This discussion is locked.

You cannot post a reply to this discussion. If you have a question start a new discussion

Range Cooker Connection Refusal.

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.

Parents

0 wallywombat over 3 years ago

gkenyon:

Ideally, manufacturers should be specifying a range, e.g. 32A-50A, to cover maximum demand (low end), and the capacity of the terminals + the internal wiring to those terminals (high end).
Why? We are talking about fixed appliances that have a dedicated circuit. It could well be that you move up from an oven requiring 25 A to a new appliance requiring 32 A … that may need new cables run? What's the issue here? Whatever range you choose, the next appliance may well not fit that.
The point I was trying to make is that every appliance, by the nature of its design, will have a range of CB ratings that it can comfortably and safely work with. If the manufacturer tells us this info, it gives us maximum flexibility. For example, if an appliance is specified as needing a 32-50A CB, then we can wire it to an existing 40A circuit without changes. If the manufacturer just says “must use a 25A breaker” then the circuit has to be modified, or an an extra circuit added, before the appliance can be added. Which is annoying, as one might suspect that it would actually be ok with a 40A breaker too, if only the manufacturer would tell us!
Cancel
Vote Up 0 Vote Down

Cancel

Reply

0 wallywombat over 3 years ago

gkenyon:

Ideally, manufacturers should be specifying a range, e.g. 32A-50A, to cover maximum demand (low end), and the capacity of the terminals + the internal wiring to those terminals (high end).
Why? We are talking about fixed appliances that have a dedicated circuit. It could well be that you move up from an oven requiring 25 A to a new appliance requiring 32 A … that may need new cables run? What's the issue here? Whatever range you choose, the next appliance may well not fit that.
The point I was trying to make is that every appliance, by the nature of its design, will have a range of CB ratings that it can comfortably and safely work with. If the manufacturer tells us this info, it gives us maximum flexibility. For example, if an appliance is specified as needing a 32-50A CB, then we can wire it to an existing 40A circuit without changes. If the manufacturer just says “must use a 25A breaker” then the circuit has to be modified, or an an extra circuit added, before the appliance can be added. Which is annoying, as one might suspect that it would actually be ok with a 40A breaker too, if only the manufacturer would tell us!
Cancel
Vote Up 0 Vote Down

Cancel

Children

No Data

Range Cooker Connection Refusal.

Community Rules & Guidelines