Wiring guide : 3 color wire (green, blue,black), Which one neutral, live and earth
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 May 30 2021, 11:27 AM
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#1
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Newbie
6 posts Joined: Oct 2008 From: Petaling Jaya  
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Hi, I am facing an issue of identifying which wire color label. I am attempting to upgrade my Storage Water Heater switch to to Sonoff tx wifi smart wall switch. There are three colors Red, Blue & Black.
  Sonoff TX Switch Manual: https://sonoff.tech/wp-content/uploads/2021....2-20210305.pdf Can anyone help me match the wiring to the diagram please.  This post has been edited by jskhoo: May 30 2021, 11:30 AM |
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May 30 2021, 11:50 AM
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#2
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Newbie
6 posts Joined: Oct 2008 From: Petaling Jaya
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QUOTE(slimey @ May 30 2021, 11:43 AM) you cant use that switch. Is it? max rated output only 2 amp. water heater takes much more than that.   What should be the power rating I need? Any suggestion of which Smart switch I would need for a storage water heater please? Thank you |
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Jun 1 2021, 10:22 AM
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#3
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Newbie
6 posts Joined: Oct 2008 From: Petaling Jaya
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QUOTE(ceo684 @ May 30 2021, 03:09 PM) 3kw water heater need a 20A DP (double pole L+N); Thanks for the advice and guide.Else u need to wire up a contactor instead if you want to use original switch. A contactor allows a kancil to control the operation of a trailer load. |
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Jun 1 2021, 08:43 PM
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#4
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Newbie
6 posts Joined: Oct 2008 From: Petaling Jaya
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QUOTE(jskhoo @ May 30 2021, 11:27 AM) Hi, I am facing an issue of identifying which wire color label. I am attempting to upgrade my Storage Water Heater switch to to Sonoff tx wifi smart wall switch. There are three colors Red, Blue & Black. Forgot to ask, could anyone help me identify which wire is Live(IN), Live(OUT), Neutral? Sonoff TX Switch Manual: https://sonoff.tech/wp-content/uploads/2021....2-20210305.pdf Can anyone help me match the wiring to the diagram please.  Thank you |
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Jun 2 2021, 08:35 PM
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#5
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Newbie
6 posts Joined: Oct 2008 From: Petaling Jaya
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QUOTE(ceo684 @ Jun 1 2021, 08:58 PM) Blue LINE (always ON regardless) Thanks so much for the clarification. and the black to its 3 o clock is N Red LOAD (switched ON/OFF) (based on LED). and the black to red 3 o cllck is N Confirm with test pen or multimeter because the previous installer is color blind. Never trust the colour. Bangla tarak wireman cert one. Yeah I agree that the person who worked on it obviously didn't do a correct job on the wiring. |
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