How do I know which RCD I need to use and what method of selection and installation is required? Today, Nong Quick has some good information to share. Let’s go see.

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Selection recommendations
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– Has the TIS mark: If there is a mark, it is considered to have been produced and tested according to industrial product standards (TIS) No. 909-2548 (RCBO) or TIS 2425-2552 (RCCB).
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– Choose by type:

1. RCBO is used to cut off leakage, overload, and short circuit. It can be used in place of a circuit breaker if used as a main switch. It is often used in cases where you want a leakage circuit breaker to cover the entire house.
2.RCCB is used only to cut leakage current, so it must be used in conjunction with a fuse or circuit breaker. It is often used on a case-by-case basis, such as only for water heater circuits.
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– Must not exceed 30mA: The rated leakage current must not exceed 30mA and the power can be cut off within 0.04 seconds when there is a leakage of 5 times the rated current (=150mA).

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Installation recommendations
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– Must be installed together with the ground wire: The ground wire will help conduct leaking electricity. Flows into the ground without causing harm to people who touch the equipment. and helps the device protect against overcurrent/leakage current. Able to work efficiently
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– Installed near the main switch panel. In case you already have a main switch panel and want to install an additional RCD, you can use both RCBO and RCCB leakage circuit breaker. It is recommended to install it near the main switch panel.
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– Test usage after installation: When installing, test functionality by pressing the test button. If the switch stem falls off, it is considered normal operation and should be inspected at least twice a year or as recommended by the manufacturer.

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Cr : Provincial Electricity Authority PEA