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Mains electricity

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Question 19

A washing machine rated at 2.4 kW is connected to the standard UK mains supply (230 Vrms230\text{ V}_{\text{rms}}230 Vrms​, 50 Hz).

Which option correctly identifies:

  1. The standard domestic plug fuse rating (3 A, 5 A, or 13 A) required for safe operation.
  2. The peak fault current that flows to earth if a fault causes the live wire to make direct contact with the metal casing (connected to earth via a wire of resistance 0.80 Ω).

Fuse rating = 13 A13\text{ A}13 A; Peak fault current = 410 A410\text{ A}410 A

Fuse rating = 13 A13\text{ A}13 A; Peak fault current = 290 A290\text{ A}290 A

Fuse rating = 5 A5\text{ A}5 A; Peak fault current = 410 A410\text{ A}410 A

Fuse rating = 5 A5\text{ A}5 A; Peak fault current = 290 A290\text{ A}290 A

Mains electricity Questions

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