The mains voltage is 230 V, and the heater has a power of 2000 W. A 5 A fuse is fitted in the lighting circuit. Four fuses with different ratings are available for the heating circuit, as listed below. Underline the most suitable fuse value for the heating circuit fuse, then explain your choice. Your answer must include a calculation. fuses available: 5 A, 8 A, 13 A, 30 A
Describe what a fuse does when the current becomes too large.
Calculate the current in the lighting circuit fuse when all three lamps are switched on.
In Fig. 6.1, the lighting circuit fuse is rated at 5 A. The type Q lamp is removed from the circuit. Calculate the greatest number of extra lamps of type P that can now be connected in parallel to the lighting circuit.
In some houses, the lighting circuit is protected by a trip switch (circuit breaker) instead of a fuse. State two advantages of using a trip switch instead of a fuse.