Oven trouble need larger than 13a

[chris day]

quite frustrating as a client purchased a 16a oven.

32a ring supplies 13a fused spurs for the old ovens.

I can’t downgrade the MCB to a 20a because the microwave will trip with the oven on.

How can I fuse the 20a ovens locally by replacing the 13a fused connection units.

I am quite sure there is no other way?

I don’t want a mini DB

 

[davesparks]

Oven is 16 A, so only using 50% of the circuit capacity, so how many points is this circuit feeding? And if 2kw load need a dedicated circuit, then what are these 13A fused spurs about, I might have spurs on my cowboy boots, but by my calculations a 13A fused spur at 230V means you are tapping 3kw branches off an existing ring?

A 13A fuse doesn’t necessarily mean that a 3kW load is connected.
Not all 2kW loads need a dedicated circuit, however the regulations recommend a dedicated circuit for some types of load.
The regulations also specify that cooking appliances should not be fed from a ring final circuit.

 

[Jason Philip]

I'm quoting taylortwocities

 

[Jason Philip]

I'm quoting taylortwocities

 

[Midwest]

A 13A fuse doesn’t necessarily mean that a 3kW load is connected.
Not all 2kW loads need a dedicated circuit, however the regulations recommend a dedicated circuit for some types of load.
The regulations also specify that cooking appliances should not be fed from a ring final circuit.

I thought that was an informative guide Appendix 15, referencing 433.1?

 

[Pete999]

QUOTE="Pete999, post: 1382513, member: 72029"]Where does it say anythinover 2Kw needs a separate circuit? do you have a Regulation Number I can refer too?

I'm quoting taylortwocities[/QUOTE]
Thanks Jason I'll pass the question on to TTC then

 

[Midwest]

I'm quoting taylortwocities

Thanks Jason I'll pass the question on to TTC then[/QUOTE]

It may be referring to the assumption made by 433.1?

 

[Pete999]

We don't do things like that here in the UK! Being a cowboy may be OK where you come from but not here.
Loads greater than 2KW should be on their own circuit.

Do you have a Reg number TTC for that information? I'm genuinlly interested because I have always advocated that, but have been shot down a few times so a reg I could quote would be great.

 

[Pete999]

Thanks Jason I'll pass the question on to TTC then

It may be referring to the assumption made by 433.1?[/QUOTE]
Thanks Middy but all 433.1 says is "Every circuit shall be designed so that a small overload of long duration is likely to occur" no mention of a circuit of over 2 Kw needing a separate cuircuit. Assuming that is what you were referring to.

 

[Taylortwocities]

You said

How about swapping out the 13a switched FCU for a 20A dp switch

That is not acceptable.
A 13A FCU is allowed, but there are two ovens like this. I would advise that careful survey of the other loads. That ring may already have all of the substantial loads on it. DW, WM, TD etc.

My comment on cowboy is because you appear to live in Trumpland. ?

The 2Kw figure is from App 15 where we are advised that separate circuits are suggested to prevent large loads being attached to a ring final.

 

[Pete999]

You said
That is not acceptable.
A 13A FCU is allowed, but there are two ovens like this. I would advise that careful survey of the other loads. That ring may already have all of the substantial loads on it. DW, WM, TD etc.

My comment on cowboy is because you appear to live in Trumpland. ?

The 2Kw figure is from App 15 where we are advised that separate circuits are suggested to prevent large loads being attached to a ring final.

TTC I agree Appendix 15 does say that to to avoid overloading a RFC, can be achieved by ensuring cooking loads of over 2 Kw could be placed on their own dedicated circuits, so it's an advisory only, I have been shot down so many time advocating this, hence my question. is that the only referrence you have on the subject? it's not very decisive is it? was just wondering if you have come across something more definite.

 

[Jason Philip]

[QUOTE="my comment on cowboy is because you appear to live in Trumpland. ?/QUOTE]

That's correct, Blue state though, (CA). We don't use ring circuits here for residential so the cooker would be on a dedicated circuit anyway, in this case if it's two 16a cookers then a 32a design load would mean a 32x1.25 = 40A dedicated circuit would be required to supply both ovens.

 

[UKMeterman]

Another idea, look at the oven and check the max demand on the rating plate, often it is less than 3Kw. If it is 3.6Kw, fit a 16amp double pole MCB in suitable encloosure at back of adjacent cupboard and feed this and hob from exisiting supply