Are undersized awg charger cables a fire hazard?

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Old 02-13-17, 04:49 PM
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Are undersized awg charger cables a fire hazard?

Will it just charge slower or is it a fire hazard?

Know where I can get heavy duty micro usb cables that are 22awg or so? All I can ever find is 28 awg and that's apparently too small for tablets and bigger phones....
 
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Old 02-13-17, 04:53 PM
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I did a search for #22 cables and found a stack of hits.

amazon/Sabrent-6-Pack-Premium-Micro-Cables-CB-U631
 
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Old 02-13-17, 05:15 PM
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I've got 22 awg that have excellent reviews but they are not "heavy duty" like I'm looking for. Thus, I asked for anyone who's tried some 22 awg that are heavy duty that they would recommend. Those don't look heavy duty or are indicated as such as far as I see.
 
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Old 02-13-17, 05:22 PM
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Upon reading the reviews, they are reported as heavy duty. Thank you.
 
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Old 02-13-17, 06:34 PM
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Upon further searching..... there are even #20 type cables available too.
Those would be even heavier duty.
 
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Old 02-14-17, 06:09 AM
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I found this chart that shows how gauge, length and current draw affect the voltage drop.



The full article is here.
 
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Old 02-14-17, 07:21 AM
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I bench tested a fist-full of micro-USB cables and found current capacity was all over the map, even at the same length. I wouldn't worry about a fire hazard--they don't get hot in use, they just have too much resistance to pass the necessary current. I did this test after I found that my phone would actually LOSE charge on a car trip when plugged in to the dash, if I was streaming music or using GPS.
For top current and fastest charging you do need thicker gauge cable specifically labeled as high-current charging cords. The ones linked earlier look good.

I also found many OEM and aftermarket charging adapters don't output what the label claims.

 
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