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is it safe to pass 2.55amperes along a 20AWG teflon hook-up wire?
is it safe to pass 2.55amperes along a 20AWG teflon hook-up wire?
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Old 17th April 2007, 03:03 AM   #1
jarthel is offline jarthel  Australia
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Default is it safe to pass 2.55amperes along a 20AWG teflon hook-up wire?

as title. thank you.
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Old 17th April 2007, 03:24 AM   #2
Tweeker is offline Tweeker  United States
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Yes.
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Old 17th April 2007, 04:16 AM   #3
Irakli is offline Irakli  United States
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Here, one of the many ref. tables from internet
http://www.powerstream.com/Wire_Size.htm
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Old 17th April 2007, 06:27 AM   #4
jarthel is offline jarthel  Australia
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Quote:
Originally posted by Irakli
Here, one of the many ref. tables from internet
http://www.powerstream.com/Wire_Size.htm

I have seen that before I created the thread.

I am confused with the rating they gave.

11A for Maximum amps for chassis wiring and 1.5A for Maximum amps for power transmission

The 20AWG wires will be used for powering paralleled tube heaters.
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Old 17th April 2007, 11:15 PM   #5
Tweeker is offline Tweeker  United States
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This means that if the filament transformers are in your treehouse and not on the amp chassis, you need a bigger wire. The power transmission rating is conservative, it is for significant distances/buried etc. Note that it rates 12 gauge (US house wire) at 9.3 amps. US code allows 20 amps on it.

Voltage drop is a bigger concern to you, but the wire itself can take quite a bit of current. Most PTFE wire is good to 200C. Resistance is .033 ohms per meter.

For heaters it will be fine, it might be thin in the case of it feeding a 2.5 amp average current to a capacitor input rectifier. It could readily take it, but circuit considerations might suggest heavier wire.
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Old 17th April 2007, 11:20 PM   #6
Apex Jr is offline Apex Jr  United States
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is it safe to pass 2.55amperes along a 20AWG teflon hook-up wire?
I sell quite a bit of Green PTFE/Teflon wire in 20 Awg
for heaters in tube amps so there should be no problems.

Steve @ Apex Jr.
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Old 22nd April 2007, 02:04 AM   #7
davesaudio is offline davesaudio  Moldova
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Steve realizing you wire is "surplus" :
what is it mostly, guessing MIL W-22759/? and similar?

Dave
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Old 22nd April 2007, 06:16 PM   #8
Apex Jr is offline Apex Jr  United States
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is it safe to pass 2.55amperes along a 20AWG teflon hook-up wire?
Most of the teflon I stock is the M 22759/ 11
or Mil M 16878/4 all 600 volts, however when buying
you also get the thin wall 150 or 300 Volt or the thick
wall 1000V stuff too...
I also have some solid in 22 and 20 Awg too...

Steve
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