Looking at those pictures, I'm not so sure that is a current transformer, I= =20 would guess it is either a voltage transformer or a choke. Unless it is a=20 voltage transformer wired in series across the circuit. Colin -- cdb, colin@btech-online.co.uk on 2/03/2014 =20 Web presence: www.btech-online.co.uk =20 =20 Hosted by: www.justhost.com.au =20 =20 This email is to be considered private if addressed to a named individual= =20 or Personnel Department, and public if addressed to a blog, forum or news= =20 article. =20 =20 =20 --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .