What is the problem with this design regarding UL? Is it the problem with 
the transformer? Does it need to be UL recognized or better UL listed?

-----Original Message-----
From: Charles Craft 
Sent: Wednesday, July 06, 2005 11:33 AM
To: Microcontroller discussion list - Public.
Subject: Re: [EE] AC current sensing

Depends on if you want UL cert down the road.
Not being directly in the current path makes life a little easier.

-----Original Message-----
From: Martin K 
Sent: Jul 5, 2005 11:06 PM


I just had an idea on a way to measure AC current. The idea is to take a
small resistor .01 ohms and put it in series with the AC load. To
isolate this from the AC line one could use a surplus 600 ohm tel.
transformer. The benefit of this would be that the parts are very
inexpensive versus a dedicated current transformer. A clamp-on style is
not desirable in this application. Any thoughts?
-- 
Martin K
http://wwia.org/



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