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Range Cooker Connection Refusal.

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A lady today asked me to estimate to do some cooker circuit alterations in her house. She has an old electric range cooker in the kitchen which she is to replace with a new one rated at about 11.2kW.

 

A certain national electrical retailer would not connect up her new and paid for range cooker as the cooker supply is run in 10.00mm2 T&E and protected by a B50 M.C.B. plus R.C.D.

 

The reason given was that the supply is too big and will overload the new cooker.

 

The retailer insisted that the  B50 M.C.B. be replaced by a B40 M.C.B. and the final cooker connection from connection unit to cooker, be run in 6.0mm2, the 10.002 final connection being removed.

 

Comments please.

 

Z.

 

 

 

 

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    davezawadi (David Stone): 
     

    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.

    Nonsense. According to this, even for a new circuit or new build, the customer has to pay for two breakers (the one specified by David in the appliance, and the one required by BS 7671 and common-sense at the CU) and potentially larger cable where selectivity is required … looks like that could turn into ill thought-through legislation or guidance.

    The circuit should be arranged to suit the load, not some arbitrary assumptions.

    It's like saying that everything connecting by BS 1363 FCUs should be capable of being protected by a 13 A fuse because that's what most new BS 1363 FCUs come with …

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  • 0

    davezawadi (David Stone): 
     

    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.

    Nonsense. According to this, even for a new circuit or new build, the customer has to pay for two breakers (the one specified by David in the appliance, and the one required by BS 7671 and common-sense at the CU) and potentially larger cable where selectivity is required … looks like that could turn into ill thought-through legislation or guidance.

    The circuit should be arranged to suit the load, not some arbitrary assumptions.

    It's like saying that everything connecting by BS 1363 FCUs should be capable of being protected by a 13 A fuse because that's what most new BS 1363 FCUs come with …

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