mm radial with the sockets. I don't know it's rating. The Hob is 6000w so I'm guessing 6mm would serve them both, or 10mm?

Cooker rating - Visit house, write down make and model, look it up on inter web, hey presto you have the information you require. It aint rocket science and takes the guess work out of the job?

 

[richy3333]

Have you checked the incoming supply to see if it will take the additional load?

Boydy

Don't you start! The lads confused over a ring/radial. You'll blow his mind next!!