[Elecraft] Elecraft Digest, Vol 114, Issue 11

[Don Wilhelm]

Geesh, how is that possible - twice the current equals twice as much 
heat and will exceed the capacity of the wire.  The current rating for a 
wire is the *same* no matter what the voltage.
Also note that the safe rated current is different for wires in a bundle 
and for a single wire - the heat is not dissipated as easily in a bundle.

Now if we are talking about Power delivered to the load, that is an 
'horse of a different color'
twice the power can be delivered over a wire (of any gauge) at 240 volts 
as opposed to 120 volts.

A bit of study on basic Ohm's Law (both for EI&R and for EI&P should 
make all that clear.

73,
Don W3FPR

On 10/7/2013 2:51 PM, Richard Fjeld wrote:
> I better say 'twice the current carrying capacity'.
>
>
> -----Original Message----- From: Richard Fjeld
> Sent: Monday, October 07, 2013 1:44 PM
> To: Brad Blasing ; elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Elecraft Digest, Vol 114, Issue 11
>
> I didn't check your figures, but I agree with your understanding 
> except at
> 240 volts, that same wire gauge would have twice the capacity.