A line of ring-lug terminal block is suitable for use in current transformer and standard wire termination applications for industries such as power generation, utilities, and semiconductor manufacturing. The new ring-lug terminal blocks offer a finger-safe design, which eliminates the need for standard or customized dust cover, and the hinged shroud allows easy and safe wiring. Used together, the WTL 6/4 FF (slide link terminal) and the WTD 6/4 FF (standard feed-through) terminal can be configured to create multiple phase testing configurations for current transformer applications. The integrated test socket screw heads allow the user to insert a current meter in series with the circuit without disruption, preventing the possibility of leaving the current transformer in an open state.