Ideal and GB both make a tester that will check the polarity of any receptacle as well as a button to check for GFCI protection. Relatively cheap unit and great for double checking receptacles after they have been installed. Home Depot has em' for 8.00. Check electrical testers.

[This message has been edited by elektrikguy (edited 08-09-2002).]

[This message has been edited by elektrikguy (edited 08-09-2002).]