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Our regulations suggest any item which is not portable and over 2kW should not be plugged into the ring final as a general rule for domestic we only use 13A plugs although we have 16, 32, 63 amp plugs they are rarely used with domestic over 13A normally wired direct to what we now call a consumer unit (distribution unit type tested)
Yes as said in theroy dish washer, tumble drier, washing machine, oven, hob, all will have dedicated circuits, In practice only oven and hob use dedicated circuits.
As said we don't have standard plugs in domestic over 13A and we have a single phase not split phase or three phase in domestic property.
As said your system is very different.
Because we use a standard three phase or split phase step down transformer we also have a more standardised supply system it is very rare to take more than one phase into any house and we always have a neutral at earth polarity. With the USA system not sure if the same with Canada they have more earthing systems than we do in the UK and in some cases use delta supply transformers with a centre tap on one winding. This is unknown of in the UK all our supplies are from star wound or single phase transformers.
We are harmonised with Europe except for types of plug used and everything except for building site supply is 230 volt single phase or 400 volt three phase there are one or two exceptions for mines and quarries but the voltage and earthing is far more universal than in the USA. We got rid of our DC supplies well before USA and the higher voltage means less amps so less fires as a result of electric power.
I worked with USA systems in Algeria and Hong Kong and they scared the hell out of me. IT earth system in UK is only ever used for shaver supply. We have never use the USA wire gauge even before we went metric we did not use that system. AWG 8 means nothing to us. Before metric we used 7/0.029 which was 7 cores at 0.029 inches diameter with metric we went to cross sectional area rather than diameter in both cases simple maths can work out current carrying capacity we don't need a set of tables to convert the code into real sizes. We don't use 8.36mm² cable and when the number goes bigger it carries more current the idea of numbering in reverse seems alien to us.
In the UK nearly every domestic appliance other than cookers can be plugged into a 13A socket. As said we always use dedicated circuits for immersion heater, and should use dedicated circuits for a lot more but in an emergency every thing could be simply plugged in. And the fuse in the plug means NEMA 1 to 23 is simply not required. The Commando Industrial Plugs and Sockets are coloured for voltage and phases and are used in industrial premises but the only one seen by the man in the street is the 16A blue one used for caravans.
There is a 2A, 5A, and 15A socket but they are just historic a remnant from the past. The only reversible plug and socket is for shavers only.
And as said nothing about this has anything to do with the problem in question. Once we had facts it was plain the guy was completely out of order not installing the cooker.
