F
frarex
I am currently working on my kitchen and I am centralising the switches for all appliances (Fridge, 2 Ovens, Induction Hob, Hood, Dishwasher, Washing Machine, boiler and counter sockets) on a secondary switchboard.
In order to do that I am running a 6mm multi-thread cable from the main switchboard (with a circuit breaker of 100Amp) to a secondary switchboard (with a circuit breaker of 40Amp).
The 6mm cables I am using are FG7(O)R that are supposed to carry around 50 Amp.
1) The person that recommended this setting says that the 6mm cable is absolutely fine to feed the secondary switchboard and that 40 amp are enough for a normal use of the appliances in the kitchen without the circuit breaker jumping.
2) Because I want to get the electrics certified I spoke with an electrician and he told me that the 6mm cable is not enough and 40 Amp for the kitchen might not be enough. He is reccomending a 25mm cables from the primary switchboard to the secondary switchboard with earth on a 10mm cable coming form the main earth.
I got two concerns:
1. I am a bit puzzled, before I changed the kitchen I had two 2.5 mm cables going into the kitchen that were running a similar number of appliances therefore I thought that a 6mm multi-thread cable was actually oversized to run the appliances.
2. Are the 40 amp of the secondary switchboard circuit breaker enough for a normal use of the appliances in the kitchen considering that the induction hob at full capacity uses 28 amp and that I might run washing machine (13 amp) dishwasher (13 amp) oven (15 amp) at the same time without considering boiler and fridge that might start at any time?
To be honest 25mm cables seem a bit too big to feed the secondary switchboard... but will a 6mm cable be enough? What if I start using the secondary switchboard and I realise I need a 60 amp breaker instead of the 40amp one?
Any suggestion about what I should do and who is right?
Thank you for your answers and apologies if similar question have been posted before, I tried to search the forum but I could not find anything relevant.
In order to do that I am running a 6mm multi-thread cable from the main switchboard (with a circuit breaker of 100Amp) to a secondary switchboard (with a circuit breaker of 40Amp).
The 6mm cables I am using are FG7(O)R that are supposed to carry around 50 Amp.
1) The person that recommended this setting says that the 6mm cable is absolutely fine to feed the secondary switchboard and that 40 amp are enough for a normal use of the appliances in the kitchen without the circuit breaker jumping.
2) Because I want to get the electrics certified I spoke with an electrician and he told me that the 6mm cable is not enough and 40 Amp for the kitchen might not be enough. He is reccomending a 25mm cables from the primary switchboard to the secondary switchboard with earth on a 10mm cable coming form the main earth.
I got two concerns:
1. I am a bit puzzled, before I changed the kitchen I had two 2.5 mm cables going into the kitchen that were running a similar number of appliances therefore I thought that a 6mm multi-thread cable was actually oversized to run the appliances.
2. Are the 40 amp of the secondary switchboard circuit breaker enough for a normal use of the appliances in the kitchen considering that the induction hob at full capacity uses 28 amp and that I might run washing machine (13 amp) dishwasher (13 amp) oven (15 amp) at the same time without considering boiler and fridge that might start at any time?
To be honest 25mm cables seem a bit too big to feed the secondary switchboard... but will a 6mm cable be enough? What if I start using the secondary switchboard and I realise I need a 60 amp breaker instead of the 40amp one?
Any suggestion about what I should do and who is right?
Thank you for your answers and apologies if similar question have been posted before, I tried to search the forum but I could not find anything relevant.