Can I connect the oven to a wall outlet without grounding?
I'm going to make the installation of an oven in Khrushchev. I read your article on connecting the oven https://our.electricianexp.com/en/prostaya-ustanovka-elektricheskogo-duxovogo-shkafa-v-tri-etapa.html. You say that in the outlet necessarily need grounding. There is no grounding in the floor shield of Khrushchev. What do you think? Is it worth it to completely abandon the oven? Or can you put a diffavomat, for example, C20A with a leakage current of 30 mA (I have a VVG cable ng 2x4 mm2) and at least it will protect it for how much? Thanks in advance for your reply!
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1. First you need to know the power of the oven, since it will depend on you to put an ordinary outlet on 16A or power on 32 amperes, or if the oven is very powerful then the power outlet may not be enough for 32A, the cable is then connected directly to the terminals.
2. It is better to stretch the three-wire cable and if you install a socket it is also grounded, since today there is no grounding riser in the entrance, and tomorrow it may appear, and the wire can always be connected to a new ground.
3. You can put a difavtomat on the oven, this protection has already surpassed much protection with a grounding wire. By connecting even to a two-wire cable, you can be sure that the difavtomat will protect a person from accidental current leaks to the human body.
4. The differential machine is selected by the cross-section of the wire, and the cross-section of the wire is selected by the load of the oven. If its power is up to 4.6 kW (21 Amps), then the wire needs VVG 2 * 2.5 mm or VVG 3 * 2.5 mm