Industrial NSB L400 Electrical Lug Terminal Assembly

Blackburn NSB L400 lug terminal assembly is a copper lug in Blackburn’s L400 family designed for high-current conductor terminations in electrical distribution equipment. This Type L compact mechanical connector accepts copper conductors from 4/0 AWG up to 500 kcmil, uses a 9/16 in stud, and features a single bolt hole to secure connections in tight terminations. Copper construction provides low-resistance, durable conductivity and is paired with a robust mounting footprint typical of Blackburn’s L400 line, manufactured under the ABB Thomas & Betts Blackburn branding. A well-documented variant within this family is the L400-BB, described in distributor catalogs as supporting 4/0 AWG to 500 kcmil copper conductors, with a 9/16 in stud and a single bolt hole, confirming its role as a compact, single-bolt termination option for copper conductors in heavy-duty applications.