Disagreement between two electricians in new kitchen installation. Who's right?

[woz]

I'm having a new kitchen fitted with a bosch 7.2KW induction hob and bosch 3.45KW oven. Electrician 1 has decommissioned the old 6mm cable from the consumer unit and replaced it with a 10mm cable connected to the old 32a fuse on the RCD side of the consumer unit. From the 10mm cable he's put a 45a switch for the hob and proposed looping through another 45a switch for the oven. He says if the 32a fuse is found to be too low he'll replace it with a 45a one.

Electrician 2 says this is not safe. He says the 3.45KW oven is a 16a appliance an should be protected by a 16 or 20a fuse not 32a. He proposes putting a second small consumer unit on the end of the 10mm cable in a cupboard feeding just the oven with a 16 or 20a fuse inside. I don't want this, taking up valuable cupboard space. Another option would be to recommission the 6mm cable and connect it to a 16/20a fuse in the main consumer unit with RCD protection.

Who's right?? The kitchen fitter is returning tomorrow to remove the cupboard units to get to the plastered in 6mm cable and chase the walls for electrician 2 to fit a switch above the cupboard unless someone tells me the work done by electrician 1 is fine!

Thanks in advance.

 

[Andy78]

1 switch to a duel outlet would be best IMHO

I'd use a dual outlet. With a duel outlet the two appliances would be fighting with each other for available power. :wink_smile:

 

[woz]

A Scolmore 45a Easyfit Dual Appliance Outlet Plate?

 

[Leesparkykent]

Electrician 2 said the cable that comes with the oven (the one with the kettle lead type of female plug) will burn before the 32a MCB goes if current is overloaded. Which is why he says a 16 or 20a MCB is necessary to protect the oven cable.

it would be impossible for that section of cable to become over loaded due to having a fixed load appliance at the end of that particular bit of cable. IMO electrician 1 is correct and electrician 2 is a tool.

 

[telectrix]

Electrician 2 said the cable that comes with the oven (the one with the kettle lead type of female plug) will burn before the 32a MCB goes if current is overloaded. Which is why he says a 16 or 20a MCB is necessary to protect the oven cable.

the oven can be regarded as a "fixed load". in layman's terms, that means the fuse/MCB neeeds only to protect against short circuit, not overload.

 

[telectrix]

beaten to it by the southern fast fingered expert. :troll:

 

[telectrix]

it would be impossible for that section of cable to become over loaded due to having a fixed load appliance at the end of that particular bit of cable. IMO electrician 1 is correct and electrician 2 is a tool.

totally agree. as i said earlier, he's talking out of his arse. probably a Electrical Trainee who fell asleep for the 2 minutes when fixed load appliances were discussed.

 

[Dave OCD]

And as he works for the kitchen company there's probably sour grapes as they didn't get the [usually ridiculously priced] electrical work.

 

[Darkwood]

Electrician 2 said the cable that comes with the oven (the one with the kettle lead type of female plug) will burn before the 32a MCB goes if current is overloaded. Which is why he says a 16 or 20a MCB is necessary to protect the oven cable.

I would suspect the cable on the oven is adequate for its job if it comes with the oven, I suspect it a 1.5mm and will be adequate for the job, I also suspect your Kitchen fitter Electrician has become one through a short course and not the 3-4yr college route that your own Electrician may have taken, I lack info' to be certain of any of this but I feel your own Electrician here is the one to listen to.

 

[Darkwood]

I'd use a dual outlet. With a duel outlet the two appliances would be fighting with each other for available power. :wink_smile:

Predoctive taxt is the burden of modern society :cool3:

 

[Andy78]

Predoctive taxt is the burden of modern society :cool3:

That's easy for you to say....

 

[Octopus]

Most kitchen companies don't score the electrical changes properly so they cut corners.

 

[Flanders]

If electrian 2 is realy that bothered he could fit a 13 amp fused control unit connect to incomming side to the 45amp cooker switch , then you could turn off each apliance separately and will protect the cable supplying the oven athough as other have said this is not required , i like the double outlet plate method

 

[Dave OCD]

If electrian 2 is realy that bothered he could fit a 13 amp fused control unit connect to incomming side to the 45amp cooker switch , then you could turn off each apliance separately and will protect the cable supplying the oven athough as other have said this is not required , i like the double outlet plate method

No he couldn't as the oven in question is 3.45kW

 

[telectrix]

No he couldn't as the oven in question is 3.45kW

award yourself sa cigar for spotting that. but i'd bet that a 13A fuse would never blow on 14.3A. :49:

 

[Flanders]

No he couldn't as the oven in question is 3.45kW

Woops sorry did not notice , then it looks like dual outlet plate would be the best way to go