is it safe to pass 2.55amperes along a 20AWG teflon hook-up wire? - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 17th April 2007, 03:03 AM   #1
jarthel is offline jarthel  Australia
diyAudio Member
 
Join Date: Jan 2002
Location: somewhere in Australia
Default is it safe to pass 2.55amperes along a 20AWG teflon hook-up wire?

as title. thank you.
  Reply With Quote
Old 17th April 2007, 03:24 AM   #2
Tweeker is offline Tweeker  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Cincinnati, Ohio
Yes.
__________________
Be sure your foil hat has a good low impedance ground.
  Reply With Quote
Old 17th April 2007, 04:16 AM   #3
Irakli is offline Irakli  United States
diyAudio Member
 
Irakli's Avatar
 
Join Date: Aug 2004
Location: washington, DC
Blog Entries: 1
Here, one of the many ref. tables from internet
http://www.powerstream.com/Wire_Size.htm
__________________
My System
  Reply With Quote
Old 17th April 2007, 06:27 AM   #4
jarthel is offline jarthel  Australia
diyAudio Member
 
Join Date: Jan 2002
Location: somewhere in Australia
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.
  Reply With Quote
Old 17th April 2007, 11:15 PM   #5
Tweeker is offline Tweeker  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Cincinnati, Ohio
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.
__________________
Be sure your foil hat has a good low impedance ground.
  Reply With Quote
Old 17th April 2007, 11:20 PM   #6
Apex Jr is offline Apex Jr  United States
diyAudio Member
 
Join Date: Jun 2002
Location: Torrance, Calif
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.
  Reply With Quote
Old 22nd April 2007, 02:04 AM   #7
diyAudio Member
 
Join Date: Feb 2003
Location: GTA
Steve realizing you wire is "surplus" :
what is it mostly, guessing MIL W-22759/? and similar?

Dave
__________________
intentionally blank
  Reply With Quote
Old 22nd April 2007, 06:16 PM   #8
Apex Jr is offline Apex Jr  United States
diyAudio Member
 
Join Date: Jun 2002
Location: Torrance, Calif
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
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
hook up wire Original Burnedfingers Tubes / Valves 5 12th January 2009 06:34 AM
Hook up wire? cjkpkg Tubes / Valves 12 23rd November 2008 11:55 AM
Hook-up Wire? mwh-eng Tubes / Valves 6 4th March 2004 07:30 AM
PVC vs. teflon wire RobPhill33 Solid State 4 27th January 2003 09:10 AM
Hook-up Wire Cambe Parts 0 2nd October 2002 04:58 PM


New To Site? Need Help?

All times are GMT. The time now is 07:18 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2