The right size wire

[jetmech]

I understand the basics when it comes to electrical stuff but I have a more than basic question. I try to match the correct AWG wire with the amount of current I'm pulling through it. That said, is it possible to pull too much current through too small gauge of wire? - I'm assuming yes. I'm using 14 AWG for the boost controller/meth trigger and I want to piggy-back a trigger wire for a relay off that same wire. Don't want to overload the wire though.

[oleshifty]

for all intensive purposes...relay "switches" don't pull any power. Most use less then 1/2 an amp and once they are connected they pull even less.

Just a quick search http://www.interfacebus.com/Copper_Wire_AWG_SIze.html


There is a semi complicated formula for length of wire vs resistance vs size, etc, etc....


Basically, if you're that worried about it, go bigger. But if you're just triggering relays, 14 gauge is fine. I normally use 16 for switch, and either 12 or 10 for everything else depending on how much power it's pulling. Thicker wire isn't THAT much more money when you're only running 6-8 feet at a time.

[Frenchy]

There is such a thing as wire quality too, remember the current doesn't go through the copper strands it goes over it. Higher quality wires will have more smaller strands. increasing surface area which decreases resistance.

[567234ta]

if you are only using it for the trigger on the meth and not the pump it should be just fine to turn a relay on. If you are pulling way too much thru the wire you will see it smoke sometimes or turn brown near the ends, ask me how i know LOL

[raptors_67]

There is such a thing as wire quality too, remember the current doesn't go through the copper strands it goes over it. Higher quality wires will have more smaller strands. increasing surface area which decreases resistance.

This only applies at extremely high frequencies, not applicable to DC circuits at all. Higher strand count can increase the CM of the wire, which can increase ampacity. Generally stranded wire is used to increase flexibility.

[pl4yboy]

This only applies at extremely high frequencies, not applicable to DC circuits at all. Higher strand count can increase the CM of the wire, which can increase ampacity. Generally stranded wire is used to increase flexibility.

Electricity does not change the way it travels based on frequency.