cooker 13amp

[freddye]

Could someone please help? I have bought a Smeg cooker which is 13 amp rated (normal plug). How do I connect this oven to a 30amp socket on the wall? Many thanks for any advice.

 

[Steve]

you dont. it has a 13A plug for a reason. Describe this "30A socket". Is it in fact a flex outlet?

 

[seehig]

you dont. it has a 13A plug for a reason. and i think that says it all..ps. what is a 30A SOCKET again?

 

[cozycats]

I presume you mean a cooker connection point! you may add to this point a 2.5 t&e to connect a single skt for your oven, or even a double skt should you have a gas hob requiring an ign supply. Many wire single ovens straight into the cooker connection but via a skt or fused spur (recommended)is better.

 

[breezer]

I presume you mean a cooker connection point! you may add to this point a 2.5 t&e to connect a single skt for your oven, or even a double skt should you have a gas hob requiring an ign supply. Many wire single ovens straight into the cooker connection but via a skt or fused spur (recommended)is better.

so if what you say is true, you are saying that it is ok to protect a 2.5 mm cable with say aa 40A fuse?

 

[cozycats]

According to the regs it acceptable to take a fused spur from a 32a ring in 1.5mm!

 

[RF Lighting]

Why not replace the connection point with a socket outlet? no 2.5mm² to worry about then, and also no need to worry about how to connect your oven in to the supply.

 

[Adam_151]

so if what you say is true, you are saying that it is ok to protect a 2.5 mm cable with say aa 40A fuse?

Quite possibly yes, if the 2.5mm² is protected downstream with a device suitable to afford overload protection to it before any branches, then the 40A breaker will just needs to be providing short circuit and earth fault protection, the adiabatic equation can be used to check this, along with reading the I²t value at the measured pscc from the breaker data sheets (and same techneque for the earth, take the reading with all parralell paths in place, because you want the worst case *largest* current that will flow)

K²S² will give the maximum toleratured I²t, K factor of 115 for T&E
so

115² x 2.5² = 82,856

Quick example using MKs data:

http://www.twobeds.com/upload/userfiles/adam_151/mkbreakerisquaret.GIF (lifted from their datasheet) that it passes by a mile

A tighter situation might be found with the earth (particulaly in a TNCS installation)

115² x 1.5² = ~30k, which means you start to run into trouble when the fault current gets above about 3ka (though remembering that if the cable is on the end of a a thicker circuit, then that will attenuate the values to lower than those found at the db)

if you have the old cable with a 1mm cpc, the max fault current that you can have and still have a cable thats in one piece becomes even lower

Same principle as spurs one a RFC, except thats a standard design that you don't have to calculate (likewise the 1.5mm² cpc on a spur taking the current to blow the fuse in an earth fault on the spur without burning up) and you can use the adiabatic if you want to see if 2.5/1 complies in order to reuse it

[when the fault current gets up higher BS1361 fuses are sometimes a better bet, their I²t let through engery is more a less constant when you trip it fast enough that the heat can't disapate from it, as opposed to breakers that take a set amount of time to move contacts]

Hope this all makes sense Its getting late, and I'm not the best person in the world at explaining stuff