I'm currently doing (or attempting to do!) much the same thing using one 
of these:

http://www.crmagnetics.com/pdf/3110.pdf

3000-turn split-core transformer - gives up to 10V depending on the 
burden resistor - I'm using this to connect it to the PIC:

http://board.homeseer.com/showpost.php?p=627341&postcount=19

(Rest of discussion may or may not be relevant:  
http://board.homeseer.com/showthread.php?t=101794&highlight=cr3110)

HTH,
Andrew

On 3/4/08, Michael Cunningham <michael.cunningham.usa@gmail.com> wrote:
>> I am rather new to PIC development but I am learning fast. I would like to
>> build a circuit to measure the amount of AC current in AMPs flowing through
>> a wire. Any suggestions on how to measure the current without directly
>> connecting to the wire which will be carrying up to 125vac @ 30 amps.
>>
>> Can the PIC ADC be used for this purpose? Eventually I would like to drive an
>> LCD with the value in amps.
>>
>> Any suggestions on where to begin?
>>     
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist