i google'd this and found 3 Amps ? is that correct ? did i mis-understand ?
That just seems high considering the size of wire , i was planning to connect some IC pins to PCB with this wire where the voltage levels are 32v and 5v and the currents are 40 mA and
Thanks for any useful help, robb
3 amps is correct. You need to derate if bundled or enclosed where where there would be excess heat.
Tom
--- The 3A is specified so that with that charge flowing in the wire the temperature of the wire won't rise above some maximum value at some ambient temperature, say 70C with a 30C ambient.
Since 30AWG wire has a resistance of about 0.1 ohms per foot at 30C,
with 40mA in the wire it'll dissipate:
P = I²R = 0.04A² * 0.1R = 1.6E-4W = 160 microwatts per foot
Likewise, at 10mA you'll be dissipating 10 microwatts per foot, so in either case you'll have absolutely noting to worry about.
-- JF
The table I googled shows #30 at .86A for chassis wiring. That sounds a lot more plausible to me.
Hope This Helps! Rich
30C,
foot
so
Thanks John,Tom,Rich, for your time and help. robb
Here is a link using a chart from Alpha:
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