You can no longer post new replies to this discussion. If you have a question you can start a new discussion
Two high-power appliances on a single 40A RCD
Former Community Member
I have an electric shower installed on a 40A RCD, in a room adjacent to my kitchen. The shower is only used in an emergency - i.e. when our gas boiler is unable to provide hot water to our main bathroom. I would like to take a spur from this 40A connection to use for a new double oven, which is rated at 32A. Can anyone advise on a safe and legal way to do this, ensuring that only one of the two appliances can be connected at any one time?
In the past if someone said that they were having a double oven most electrical practitioners and kitchen fitters assumed it would be 4.8 kW and draw a maximum of 20 amps and go from there, installing it on a 20 amp MCB and a suitably rated circuit, which can be 2.5 mm though generally it would end up as 6.0 mm, though 2.5 mm or 4.0 mm can be okay depending on the installation method.
The last few years many of the manufacturers have started telling people they need 6.0 mm circuits with a 32 amp MCB for ovens rated below 4.8 kW, so like for like swaps don’t comply with the manufacturers instructions in many instances.
I double checked the rating of your oven On another website and that says 4.0 kW as well on a 32 amp MCB
And you will have to forgive me for doing a simple Ohms Law calculation to calculate the amperage, despite it not being a D.C. current, you can have a go at the calculation Here on Rapidtables
In the past if someone said that they were having a double oven most electrical practitioners and kitchen fitters assumed it would be 4.8 kW and draw a maximum of 20 amps and go from there, installing it on a 20 amp MCB and a suitably rated circuit, which can be 2.5 mm though generally it would end up as 6.0 mm, though 2.5 mm or 4.0 mm can be okay depending on the installation method.
The last few years many of the manufacturers have started telling people they need 6.0 mm circuits with a 32 amp MCB for ovens rated below 4.8 kW, so like for like swaps don’t comply with the manufacturers instructions in many instances.
I double checked the rating of your oven On another website and that says 4.0 kW as well on a 32 amp MCB
And you will have to forgive me for doing a simple Ohms Law calculation to calculate the amperage, despite it not being a D.C. current, you can have a go at the calculation Here on Rapidtables
