This is a question that confuses many, especially those who are just beginning to learn about electricity.
Should heating element have high resistance or low resistance? Before that, follow me, here is the basic understanding.
Q) What are the possible fault in electrical appliances?
The fault could be due to:
- Conductors (e.g. wires, terminals, components) at hot or near full mains potential breaking, bending or detaching and touching the casing of the appliance
- Breakdown of insulation. For instance, insulation on cores of the power flex could become damaged inside an appliance or insulating spacers could become dislodged. Also, metal parts such as screws or nuts which have come undone could bridge the gap between hot and the metal casing
- Making contact with a power cable when drilling through a wall
Q) What is a hot / live wire?
Current flows out from source through this wire to an appliance.
Q) What is a neutral wire?
The neutral wire is at a voltage close to or equal to ground. Current which flows to an appliance via the hot wire returns via the neutral core in a cable
Do take note of the difference between earth wire, neutral wire, grounding too 🙂