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Any recommended water heater brand?, mechanical RCD vs electronic RCD
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TSgoolie
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 Sep 13 2023, 11:23 AM, updated 3y ago
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Heard that the water heater operates on mechanical RCD (residual current device) is much safer than electronic RCD. Any good brand and model comes with mechanical RCD? Is it more expensive?
I just worried that the electronic one may malfunction which cause shower electrocution whereas mechanical one when tripped, the power is surely cut off. Is that true?
If not using the mechanical RCD one, what is the best practice before safely using water heater? How often do we need to press test button?
This post has been edited by goolie: Sep 13 2023, 11:24 AM
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TSgoolie
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Sep 13 2023, 09:57 PM
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QUOTE(lowyat101 @ Sep 13 2023, 08:39 PM) Personally I like the mechanical type, so I always use Panasonic one. Recently I need a rain shower type without built-in pump but Panasonic doesn't have this. So I got 1 from Joven which also comes with mechanical type. But haven't use it yet so can't comment much on it. I'm also interested in Joven. Can i know which model comes with mechanical type? |
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TSgoolie
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Sep 14 2023, 09:36 AM
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QUOTE(lowyat101 @ Sep 14 2023, 12:45 AM) How can we know it's mechamical coz it never stated in the spec? |
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TSgoolie
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Sep 14 2023, 10:05 AM
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QUOTE(lowyat101 @ Sep 14 2023, 10:59 AM) you can see from the picture, there's a small level for the reset. or go to those shops and check it out physically u mean the reset button as highlighted? Every water heater that comes with reset button will surely a mechanical one?  |
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TSgoolie
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Sep 14 2023, 10:24 AM
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QUOTE(Zot @ Sep 14 2023, 11:21 AM) I think if the reset is a button not push in mechanical, then the cutoff mechanism will not be mechanical but electronics. Not to be confused with Test button  How to differentiate push vs button? from the layout we can know? Do u have any good example? |
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TSgoolie
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Sep 14 2023, 11:23 AM
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QUOTE(Zot @ Sep 14 2023, 11:28 AM) I go to the Joven link provide and I see this picture. SO, it must be mechanical  When the Test button is pushed, the plastic level will jot out like in the picture I believe. [attachmentid=11479056] Ok, good. Do you know what is the purpose of 10mA(See this picture)? The seller send it to me and said all Joven model got this. Does it serve same purpose as mechanical RCD?  |
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TSgoolie
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Sep 14 2023, 12:51 PM
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QUOTE(ceo684 @ Sep 14 2023, 12:40 PM) Think of it this way ELCB = only jaga the front gate of a factory. If things go missing via the back gate nothing happens 
it only works if leakage goes through E line
if leak thru human, human is not E line 
whereas RCD (fitted inside the DB box) is like the airport screening machines.. no funny thing can happen. [attachmentid=11479060] Ok, RCD in DB box is airport screening machine ELCB jaga front gate of entrance Then how about mechanical RCD in water heater that we mentioned earlier? Why it has advantage than electronic RCD? This post has been edited by goolie: Sep 14 2023, 12:51 PM |
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TSgoolie
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Sep 14 2023, 01:03 PM
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QUOTE(ceo684 @ Sep 14 2023, 01:58 PM) Inside WH one, you must triple check and confirmsure that it is actually an RCD and not an ELCB. Personally I don't trust the WH people to put a good one in. I have no qualms running old WH (National since 1995), but on the RCD side I retrofitted in the 10mA (for WH) and whole house is using 30mA, can say double safety in the DB box. Well below the death-point of 50mA. Mechanical trip characteristics are more reproducible. Electronics fail too  I confirmed that it's ELCB. See the picture inside WH. So, it's not safety to use? Should I change my decision to Not To Buy?  |
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