I know that in electrical grid, Neutral wire is a non current carrying conductors so its cross section area is smaller than the cross section area of the live conductors. I think it has half of size of the live conductor.
Is this rule valid for a department or a small home that uses 1 phase only? If I'm buying the neutral cable for a home, Should it be less that or equal live wire ?
My country does not have grounding system. The wall outlets have two ports only (220V / 50Hz). But the neutral of distribution transformers is grounded.