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Comment on Why is daisychaining multiple extension cords considered unsafe, even if only done to the length of a standard cable?

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ArbitraryValue@sh.itjust.works ⁨2⁩ ⁨weeks⁩ ago

I don’t think you’re right about heat. Two cables in series have double the resistance and therefore double the total heat generation, but that heat energy is split between the two cables so each one does not get hotter than if it was the only cable.

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fmstrat@lemmy.nowsci.com ⁨2⁩ ⁨weeks⁩ ago
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Current and Voltage don’t change, but resistance does (between cable types)?

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- Aqarius@lemmy.world ⁨2⁩ ⁨weeks⁩ ago
  What are you talking about? Current absolutely changes! Your own formula requires I=V/R
  
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  - fmstrat@lemmy.nowsci.com ⁨2⁩ ⁨weeks⁩ ago
    My mispeak there was voltage.
    
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- kevincox@lemmy.ml ⁨2⁩ ⁨weeks⁩ ago
  Yes, you will have double heat output due to twice the resistance which causes twice the voltage drop and more or less the same current. But this heat output is spread across twice as much wire, so unless the extension cables are coiled together on the ground each will heat up the same amount as a single one would.
  
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  - fmstrat@lemmy.nowsci.com ⁨2⁩ ⁨weeks⁩ ago
    These changes are not linear with extension cords, as the gauge variance is less than changes in length. 100% longer doesn’t mean 100% thicker. Also the heat does not just occur in the wire. Whatever is at the end of that cord has to work harder due to the voltage drop, and harder means hotter.
    
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