Range Cooker Connection Refusal.

This is ridiculous, why are some comments trying to justify the unjustifiable? This is another manifestation of the “Manufacturers Instructions” problem, or at least is likely to be. If the manufacturer wants the supply fused at some value, they should fit the MCB to the product, or a fuse. If the design is so bad as to need a 40A rather than 50A breaker it is fundamentally flawed and should not be offered for sale. This costs very little money, much less than demanding a particular supply configuration. The idea that a cable can be “too large” is simply daft, and fundamentally untrue. 

I find that manufacturers' instructions are less and less satisfactory by the week. They are often written for multiple countries, whose supplies differ, without any account taken of this. They are often “get out of jail” kinds of nonsense. Retail packed electrical accessories often say something like “refer to an electrician”, when not doing this is why they sell retail packed items! For major products, they are often worse, with comments like “caution hot surfaces, may cause serious burns” on a cooker! The same is written on some 6W LED lamps, they hardly get warm. As above, showers now seem to have strange instructions too. They try to specify a cable size, a breaker rating but do not mention the bonding requirements for bathrooms, or the cable installation method, and are based on 24/7 operation that cannot be sustained by the shower itself. They often require RCD protection which BS7671 may not. This is all very bad indeed.

This is ridiculous, why are some comments trying to justify the unjustifiable? This is another manifestation of the “Manufacturers Instructions” problem, or at least is likely to be. If the manufacturer wants the supply fused at some value, they should fit the MCB to the product, or a fuse. If the design is so bad as to need a 40A rather than 50A breaker it is fundamentally flawed and should not be offered for sale. This costs very little money, much less than demanding a particular supply configuration. The idea that a cable can be “too large” is simply daft, and fundamentally untrue. 

I find that manufacturers' instructions are less and less satisfactory by the week. They are often written for multiple countries, whose supplies differ, without any account taken of this. They are often “get out of jail” kinds of nonsense. Retail packed electrical accessories often say something like “refer to an electrician”, when not doing this is why they sell retail packed items! For major products, they are often worse, with comments like “caution hot surfaces, may cause serious burns” on a cooker! The same is written on some 6W LED lamps, they hardly get warm. As above, showers now seem to have strange instructions too. They try to specify a cable size, a breaker rating but do not mention the bonding requirements for bathrooms, or the cable installation method, and are based on 24/7 operation that cannot be sustained by the shower itself. They often require RCD protection which BS7671 may not. This is all very bad indeed.