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RCCB Typeb 2p 4p Residual Current Circuit Breaker with 63A 300mA 240V

RCCB Typeb 2p 4p Residual Current Circuit Breaker with 63A 300mA 240V
Residual current circuit breakers (RCCBs) This device is essentially a  attached to it. So basically it will only break...

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