Unsure if my hob wiring needs upgrading

[n0v1ce1]

I have an old Hotpoint solid plate hob that I am considering replacing. The wiring was done when the kitchen was installed.

The existing wiring is 3 core (red/live, black/neutral, and earth). I think it is 4mm copper. The wires are 5mm incl the covering.

Most new hobs I see require 30/32 A 'fuse rating. Looking on internet I am unsure whether my existing wiring is appropriate for that.

 

[AndyPRK]

In your fuse box / consumer unit. What is the rating of the device which is marked hob or cooker ?

 

[JohnW2]

The existing wiring is 3 core (red/live, black/neutral, and earth). I think it is 4mm copper. The wires are 5mm incl the covering.

Are you talking about the approximate diameters of the red & black cores (including the insulation)?

Kind Regards, John

 

[n0v1ce1]

In your fuse box / consumer unit. What is the rating of the device which is marked hob or cooker ?

When I first checked my fuse box I was a bit confused but can now see the hob/cooker has a 30A fuse so I should be OK for quite a few new hobs.

Are you talking about the approximate diameters of the red & black cores (including the insulation)?

Kind Regards, John

Yes I was. I turned the power off and measured the diameter of the wire.

 

[JohnW2]

In your fuse box / consumer unit. What is the rating of the device which is marked hob or cooker ?

When I first checked my fuse box I was a bit confused but can now see the hob/cooker has a 30A fuse so I should be OK for quite a few new hobs.

Fair enough.

Are you talking about the approximate diameters of the red & black cores (including the insulation)?

Yes I was. I turned the power off and measured the diameter of the wire.

In that case, it's a pretty hefty cable, more than man enough for a 30A circuit.

Kind Regards, John

 

[EFLImpudence]

It'll be 6mm² and fine for whatever you buy.

 

[n0v1ce1]

It'll be 6mm² and fine for whatever you buy.

Thanks for all the replies - I should have remembered my Pi R squared

 

[JohnW2]

It'll be 6mm² and fine for whatever you buy.

Thanks for all the replies - I should have remembered my Pi R squared

That's right. The bundle of copper strands in a 6mm² is around 3mm in overall diameter, from which πr² becomes 6mm². Add around 1mm of insulation 'all around' and that gives you the ~5mm overall diameter which you measured. As said, that's more than adequate for any cooker.

Kind Regards, John

 

[ban-all-sheds]

Yes I was. I turned the power off and measured the diameter of the wire.

http://www.diynot.com/wiki/electrics:flatpvccables