I am trying to connect the electric oven of my new belling 941 range to the existing supply but it constantly trips the main consumer unit rcd. When I measure the resistance between neutral and earth it is only about 0.6 ohm which I think is why the rcd trips. Is this value correct? i.e. is the neutral connected to the earth inside the appliance? If so will I need to install another consumer unit without an rcd main isolator?