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Technological Terror For the discussion of items of technology such as motors, controllers, motion sensors, audio boards etc. Also to discuss how to hack commercial electronic props.



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Old 10-12-2008
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Default cat5 cable ampacity

How many 12 volt dc amps can cat5 cable handle?
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Old 10-13-2008
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I wouldn't put more than 500mA (half an amp) through it that tiny wire heats up awful fast
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Old 10-13-2008
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Depends on quite a few things. Temperature, # of conductors, and distance distance to name a few. You can find a calculator here. Cat 5 has 8 24 gauge conductors.
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Thanks for the info.

Hedg12 - so I should be able to get ~2 amps per wire in the bundle at 100 ft 80 degrees? Mainly what I am looking at is running triggering air solenoids.
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Old 10-13-2008
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Quote:
Originally Posted by hedg12 View Post
Depends on quite a few things. Temperature, # of conductors, and distance distance to name a few. You can find a calculator here. Cat 5 has 8 24 gauge conductors.
Excellent tip & link - I am using Cat 5 for my triggers as well (24v, though)
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Old 10-14-2008
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Quote:
Originally Posted by dflowers View Post
Thanks for the info.

Hedg12 - so I should be able to get ~2 amps per wire in the bundle at 100 ft 80 degrees? Mainly what I am looking at is running triggering air solenoids.
I'd imagine you'd be fine. Do you know the current draw of your solenoids?
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According to the documentation, they will draw between 3-4.8 watts. Using an Ohms Law Calculator I found online, even with the 4.8 watts at 12v I should be pulling no more than 0.4 amps. Does this sounds correct?
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That's correct - amps * volts = watts, or in this case watts / volts = amps, so you're looking at .4 amps max. You should be fine at 100 feet.
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Old 10-15-2008
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Hmmmm...consider voltage drop at 100'
at 12 volts DC or AC you'll end up with about 17.5% drop or aprox. 9.9 volts on the load end. I should think the solenoids should energize at that voltage.

You may want to test first.
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