Meeting every power connection need for over 25 years. Millions of safe, secure NSi mechanical and compression connections are active in the field today. Looking for superior mechanical strength and performance in a copper connection? NSi’s TC Series copper single lugs in extruded styles are formed from one piece of solid copper and we offer tubular copper styles. The DE Series single/double solderless lugs are made of 99.98% pure electrolytic copper with steel plated screws. Any application, any connection–splice, tap and terminate with NSi.