[Solved] Voltage Absence in B25 Overcurrent Circuit Breaker: A Look into 3-Phase Power Failure

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#31 17781266 16 Feb 2019 01:12

Eyemax Eyemax

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Post #31
17781266 16 Feb 2019 01:12

I replaced the C25 A circuit breaker behind the meter in the junction box with a new one. It was damaged by water, which got on the power cable through a leak in the box (at the place where the box was attached to the wall) - I sealed the box.
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Topic summary

The discussion revolves around a power failure affecting one phase of a B25 overcurrent circuit breaker in a residential setting. The user initially reported no voltage on one phase, despite the power company confirming voltage supply from the external power box. Subsequent measurements revealed fluctuating voltages, indicating potential issues with the circuit breaker or wiring. The user discovered water accumulation in the junction box, likely causing damage to the circuit breaker. After replacing the faulty C25 circuit breaker and sealing the box to prevent further water ingress, normal voltage levels were restored across all phases. The conversation highlights the importance of proper sealing and maintenance of electrical installations to prevent similar issues.
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