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  2. 2020–21 Singapore circuit breaker measures - Wikipedia

    en.wikipedia.org/wiki/2020–21_Singapore_circuit...

    The 2020–21 Singapore circuit breaker measures were a stay-at-home order and cordon sanitaire implemented as a preventive measure by the Government of Singapore in response to the COVID-19 pandemic in the country on 7 April 2020. The measures were brought into legal effect by the Minister for Health with the COVID-19 (Temporary Measures ...

  3. COVID-19 pandemic in Singapore - Wikipedia

    en.wikipedia.org/wiki/COVID-19_pandemic_in_Singapore

    The COVID-19 pandemic in Singapore was a part of the worldwide pandemic of coronavirus disease 2019 caused by severe acute respiratory syndrome coronavirus 2 . The first case in Singapore was confirmed on 23 January 2020. Early cases were primarily imported until local transmission began to develop in February and March.

  4. Electrical wiring in North America - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring_in_North...

    Arc-Fault Circuit Interrupter (AFCI) protection is required to protect nearly all finished areas of a home with the exception of bathrooms. This device, which can be a circuit breaker or the first outlet on a circuit, is designed to detect hazardous electrical arcing in the branch circuit wiring as well as in cords and plugs.

  5. Mains electricity by country - Wikipedia

    en.wikipedia.org/wiki/Mains_electricity_by_country

    50 Hz. (1) Nominal grid voltage according to regulation is 230/400 V, [ 44] but in practice, equipment with 220/380 V is more commonly used. (2) Types C and F plugs are officially recognized by SNI 04-3892.1.1-2003. (3) British Type G sockets are common in Riau Islands due to their close proximity to Singapore.

  6. Circuit breaker - Wikipedia

    en.wikipedia.org/wiki/Circuit_breaker

    A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by current in excess of that which the equipment can safely carry ( overcurrent ). Its basic function is to interrupt current flow to protect equipment and to prevent fire. Unlike a fuse, which operates once and then must be replaced, a ...

  7. COVID-19 lockdowns by country - Wikipedia

    en.wikipedia.org/wiki/COVID-19_lockdowns_by_country

    The 2020–21 Singapore circuit breaker measures were a stay-at-home order and cordon sanitaire implemented as a preventive measure by the Government of Singapore in response to the COVID-19 pandemic in the country on 7 April 2020.

  8. CB - Wikipedia

    en.wikipedia.org/wiki/CB

    Cannabinoids, a group of substances that bind to animal cannabinoid receptors. Circuit breaker, an automatic electrical switch designed to protect an electrical circuit from damage caused by overcurrent. Columbium (Cb), an obsolete name for the element niobium. Conduction band of the electrons in a ( semiconducting) solid.

  9. Transient recovery voltage - Wikipedia

    en.wikipedia.org/wiki/Transient_Recovery_Voltage

    A transient recovery voltage ( TRV) for high-voltage circuit breakers is the voltage that appears across the terminals after current interruption. It is a critical parameter for fault interruption by a high-voltage circuit breaker, its characteristics (amplitude, rate of rise) can lead either to a successful current interruption or to a failure ...