How many types of electrical system? Nowadays, electrical systems in homes bring convenience, whether it's fans, air conditioners, or televisions, they all rely on electricity. Therefore, we should have basic knowledge about electrical systems: how many types of electrical systems are there in homes, what type of electrical system is required in homes, and how many types of electrical systems are there? Let's get to know them.

Advantages and disadvantages of AC and DC power. Direct current (DC) is electricity that flows in only one direction, from the negative terminal of the power source, through electrical devices, and back to the positive terminal of the power source. Alternating current (AC) is electricity that flows in the reverse direction. That is, it has no polarity and constantly reverses direction.