[tlug] Measuring Power (was Re: Bitsa Woes)

[jep200404@example.com]

On Thu, 15 Sep 2011 10:12:47 +0900, "Stephen J. Turnbull" <stephen@example.com> wrote:

> More seriously, maybe there
> is some sort of inductive way to measure the current going through the
> power cord?

Using CTs (current transformers) is the usual inductive way, 
and is often a pain in the butt. At low loads, CTs are 
non-linear. 

   https://secure.wikimedia.org/wikipedia/en/wiki/Current_transformer
   http://www.theenergydetective.com/

Here's the resistive way: 

   https://secure.wikimedia.org/wikipedia/en/wiki/Kill_A_Watt

I am very satisfied with my P4400.