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NSI Industries ISR-250C - The Polaris ISR-250C Multi-Tap Multi-Tap In-Line Entry Connector features 2 ports sized for 250 MCM - 6 AWG wires. The clear body allows users to see their conductor placement and is wrapped in a layer of plastisol insulation. Each in-line port is pre-loaded with an oxide inhibitor, with removable access plugs over the hex screws used to tighten the connections. Installs with a hex key and torque wrench, without any tape or additional supplies. Designed for use in a wide range of splicing applications, including installation in cable trays, panel boards, ducts, raceways or troughs.
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NSI Industries ISR-250C The Polaris ISR-250C Multi-Tap Multi-Tap In-Line Entry Connector features 2 ports sized…

UPC: 662381996466

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Technical BulletinInstallation InstructionsSpecification Sheet

Contact for Pricing

Minimum Qty: 4

Multiplier: 4

*Contact for lower quantities*

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The NSI Industries Polaris ISR-250C Multi-Tap In-Line Entry Connector is a pre-insulated, 2-port splicing solution engineered for secure, high-current connections between 250 MCM and 6 AWG copper or aluminum conductors. Designed for one-sided wire entry, this connector eliminates the need for additional covers, tape, or supplementary supplies, streamlining installation in cable trays, panel boards, ducts, raceways, and troughs. The ISR-250C features a clear plastisol-insulated body for visual conductor verification, removable hex screw access plugs, and a molded ergonomic design for abrasion and chemical resistance. Rated for 600V and 90°C operating temperature, the connector supports dual-rated copper/aluminum applications with maximum ampacities of 290A (copper) and 230A (aluminum). Installation requires only a hex key and torque wrench, with a specified maximum torque of 360 in-lbs and a 5/16" hex wrench size. Measuring 4.000" in length, 1.190" in width, and 1.900" in height, the ISR-250C is supplied in standard cartons of 4 units. Its single-side wire entry ports simplify routing and reduce clutter in tight installations. The pre-filled oxide inhibitor ensures low-contact resistance and corrosion prevention, while the UV-resistant, non-combustible construction provides long-term reliability in exposed environments. Ideal for parallel runs and high-capacity splicing applications, the ISR-250C is part of NSI’s Polaris pre-insulated connector line, delivering a time-saving, all-in-one solution for industrial and commercial electrical systems.
  • Clear Exterior: Vision Tap transparent design lets users see their work to ensure ideal conductor placement and the most secure connection
  • In-Line Wire Entry: Form secure connections between 2 conductors quickly using the in-line entry ports sized for wires between 250 MCM and 6 AWG
  • Ergonomic Design: Rounded corners and a smooth exterior finish over the abrasion-resistant plastisol insulation make Polaris connectors comfortable to grip
  • Pre-filled Oxide Inhibitor: Both in-line ports are covered by removable plugs and pre-filled with an oxide inhibitor gel to protect against corrosion, debris or moisture
  • Professional Performance: Save time and labor when splicing or reducing in-line wires made from copper or aluminum, in a wide range of applications

