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    An electric heater is rated 2200 W at 220 V. The minimum rating of the fuse wire to be connected to the device is:
    Question

    An electric heater is rated 2200 W at 220 V. The minimum rating of the fuse wire to be connected to the device is:

    A.

    20 A

    B.

    5 A

    C.

    10 A

    D.

    22 A

    Correct option is C

    Given:

    Power (p) = 2200w

    Voltage(v) = 220 v

    Formula used:

    I = PV\frac{P}{V}

    Solution:

    I = 2200220\frac{2200}{220}

    I = 10A

    The fuse must have a slightly higher rating than the current drawn to avoid unnecessary tripping during normal operation.
    Thus, the minimum fuse rating for this device should be 10 A

    The minimum rating of the fuse wire is

    10 A.​

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