There are only positive and negative 2 wires in the household wire. The plug of refrigerator and induction cooker is 3. How to connect the other wire?

There are only positive and negative 2 wires in the household wire. The plug of refrigerator and induction cooker is 3. How to connect the other wire?

China's existing household power supply is double line AC system, not DC power supply! So there is no "positive and negative" theory! But the so-called "fire, zero" line! As for the ground wire, the existing new buildings must be set according to the convention! But the old buildings rarely have! But the lightning protection into the ground wire is useful! In the conventional buildings, as long as the ground is not wet

What color are the positive and negative poles of the wire?

Generally, + is very red. - very blue or national color

How many kilowatts can 120 square cable bear at most

For example, with VV 3 + 1 cable laid in the air, its current carrying capacity is about 210a, which can drive 100kW load. If it is YJV 3 + 1 cable, it can reach 260a, which can drive 130kW load

How many kilowatts can a square wire bear?

If the power supply is 220 V, the current per kilowatt is about 5 A. if the power supply is 380 V, the load per kilowatt is about 2 A
Therefore, a 1 square line can use 2 kW load at most (in the case of 380V power supply). If it is 220 V, it can use 1 kW at most