Current carrying capacity of shielded wire by the wire gauge

[A K]

Having a hard time finding something that isn't rocket science.

I want to know the current carrying capacity of shielded wire by the wire gauge for runs of less than 25 feet.

I found this.

Any recommendations?

[gfretwell]

Generally you will run into voltage drop problems before you have overheating problems with low voltage. A 3 or 4 volt drop at 120v is no big deal but that same current will still drop 3 or 4 at 12v and that is a killer.

[A K]

That is interesting info, but it does not answer my ?

Andy

[trader_4]

What kind of "shielded" wire are you talking about? If it's a multiconductor shielded cable, like you'd use for sensitive signaling or audio, then it's just like any other cable, determined by the gauge of the conductors inside the shield. If it's coax you're talking about, it's typically not used for DC or low freq AC. What are you using and trying to do?

[Dean Hoffman]

This help?

[gfretwell]

If you are talking about low voltage (<30v) you are better served by a voltage drop calculator than a ampacity table. Does that help? Without knowing the length of the run, there is no right answer.

[Tom]

Yes

[Davej]

Why don't you just test it and find out?

[Nerd]

rocket science is so difficult

voltage = current * resistance

[Ralph Mowery]

You need to be more specific about what you want to do.

How much voltage and current is going to be used with the wire? What kind of shielded wire ? How long is the wire ?

You were pointed to a wire chart. Usually you can take the guage of the center conductor and use it for a starting point.