I don't use any ......should I ????? and why should I ??? (is it safer for my life ???) I do remember when using my scope , that i did once or two blown something in a TV .(when connecting the ground wire of my probe)..... but I think that I may be reversed phases on my hookup electricity ..... I wanna know how to hookup one for my set-up : I got a metal technician's bench few yrs ago (old one I bought cheap from my ex-job ) and redone the wiring with switches for/and the AC outlets in front of me . should I ground the bench ? (is has a solid metal base and frame) and ....where should I connect my scope to ? and ..... if I miswired my AC ..... how should it be done ? I think I will work on my other bench (it is a wooden one ) till I receive inputs from you ... mouhahhahahah Gaetan Bourgouin Techno Logik Terrebonne Que. Ca. techno1@xxxxxxxxxxxx ------------------------------------------ Make your TechAssist database better! Submit Repair Tips here: http://www.tech-assist.org/secure/tip/ ------------------------------------------ To UNSUBSCRIBE your email address, click here: mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe Or send a BLANK email with unsubscribe in the SUBJECT field to the address above.