- Joined
- 8 Feb 2008
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- 435
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- Country
Oh what fun, another battle of: it says this; no it says that; or it really means this. 
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First the electrical principles - always a good place to start.
So I assume we have an existing 32A radial circuit. We now wish to connect cooking appliances with a total load of 6600 + 2400 = 9000 watts which at 230 volts means a maximum possible current flow of 39A.
Can a 32A circuit supply this load without damage - in a domestic environment it is unlikely that all of the load will be demanded at once, and even if it is the thermostatic controls will soon start to operate thus reducing the thermal load on the circuit. So unless there is some unknown factor, this arrangement should be adequate.
Does the circuit need overload protection - quite simply no. It cannot produce an overload so 433.3.1 (ii) applies.
Can one radial supply two appliances - yes.
So from an electrical principles point of view - do we have a problem - no.
Now the fun part
First we have not been given sight of the manufacturer's instruction so we don't actually know what they say. It may be something like - this appliance must be installed by an electrician.
Why have they fitted a plug - well probably to avoid some perceived risk of prosecution under 'The Plugs and Socket etc. (Safety) Regulations 1994' (you can find them on the web). Part II is applicable here - they may be concerned about Regulation 12 - basically this appear to say that any appliance rated at > 200 volts and < 13A should have a 13A plug on it.
Now I am not going to try and second guess a courts view on that lot, but many manufacturers fit plugs because it avoids any later problems with Trading Standards inspectors.
So do we have to comply with manufacturer's instructions - well it depends what they are. If a misguided manufacturer gave instructions that would cause danger, would you have to comply - well your honour - they told me I had to do it (I have heard that defence before somewhere).
What about 134.1.1 - I'll raise that - what about 120.3.
Have fun.
.First the electrical principles - always a good place to start.
So I assume we have an existing 32A radial circuit. We now wish to connect cooking appliances with a total load of 6600 + 2400 = 9000 watts which at 230 volts means a maximum possible current flow of 39A.
Can a 32A circuit supply this load without damage - in a domestic environment it is unlikely that all of the load will be demanded at once, and even if it is the thermostatic controls will soon start to operate thus reducing the thermal load on the circuit. So unless there is some unknown factor, this arrangement should be adequate.
Does the circuit need overload protection - quite simply no. It cannot produce an overload so 433.3.1 (ii) applies.
Can one radial supply two appliances - yes.
So from an electrical principles point of view - do we have a problem - no.
Now the fun part
First we have not been given sight of the manufacturer's instruction so we don't actually know what they say. It may be something like - this appliance must be installed by an electrician.
Why have they fitted a plug - well probably to avoid some perceived risk of prosecution under 'The Plugs and Socket etc. (Safety) Regulations 1994' (you can find them on the web). Part II is applicable here - they may be concerned about Regulation 12 - basically this appear to say that any appliance rated at > 200 volts and < 13A should have a 13A plug on it.
Now I am not going to try and second guess a courts view on that lot, but many manufacturers fit plugs because it avoids any later problems with Trading Standards inspectors
.So do we have to comply with manufacturer's instructions - well it depends what they are. If a misguided manufacturer gave instructions that would cause danger, would you have to comply - well your honour - they told me I had to do it (I have heard that defence before somewhere
).What about 134.1.1 - I'll raise that - what about 120.3.
Have fun
.
