Explanation:

When the main switch of the house circuit is put off, it disconnects both the live and neutral wires. This is because the main switch is designed to cut off the flow of electricity from the power source to the electrical system in the house.

Live Wire:
The live wire, also known as the phase wire or hot wire, carries the electrical current from the power source to the electrical appliances and devices in the house. It is typically colored brown or red. When the main switch is turned off, it interrupts the flow of electricity through the live wire, effectively disconnecting it.

Neutral Wire:
The neutral wire, also known as the return wire, provides a path for the electrical current to return back to the power source. It is typically colored blue. When the main switch is turned off, it also disconnects the neutral wire, cutting off the return path for the electrical current.

Earth Wire:
The earth wire, also known as the grounding wire, is a safety measure to protect against electrical faults. It provides a path for the electrical current to flow into the ground in the event of a fault, preventing electric shock. The earth wire is typically colored green or yellow. However, when the main switch is turned off, it does not disconnect the earth wire. The earth wire remains connected to the electrical system to provide continuous protection against electrical faults.

Conclusion:
In conclusion, when the main switch of the house circuit is put off, it disconnects both the live and neutral wires. This ensures that there is no flow of electricity from the power source to the electrical system in the house. The earth wire, on the other hand, remains connected to provide continuous protection against electrical faults.