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Old 09-10-2017, 11:39 AM   #1 (permalink)
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Default RJ11 using as power line?

Wondering if i can use safley RJ11 cabling to power devices which are 5v 12v, and if i can, what is the maximum number of devices>?
I have a RJ11 splitter which gave me the idea, of converting it in order to power some lights which i am putting in a casemod I think it would look cool cyberpunkish and i will have three extra ports that IU would use to recharge devices. yet I am not knowing the maximum power I RJ11 and connectors can handle.
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Old 09-10-2017, 07:08 PM   #2 (permalink)
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Default Re: RJ11 using as power line?

Wouldn't advise it.
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Old 09-10-2017, 07:10 PM   #3 (permalink)
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Default Re: RJ11 using as power line?

Why not. Long as it can supply 12v 3a I would be fine. I'm trying to do a cyberpunk case build. And it's either Rj11 which I have a ton of or RJ45 because I have older ports I can disassemble and turn in to power rails.
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Old 09-11-2017, 09:29 AM   #4 (permalink)
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Default Re: RJ11 using as power line?

Resistance. RJ11 is usually around 100 ohms. They typically carry 3 to 9 volts with 20-80mA. Upping the amps from 80mA to 3A would require a cable with far less resistance. When you put too much power in a cable that has high resistance the result is heat.

Why don't you perform a table test of what you're saying. Literally test it out. Electrical tape a thermometer to your RJ11 and run that current through it and watch your cable gain heat and potentially catch flames.
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Old 09-11-2017, 09:37 AM   #5 (permalink)
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Default Re: RJ11 using as power line?

So RJ45 is my best choice, a cat5E
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Old 09-11-2017, 09:44 AM   #6 (permalink)
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Default Re: RJ11 using as power line?

Lookup Ohms law and do the calculations yourself. Determine the resistance you need for the current you want to run and find a cable for that resistance.
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Old 09-11-2017, 01:26 PM   #7 (permalink)
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Default Re: RJ11 using as power line?

Depending on the wire in the RJ11, it's either 22 or 24 gauge as a standard in the US. It's rated to around 3-4A on the top end from what I've looked up...but like iParanormal said, that'll still produce quite a bit of heat.
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Old 09-14-2017, 12:52 PM   #8 (permalink)
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Default Re: RJ11 using as power line?

Need to do some correction on the other end too, RJ11 and RJ45 is a cable end, not a cable. Cat 3 and Cat 5e are going to be about the same size 24 AWG, some Cat5e is 23 but still a tiny cable. As was being said it's going to get hot with that cable, so I'd source something else.
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Old 09-14-2017, 12:56 PM   #9 (permalink)
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Default Re: RJ11 using as power line?

Any suggestions for a nice looking cable which has a Jack set up similar to rj11 or Rj45
I was thinking RJ45 due to Poe
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