Question

Describe domestic electric circuits.

Answer 1

• Household electric supply consists of 3 types of wire - live wire (red insulation cover), neutral wire (black insulation cover) and earth wire (green insulation cover).
• The potential difference between neutral and live wire is 220 V.
• In household circuit system, two types of circuit are used. One of 15 A for appliances with higher power ratings and the other of 5 A ratings for appliances with lower power ratings.
• In domestic circuit, various appliances are connected in parallel combination. This ensures that if one appliance is switched ‘on’ or ‘off’, the others are not affected.
• The earth wire is used as a safety measure, especially for those appliances that have a metallic body.