FAQs

Frequently asked questions about nVent ILSCO.

• Do ILSCO connectors meet UL and NEC requirements?

  Yes. ILSCO connectors are UL 486A/B Listed for 90°C operation and CSA Certified for 600V. Certain panelboard lugs are rated up to 35kV when installed with proper spacing and insulation. ILSCO was also the first to meet NEC 230.46, which requires connectors marked for line-side service use, giving contractors confidence their installations are code-compliant.

• What’s the difference between SureCrimp compression connectors and mechanical connectors?

  SureCrimp connectors create permanent, gas-tight bonds that last as long as the conductor. They feature color-coded dies, optimized crimp profiles, and chamfered wire entry for consistent results and easier installation. Mechanical connectors allow more flexibility in temporary or frequently modified systems, but they don’t match the reliability or current-carrying performance of compression connectors.

• How do ILSCO pre-insulated connectors save installation time?

  Nimbus and ClearTap connectors eliminate the need for taping and come with transparent housings for visual inspection. Each port is pre-filled with De-Ox oxide inhibitor, ensuring corrosion protection without additional steps. This design speeds installation, simplifies inspections, and reduces rework compared to traditional taped connections.

• What’s the difference between Nimbus and ClearTap pre-insulated connectors?

  Nimbus offers the broadest range of in-line, multi-tap, and side-entry configurations for service and distribution projects. ClearTap provides transparent covers so inspectors can confirm conductor placement at a glance. Both are UL Listed, CSA Certified, and dual-rated for copper and aluminum, making them safe, versatile, and inspection-friendly.

• Are ILSCO connectors suitable for both copper and aluminum conductors?

  Yes. ILSCO dual-rated connectors are made from high-strength aluminum alloy with electro-tin plating to prevent corrosion. With the proper De-Ox oxide inhibitor, they deliver safe, long-term performance in mixed-metal systems, even in outdoor or high-moisture environments.

• What tools are needed for installing ILSCO compression connectors?

  ILSCO TaskMaster Tools are engineered for consistent, code-compliant crimps and are UL-classified with connectors from all major competitors. They feature 360° rotating heads, dual-speed pumps, LED lights, and ergonomic grips to improve productivity and reduce fatigue. With compatibility across 95% of the market, contractors can reduce die inventory and standardize their toolkits.

• How do ILSCO connectors ensure electrical safety?

  ILSCO connectors are tested for fault current performance and meet UL 486A/B standards. Optimized crimp profiles maximize conductor contact, and embossed markings provide visible proof of proper installation. These features reduce the risk of loose connections, overheating, or inspection failures.

• What is the expected service life of ILSCO compression connections?

  When installed with the proper tools and oxide inhibitor, ILSCO compression connections typically last 25–30 years or more, which is equal to the conductor itself. Because they form permanent, low-resistance bonds, they maintain performance without ongoing maintenance or periodic retorquing.

• What applications are ILSCO parallel tap connectors used for?

  ILSCO GTA series parallel taps are used in service entrances, meter sockets, and distribution panels. Their lay-in design allows installers to connect taps without cutting the main conductor, reducing service interruptions and installation time. These connectors are reusable and range-taking, making them versatile for utility and commercial projects.

• How does De-Ox oxide inhibitor improve reliability?

  De-Ox fills conductor strands with an air-tight seal that prevents oxidation and corrosion over time. Available in NON-GRIT, ZINC, and COPPER formulations, it supports both copper and aluminum installations. By maintaining low-resistance connections, De-Ox extends service life and helps ensure long-term system reliability.

• What warranty coverage does ILSCO provide?

  All ILSCO products are covered under nVent’s standard warranty against defects in materials and workmanship. In addition, TaskMaster hydraulic tools are backed by the TaskMasterPRO five-year service protection program, which extends tool life, reduces maintenance costs, and minimizes downtime. For full warranty terms across all nVent brands (including ILSCO), visit the nVent warranty terms page.

• Why do contractors choose ILSCO products?

  Contractors value ILSCO for reliability, labor savings, and inspection-friendly features. Pre-insulated connectors eliminate taping, SureCrimp connectors reduce callbacks, and TaskMaster Tools cut installation time. With over 130 years of proven use in utility, telecom, industrial, and commercial markets, ILSCO products are trusted to perform on demanding projects.