Specifications

Aluminum Conductor Max AMP
230 Amp
Aluminum Conductor Note
Dual Rated for use with copper and or aluminum cables. Not for use with fine-stranded, flexible cables
Application
Wire Termination
Color
Clear
Compatibility
Copper and Aluminum
Connection Type
Hex screw, torque wrench
Connection Type
Screw Terminal
Copper Conductor Max
290 Amp
Current Rating
290 A (Cu), 230 A (Al)
Current Rating
290 A (copper), 230 A (aluminum)
Enclosure
Clear Plastisol
Environmental Conditions
Dry Location Only
Finish
Plastisol Insulated
Housing Material
Aluminum
Housing Material
Aluminium
Material
Plastisol, Oxide Inhibitor
Material
Plastisol, Aluminum
Material
Aluminum
Number Of Conductors
2
Number of Poles
1
Operating Temperature
90 °C
Poles
2
Series
Polaris
Size
4.000" x 1.190" x 1.900"
Size
L=4.000 - W=1.190 - H=1.900 IN
Size
250 MCM - 6 AWG
Special Features
250 MCM-6 AWG - Dual Rated
Standard
UL 486A/B
Temperature Rating
90 C
Temperature Rating, Maximum
194 F
Temperature Rating, Maximum
90 C
Temperature Rating, Minimum
194 F
Temperature Rating, Minimum
90 C
Type
IN-Line Splicer/Reducer
Voltage Rating
600 V
Warranty
1 Year
Wire Size
250 MCM-6 AWG
Wire Type
Class B & C
Wire/Cable Class
Class B, Class C
Package Dimensions (L x W x H)
4 IN x 1.19 IN x 1.9 IN
Package Dimensions (L x W x H)
10.16 cm x 3.0226 cm x 4.826 cm
Package Weight (Imperial)
0.340 L
Package Weight (Metric)
0.154 kg
The Polaris IPL250-3C Multi-Tap Single Side Entry Vision Tap Connector features 3 ports sized for 250 MCM - 6 AWG wires. The clear body allows users to see their conductor placement and is wrapped in a layer of plastisol insulation. Each port is pre-loaded with an oxide inhibitor, with removable access plugs over the hex screws used to tighten the connections. Installs with a hex key and torque wrench, without any tape or additional supplies. Designed for use in a wide range of splicing applications, including installation in cable trays, panel boards, ducts, raceways or troughs.

IPL250-3C

The Polaris IPL250-3C Multi-Tap Single Side Entry Vision Tap Connector features 3 ports sized for 250 MCM - 6 AWG wires. The clear body allows users to see their conductor placement and is wrapped in a layer of plastisol insulation. Each port is pre-loaded with an oxide inhibitor, with removable access plugs over the hex screws used to tighten the connections. Installs with a hex key and torque wrench, without any tape or additional supplies. Designed for use in a wide range of splicing applications, including installation in cable trays, panel boards, ducts, raceways or troughs.
Aluminum Pin Terminal, #2 - 1 Stranded, 1/0 Solid. Dies TU, 52, BG, 243, 5/8. Tin-Plated Aluminum Body 3 inches long x .635 inch Diameter. Tin-Plated Copper Pin 17 inches long x .324 inch diameter. Includes Oxide Inhibitor compound, Sealant and Clear Cap.

SAPT 2-1017 CC

Aluminum Pin Terminal, #2 - 1 Stranded, 1/0 Solid. Dies TU, 52, BG, 243, 5/8. Tin-Plated Aluminum Body 3 inches long x .635 inch Diameter. Tin-Plated Copper Pin 17 inches long x .324 inch diameter. Includes Oxide Inhibitor compound, Sealant and Clear Cap.
Panduit JN218-216-C Nylon Insulated Wire Joint

JN218-216-C

Panduit JN218-216-C Nylon Insulated Wire Joint
Rectangular Power Connectors, Housing, Receptacle / Plug, Wire-to-Wire, 1 Position, Wire & Cable, UL 94V-2, Power, Panel Mount

53884-1

Rectangular Power Connectors, Housing, Receptacle / Plug, Wire-to-Wire, 1 Position, Wire & Cable, UL 94V-2, Power, Panel Mount
The Polaris IPL350-3C Multi-Tap Single Side Entry Vision Tap Connector features 3 ports sized for 350 MCM - 6 AWG wires. The clear body allows users to see their conductor placement and is wrapped in a layer of plastisol insulation. Each port is pre-loaded with an oxide inhibitor, with removable access plugs over the hex screws used to tighten the connections. Installs with a hex key and torque wrench, without any tape or additional supplies. Designed for use in a wide range of splicing applications, including installation in cable trays, panel boards, ducts, raceways or troughs.

