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Rcbo install like this, I think I kena upcar
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TSPain4UrsinZ
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 Aug 11 2023, 03:18 PM, updated 3y ago
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I requested for RCBO for my water heater, but this is the outcome, I'm trying to understand from the contractor but he say very complicated,explain also I don't know What I see from here I FEEL it is very weird, the My kitchen hood and one of the aircond is connected to RCBO and 25A ELCB instead of water heater. When I turn off or trip off the 25A ELCB with test button ,the power running for kitchen hood and one aircond , only turn off when I press test button on the RBCO or turn off the main switch. What actually went wrong? *Typo, one is 63A , another is 40A ELCB, connected with RCBO one both is 25A     This post has been edited by Pain4UrsinZ: Aug 11 2023, 03:31 PM |
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TSPain4UrsinZ
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Aug 11 2023, 04:17 PM
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QUOTE(jio @ Aug 11 2023, 03:59 PM) The 2 Himel 10ma RCCBs seems to be wired incorrectly and serve no purpose. It could be done so on purpose to bypass the RCCB by the contractor because there are shared neutrals between the circuits and they are too lazy to fix it. I doubt they are that retarded to so by mistake. So they contractor not only bluff me about RCBO but also make my 10mA rccb become dummy? My water heater is now just connecting directly with MCB? This post has been edited by Pain4UrsinZ: Aug 11 2023, 04:18 PM |
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TSPain4UrsinZ
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Aug 11 2023, 05:12 PM
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QUOTE(jio @ Aug 11 2023, 03:59 PM) The 2 Himel 10ma RCCBs seems to be wired incorrectly and serve no purpose. It could be done so on purpose to bypass the RCCB by the contractor because there are shared neutrals between the circuits and they are too lazy to fix it. I doubt they are that retarded to so by mistake. Wouldn't it be more easy and straight forward for them to just connect the water heater to RCBO? Why they seems like put more effort to do so many pattern and bluff me? This post has been edited by Pain4UrsinZ: Aug 11 2023, 05:14 PM |
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TSPain4UrsinZ
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Aug 11 2023, 10:33 PM
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QUOTE(jio @ Aug 11 2023, 06:50 PM) If the water heater is sharing neutral with other circuit (as in 2 MCB sharing same neutral cable), it will trip due to current imbalance if it is wired to the RCCB or RCBO normally. To fix this usually have to pull 1 or 2 new cables depending on how it was 'shared' in the first place. If the water heater is under shared circuit, just pull new cables for L + N to water heater especially if it was smaller than 4mm². Just make sure the old cables dismantled properly and not exposed. this is the original one before the contractor me to add more point and rcbo. originally 2 water heater are connecting to 2 separate elcb and mcb, can this prove that it is using differen neutral ?  |
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TSPain4UrsinZ
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Aug 12 2023, 09:05 PM
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QUOTE(stormer.lyn @ Aug 12 2023, 08:49 PM) This wiring is correct (.....well except for the 2.5 mm² wires used. Should be 4 mm²) with each Water Heater protected by an MCB (in case of shorting) and an RCCB (10 mA sensitivity, in case of current leakage) Why did you install the additional RCBOs? Simply because I heard RCBO better Willing to spend money on this to make it safer then ppl just fkes it up This post has been edited by Pain4UrsinZ: Aug 12 2023, 09:08 PM |
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