[Antennas] RF Poisoning... Chris...

[Kf6sza]

Not sure where the ampacity ratings below came from.  According to NEC, with no more than three current-carrying conductors in a raceway and THHN insulated wire (which is the most common condition for residences), #3/0 AWG copper wire is good for 225 amps; #4/0 AWG aluminum wire with the same insulation is good for 205 amps.  If you plan on installing ferrites on the conductors coming into your service panel, see if you can read the wire size on the insulation.  Power companies are notorious for under-sizing their conductors from NEC requirements; they can get away with a lot of things that electrical contractors cannot.

73,
Rich KF6SZA

Sent from my iPad

> On Feb 22, 2015, at 10:20 AM, KA4INM <ka4inm at gmail.com> wrote:
> 
>  On 02/22/2015 11:59 AM,  W7DBH David wrote:
> 
> /* snip */
>> 3.  I am wondering, do ferrites exist that are big enough to slip-over or
>> or clamp-over insulated #4 200Amp copper or aluminum wires?
> 
>  200 Amperes requires something in the order of 250 MCM for copper or
> 350 MCM for aluminum conductors.  #4 AWG is only good for about
> 95/75 Amperes respectfully.
> -- 
>  Ron  KA4INM - Youvan's corollary:
>                Every action results in unwanted side effects.
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