IPL350-3C

The Polaris IPL350-3C Multi-Tap Single Side Entry Vision Tap Connector features 3 ports sized for 350 MCM - 6 AWG wires. The clear body allows users to see their conductor placement and is wrapped in a layer of plastisol insulation. Each port is pre-loaded with an oxide inhibitor, with removable access plugs over the hex screws used to tighten the connections. Installs with a hex key and torque wrench, without any tape or additional supplies. Designed for use in a wide range of splicing applications, including installation in cable trays, panel boards, ducts, raceways or troughs.
The Polaris IPLD350-5C Multi-Tap Dual-Sided Entry Vision Tap Connector features 5 ports sized for 350 MCM - 6 AWG wires. The clear body allows users to see their conductor placement and is wrapped in a layer of plastisol insulation. Each dual-sided port is pre-loaded with an oxide inhibitor, with removable access plugs over the hex screws used to tighten the connections. Installs with a hex key and torque wrench, without any tape or additional supplies. Designed for use in a wide range of splicing applications, including installation in cable trays, panel boards, ducts, raceways or troughs.

IPLD350-5C

The Polaris IPLD350-5C Multi-Tap Dual-Sided Entry Vision Tap Connector features 5 ports sized for 350 MCM - 6 AWG wires. The clear body allows users to see their conductor placement and is wrapped in a layer of plastisol insulation. Each dual-sided port is pre-loaded with an oxide inhibitor, with removable access plugs over the hex screws used to tighten the connections. Installs with a hex key and torque wrench, without any tape or additional supplies. Designed for use in a wide range of splicing applications, including installation in cable trays, panel boards, ducts, raceways or troughs.
The Polaris ISR-350C Multi-Tap Multi-Tap In-Line Entry Connector features 2 ports sized for 350 MCM - 6 AWG wires. The clear body allows users to see their conductor placement and is wrapped in a layer of plastisol insulation. Each in-line port is pre-loaded with an oxide inhibitor, with removable access plugs over the hex screws used to tighten the connections. Installs with a hex key and torque wrench, without any tape or additional supplies. Designed for use in a wide range of splicing applications, including installation in cable trays, panel boards, ducts, raceways or troughs.

ISR-350C

The Polaris ISR-350C Multi-Tap Multi-Tap In-Line Entry Connector features 2 ports sized for 350 MCM - 6 AWG wires. The clear body allows users to see their conductor placement and is wrapped in a layer of plastisol insulation. Each in-line port is pre-loaded with an oxide inhibitor, with removable access plugs over the hex screws used to tighten the connections. Installs with a hex key and torque wrench, without any tape or additional supplies. Designed for use in a wide range of splicing applications, including installation in cable trays, panel boards, ducts, raceways or troughs.
The Polaris IPLD350-8C Multi-Tap Dual-Sided Entry Vision Tap Connector features 8 ports sized for 350 MCM - 6 AWG wires. The clear body allows users to see their conductor placement and is wrapped in a layer of plastisol insulation. Each dual-sided port is pre-loaded with an oxide inhibitor, with removable access plugs over the hex screws used to tighten the connections. Installs with a hex key and torque wrench, without any tape or additional supplies. Designed for use in a wide range of splicing applications, including installation in cable trays, panel boards, ducts, raceways or troughs.

IPLD350-8C

The Polaris IPLD350-8C Multi-Tap Dual-Sided Entry Vision Tap Connector features 8 ports sized for 350 MCM - 6 AWG wires. The clear body allows users to see their conductor placement and is wrapped in a layer of plastisol insulation. Each dual-sided port is pre-loaded with an oxide inhibitor, with removable access plugs over the hex screws used to tighten the connections. Installs with a hex key and torque wrench, without any tape or additional supplies. Designed for use in a wide range of splicing applications, including installation in cable trays, panel boards, ducts, raceways or troughs.

Frequently Asked Questions

What units are the dimensions shown in?

The drawing states that dimensions are in inches.

What product family does ISR-250C belong to?

It is part of the ISR and ISRH pre-insulated connectors product family.

