ovens again more bloody ovens

[tom1]

any one fitted AEG b41015m multifunction oven

not got instruction yet so had a look on line and it say 16 amp fuse, oven and grill max power 3.5/2.9 kw connected load 3.5 kw

http://www.aeg-electrolux.co.uk/Files/united_kingdom_english/AEGCategoryImages/BI%20Specification%20Tables.pdf

closes manual i can find says 15 amp fuse min and 20 max

http://www.manualshark.org/manualshark/files/5/pdf_9989.pdf

every, single oven i have fitted has been around 2.2 kw

never more than 13a fuse

 

[kme]

Wellll:

3.5 KW is >13A, ain`t it?

The 20A max is prob the internal wiring rating spec; so I`d go for a 16A radial supply, if it were me....

I wouldn`t want to lump that load onto an existing ring.....bit big.

KME

 

[tom1]

Wellll:3.5 KW is >13A, ain`t it?

The 20A max is prob the internal wiring rating spec; so I`d go for a 16A radial supply, if it were me....

I wouldn`t want to lump that load onto an existing ring.....bit big.

KME

more like 15 A mate.

there is a cooker circuit in place so i though of swaping out for a 16 or 20 amp mcb. but i want t stick a built in microwave on there aswell.

also if it was a 13 amp job then i though of having it as a A2 radial and put the plinth heater 2 KW on there as well save the ring a bit.

 

[kme]

Could put a small "sub-board" in (if you have the space), to provide for your altered requirements on the existing final cct (basically turning the cooker cct into a sub-main) - then you could appropriate the loads as you describe......

KME

 

[tom1]

Could put a small "sub-board" in (if you have the space), to provide for your altered requirements on the existing final cct (basically turning the cooker cct into a sub-main) - then you could appropriate the loads as you describe......KME

not a bad shout, may be find a space in one of the units

thanks

 

[tom1]

another thought is can you get a 15 - 20A fused outlet?

 

[sparkytim]

You say there is an existing cooker circuit this oven will be connected on to.

What cable size and circuit protection does this have?

A 6mm on 32 A mcb will provide adequate protection for this oven.

It is good practice to size the Protective device down to load connected however no overload protection is required for a fixed load as per BRB pg 74 433.3.1

Just think, if this oven and a Hob were in the same enclosure i.e. a standard Cooker, then no further Protective device would be in circuit just for the Oven.

A Cooker circuit can serve two appliances as long as both are within 2 mtrs of the Cooker switch and again you would not have seperate Protective device for each cooker.

 

[initforthemoney]

The protective device is not there to protect the appliance, so a 6mm 32A should be perfectly ok.

 

[tom1]

You say there is an existing cooker circuit this oven will be connected on to.What cable size and circuit protection does this have?

A 6mm on 32 A mcb will provide adequate protection for this oven.

It is good practice to size the Protective device down to load connected however no overload protection is required for a fixed load as per BRB pg 74 433.3.1

Just think, if this oven and a Hob were in the same enclosure i.e. a standard Cooker, then no further Protective device would be in circuit just for the Oven.

A Cooker circuit can serve two appliances as long as both are within 2 mtrs of the Cooker switch and again you would not have seperate Protective device for each cooker.

so why put 20A max fuse in the instructions? have had this befor in other single oven normally get round this with an fcu.

 

[sparkytim]

As mentioned good practice to fuse down to actual Load, so Minimum 15 Amp and max 20 Amp recommended for just that Oven.

As designer of the installation then you decide if adequate protection will be given by what you decide to install.

 

[tom1]

options then.

wire both oven and combi micro leave on 32

down size to a 20 or 16

and stick plinth heater and micro on the ring.

may be leave both micro and oven on a 20.

or have 6mm 32A submain and stick one of these in a unit with a 16 and 20

http://www.screwfix.com/search.do?_dyncharset=UTF-8&fh_search=46968

 

[batty]

options then.wire both oven and combi micro leave on 32

down size to a 20 or 16

and stick plinth heater and micro on the ring.

may be leave both micro and oven on a 20.

or have 6mm 32A submain and stick one of these in a unit with a 16 and 20

http://www.screwfix.com/search.do?_dyncharset=UTF-8&fh_search=46968

Only if you have RCD protection somewhere else or cables are in conduit or the like and not tt system.

 

[tom1]

yer the 32 is on the rcd

 

[initforthemoney]

And again, the MCB is NOT there to protect the appliance.

32A MCB on a 6mm radial is fine. All you need to do is install a suitable means of isolation for the connected appliances.

 

[tom1]

And again, the MCB is NOT there to protect the appliance.32A MCB on a 6mm radial is fine. All you need to do is install a suitable means of isolation for the connected appliances.

yes mate i take your point about ommiting overload protection

and the easy and cheapest rout would be wire the micro and oven off the cooker circuit. bs7671 also says to follow manufactors instructions though

other options are being explored which cater for other appliances like the heater and just batting idears around really.

but if correct to do so then the existing circuit will be the likely option

 

[tom1]

And again, the MCB is NOT there to protect the appliance.32A MCB on a 6mm radial is fine. All you need to do is install a suitable means of isolation for the connected appliances.

after the post on the other thread then you would go with a 20 amp mcb mate?

 

[initforthemoney]

And again, you are missing the point. Mate.

If MCB's were designed to protect appliances and their flexible cables, why would there be fuses in plugs?

In this case, however, the manufacturers have recommended the circuit is protected with a 20A MCB, as there is no internal protection on it.

 

[Chr!s]

Tom

not got instruction yet so had a look on line and it say 16 amp fuse, oven and grill max power 3.5/2.9 kw connected load 3.5 kw

Tom if the manufactures ask for a 16 a fuse then that's what's needed.

And again, the MCB is NOT there to protect the appliance.

32A MCB on a 6mm radial is fine. All you need to do is install a suitable means of isolation for the connected appliances

Id disagree, if they want 16 amp theres a reason, its also there to protect the cable within the equipment also.

yes mate i take your point about ommiting overload protection

and the easy and cheapest rout would be wire the micro and oven off the cooker circuit. bs7671 also says to follow manufactors instructions though

Although dependant upon your final design you may decide to omit overload protection, you still need to provide fault current protection, many cookers use aluminium conductors instead of copper, the energy let through of a 32 a mcb may be to great for cables inside the appliance.

I suggest you install to the manufactures instructions, as you said, there are reasons

Regards chris