NSi Industries Polaris™ Insulated In-Line Splice Connector, 500 MCM-4 AWG

NSi Industries Polaris™ Insulated In-Line Splice Connector, 500 MCM-4 AWG

The NSi Industries Polaris™ Insulated In-Line Splice Connector (ISR Series) is engineered for secure, code-compliant wire termination in a 500 MCM – 4 AWG conductor range. Built to accommodate 2 conductors of Class B & C stranding, this in-line splicer/reducer carries a 600 V voltage rating and a 90° C temperature rating, making it suitable for demanding commercial and industrial electrical work. The black Plastisol insulation provides a durable, pre-insulated sleeve that speeds installation while protecting the splice, and the connector is cULus listed for verified performance and code compliance.

Key Features

• Wire Range: 500 MCM – 4 AWG accommodates a broad range of conductor sizes in a single splice connector.
• Number Of Conductors: Designed for 2 conductors, supporting Class B & C stranded wire types.
• Voltage Rating: 600 V rating supports reliable in-line splicing and reduction applications.
• Temperature Rating: 90° C rating for continuous performance in demanding environmental conditions.
• Durable Construction: Black Plastisol material and finish deliver a tough, pre-insulated sleeve that resists damage during and after installation.
• Type: In-Line Splicer/Reducer configuration allows direct in-line termination and conductor reduction without additional taping.
• Application: Purpose-built for wire termination tasks across electrical distribution systems.

Certifications & Compliance

• cULus Listed

Technical Specifications

• Number Of Conductors: 2
• Brand Name: NSi
• Spec Sheet: https://media.distributordatasolutions.com/nsi/2020q1/061277d5871f4ee0fe7173e9e2d4d1e599b93b8d.pdf
• Department: Electrical
• Product Group: Wiring Devices

Typical Applications

• Commercial and Industrial Electrical Wiring
• Wire Splicing and Conductor Reduction
• Panelboard and Distribution Wiring
• Insulated In-Line Wire Termination
• Renovation and New Construction Electrical Work

Why NSi Industries?

NSi Industries builds the Polaris™ ISR Series with a black Plastisol insulated sleeve, a 600 V and 90° C rating, and cULus listing behind every insulated in-line splice connector. For electricians and contractors who need a dependable 500 MCM – 4 AWG splice solution for 2-conductor terminations, the Polaris™ ISR Series delivers consistent, code-compliant performance for professional electrical installations.