How can I contact NSI for product ordering?

For product orders in the United States, call (704) 439-2420.

Where can I find product information online?

Product information is available at www.nsiindustries.com.

How to Install the ISR-250C BLACK & VISION TAP®

Instructions for installing the ISR-250C BLACK & VISION TAP® connector, including wire preparation and securement.

Estimated time: 15m

Tools needed:

Wire brush, Hex wrench set

Supplies needed:

Conductors, Oxide inhibitor gel (pre-filled in connector)

  1. Prepare the Wire

    Strip the wire insulation according to Chart 1. If oxidation is present on the conductor, clean it with a wire brush.

  2. Insert Conductors

    Insert each conductor into a different port of the connector. Ensure the wire insulation extends at least 3/8" into the connector port.

  3. Secure Pressure Screws

    Secure the pressure screws using the appropriate hex wrench size and torque value specified in Chart 2. Refer to the product's nameplate or datasheet for specific torque values if they vary.

Frequently Asked Questions about NSI Industries

How are Tork products typically installed?

Tork products are typically installed by trained technicians who follow a comprehensive commissioning process. This includes verifying the work environment, conducting electrical installation checks, performing internal and external equipment inspections, powering on the system, and executing operational tests to ensure compatibility and reliability.

What environmental ratings do Tork products have?

Tork products are designed to meet various environmental ratings, including NEMA Type 4X and Type 6, which provide protection against corrosion, windblown dust, rain, and occasional temporary submersion. These ratings ensure that Tork products can withstand harsh industrial environments while maintaining operational integrity.

What communication protocols do Tork products support?

Tork products support a comprehensive range of communication protocols, including PROFIBUS DP V1, PROFINET with dual port, EtherNet/IP with dual port, CANopen, and Modbus RTU integrated as standard. These protocols facilitate flexible network integration and high-performance communication across various industrial automation systems.

What are the key features of Tork products?

Tork products are designed with advanced features that enhance efficiency and reliability in industrial applications. Key features include integrated harmonics and EMC design for improved power quality, removable terminals for quick installation, and USB ports for easy troubleshooting. Additionally, Tork solutions emphasize user-friendly setup with application wizards and memory modules for convenient parameter management.

What are the main product lines offered by Tork?

Tork offers a diverse range of products primarily focused on industrial automation, including TORK® Photocontrols, lighting controls, and various electrical components such as enclosures, occupancy sensors, and grounding solutions. These products are designed to enhance efficiency and reliability in commercial and industrial applications.

What technical support does Tork offer?

Tork offers a comprehensive range of technical support services, including 24/7 customer support, on-site service management, and a technical hotline network. With three advanced technical support centers and over 8,000 hours of technical training conducted annually, Tork ensures certified expertise across 25+ languages to assist customers effectively. Their commitment to service is reflected in a 98% Service Level Agreement compliance rate, providing reliable support for all operational needs.

What industries and applications are Tork products used for?

Tork products are utilized across a variety of industries, including food processing, healthcare, hospitality, and manufacturing. They are designed for applications such as hand hygiene, surface cleaning, and dispensing solutions, ensuring efficiency and compliance in environments that require high standards of cleanliness and safety.

What certifications and standards do Tork products comply with?

Tork products comply with UL and cUL certifications, ensuring they meet rigorous safety and performance standards. Additionally, many models are designed to meet NEMA enclosure ratings, providing protection against environmental factors.

How are Remke products typically installed?

Remke products are typically installed through a systematic process that includes site audits to verify proper wiring, followed by remote or on-site commissioning. This commissioning involves installation verification, programming, and communication testing to ensure the system operates reliably and meets design specifications.

What accessories are available for Remke products?

Remke offers a wide range of accessories for their products, including panel mounting kits, fuse holders for voltage inputs, ferrites for communication modules, and current transformers. These accessories enhance the functionality and protection of Remke's industrial automation solutions, ensuring reliable performance in various applications.