Guest Zeppelin Posted August 1, 2006 Report Share Posted August 1, 2006 How do we determine the right gauge for equipment (interconnect) wires?Do we need to derate here too?I have a PSU with 3A continuous & 5A maximum current rating. I was actually planning to use a 10A wire (to be on the safe side) but it proved to be too bulky for the job :( possible overkill ;D Quote Link to comment Share on other sites More sharing options...
audioguru Posted August 1, 2006 Report Share Posted August 1, 2006 Hi Zeppelin,Over-rating the size of wires for equipment interconnect is not overkill when it provides a nice low voltage loss.You don't want to set the regulated supply to 5V and have fluctuating 2V to 5V at the equipment, do you? Good regulated supplies for external equipment use "remote voltage sense" wires in addition to the main wires to the equipment. Then the voltage regulation occurs at the equipment where the wires join. Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted August 24, 2006 Report Share Posted August 24, 2006 audioguru is correct according to me.as of what i feel the voltage drop is of main concern in any case.moreover a safety factor of 3 times is more than sufficient. 15-20 A wire for 5 A max current is not at all a bad choice.what do u say audioguru? Quote Link to comment Share on other sites More sharing options...
indulis Posted August 24, 2006 Report Share Posted August 24, 2006 The "ampacity" of wire is based on temperature rise. Different types of insulation on the same wire AWG will have different ampacities. It really comes down to how much drop can you tolerate. If you need to be "legal" in the regulatory agencies eyes, there are "tables" that specify allowed levels.As a point of reference, the "fusing current" of 30AWG (bare, solid wire) is 10A. Quote Link to comment Share on other sites More sharing options...
Theatronics Posted August 24, 2006 Report Share Posted August 24, 2006 HEY! Thats a great question, Where can one find a table of the FUSING currents of common wire sizes.I have always got a big kick out of running 6ga wire to a circuit, only to see the interconnect wires inside the unit shrink down to 16 or 18ga. I like to keep handy tables around, and I have never seen that one anywhere.-Mike Quote Link to comment Share on other sites More sharing options...
indulis Posted August 24, 2006 Report Share Posted August 24, 2006 http://www.interfacebus.com/Copper_Wire_AWG_SIze.html Quote Link to comment Share on other sites More sharing options...
Theatronics Posted August 24, 2006 Report Share Posted August 24, 2006 Great, Thanks!-Mike Quote Link to comment Share on other sites More sharing options...
ante Posted August 25, 2006 Report Share Posted August 25, 2006 Here is the PDF version:Print it and stick it to the wall!Wire.pdf Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.