Penn-Union BLU-050S

Penn Union BLU-050S is a copper compression lug sized for 500 kcmil conductors. It combines a cable-receiving barrel with a mounting tongue, creating a termination that can be matched to both the conductor and the equipment connection. The specific barrel style, mounting pattern and cable construction details make this part identifiable within the Penn Union connector range. The body uses high-conductivity seamless copper tubing, giving the cable termination a continuous tubular construction. The tin plating provides the corrosion-resistant finish described for this connector. The standard barrel format provides the cable-receiving section of the lug, with the mounting tongue forming the equipment-side interface. A beveled entry helps guide the cable into the barrel during assembly. An inspection window gives a visible point for checking that the cable has reached the intended insertion position before the connection is completed. This feature supports a direct check at the barrel rather than relying only on the exposed cable length. The one-hole mounting arrangement provides a single fastening position on the tongue. The stud opening and tongue profile are the key equipment-side details to match when replacing or specifying this lug. The specified stud or bolt opening is 5/8 inch. The specified conductor matches are Class B & C building wire: 500 kcmil; Class I Weld Cable: 350 MCM 882/24; Diesel Locomotive Cable: 373 MCM; Class H Cable: 400 kcmil; Class G Cable: 400 kcmil; Class M Flexible Cable: 350 kcmil. These sizes are tied to the named cable classes; the building-wire size should not be treated as an interchangeable rating for every flexible cable construction. The brown color code provides an additional identification reference when matching this connector to the specified installation tooling. Dimensional references for this part are W = 1.53 inches, C = 1.44 inches, T = 0.21 inches, B = 1.38 inches, L = 3.63 inches. These drawing labels provide a practical reference for checking the termination footprint and space around the connection. Penn Union identifies this connector for applications up to 35 kV, with the application and completed termination subject to the specified installation requirements. The supplied product information identifies UL 486A-B listing and CSA C22.2 No. 65 certification for power applications; the selected cable and tooling combination must follow the manufacturer requirements. The product information also identifies UL 467 listing for grounding, bonding and direct burial applications, with the corresponding installation requirements applying to the finished connection.