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Forums › Home Workshop DIY › LED AC to DC transformer


327 posts

Ultimate Geek


# 181099 2-Oct-2015 11:28
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What would happen if a the power to an LED 240AC to 12v DC transformer was connected wrong way around . Would it cause any damage to the transformer ? Would it still operate, albeit not correctly wired ?

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Ged

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Uber Geek
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  # 1398597 2-Oct-2015 11:29
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You mean the mains in? If so nothing.



327 posts

Ultimate Geek


  # 1398850 2-Oct-2015 15:49
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Yep. New fancy led light for house. Several transformers in it and various options for lighting part or parts of it. Instructions in italian and a diagram 1inch by 1inch showing wires connected L to L and N to N inside a little plastic connector. Upon examining said plastic connector it has no markings on it and 2 black wires out one side that disappear into a bundle of heatshrink tubing alongwith several other wires. Sparky will install next week. I was just being curious tbh.

 
 
 
 


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  # 1398928 2-Oct-2015 17:16
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AC is just that. The polarity changes every 50 or 60 times a second so it doesn't matter which way it is connected. Only true if it really is designed for AC.




I don't think there is ever a bad time to talk about how absurd war is, how old men make decisions and young people die. - George Clooney
 

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  # 1399162 2-Oct-2015 22:51

Rikkitic: AC is just that. The polarity changes every 50 or 60 times a second so it doesn't matter which way it is connected. Only true if it really is designed for AC.





Exceptions are where the device contains a switch. And / or a "protection device" such as a fuse or circuit breaker. As you don't want the switch or protection device to be controlling the neutral.  And some gas appliances that have electronic flame sensing won't work if the phase and neutral get swapped over.





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  # 1399166 2-Oct-2015 23:13
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Good points.




I don't think there is ever a bad time to talk about how absurd war is, how old men make decisions and young people die. - George Clooney
 

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