NSI Industries ISRH-750 - The Polaris ISRH-750 Heavy-Duty Multi-Tap In-Line Entry Connector features 2 ports sized for 750 MCM – 1/0 AWG wires. The body is made from aluminum alloy wrapped in a layer of plastisol insulation. Each port is pre-loaded with an oxide inhibitor, with removable access plugs over the double hex screws used to tighten the connections. Installs with a hex key and torque wrench, without any tape or additional supplies, and comes packaged in a clear plastic bag with a mounting hole for hanging in retail displays. Designed for use in a wide range of splicing applications, including installation in cable trays, panel boards, ducts, raceways or troughs.
NSI Industries

ISRH-750

UPC: 662381926456

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Minimum Qty: 2

Multiplier: 2

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Overview

The Polaris ISRH-750 2-Port In-Line Connector provides the simplest solution for forming a secure, heavy-duty connection between two conductors in splicing and reducing applications including cable trays, panel boards, ducts, raceways or troughs. Sized for 750 MCM – 1/0 AWG wires and rated for 600V, this pre-insulated connector comes pre-loaded with an oxide inhibitor and installs faster than traditional uninsulated connector options using just a hex key and torque wrench. The aluminum alloy body is wrapped in high-dielectric strength plastisol insulation, which is ergonomically molded to offer a comfortable grip, in addition to being resistant to abrasion, chemicals and UV rays. All-in-one design saves time and supplies on each job by eliminating the need for cover and taping; simply brush the conductors clean, strip back their insulation, insert one conductor into each port and secure the covered pressure screws. The ISRH-750 connector is rated for a 90 degrees Celsius operating temperature and dual rated for use with copper and/or aluminum cables, up to max AMP ratings of 535 and 435 respectively. Polaris: the original pre-insulated connector and still the brand most asked for by name.
  • In-Line Wire Entry: Form heavy-duty connections between 2 conductors quickly using the in-line entry ports sized for wires between 750 MCM and 1/0 AWG
  • Ergonomic Design: Rounded corners and a smooth exterior finish over the abrasion-resistant plastisol insulation make Polaris connectors comfortable to grip
  • Removable Plugs: Each port and both pairs of set screw comes with a secure plug to prevent debris from entering the insulated connector
  • Pre-filled Oxide Inhibitor: Both in-line ports come pre-filled with an oxide inhibitor gel to prevent corrosion and provide low-contact resistance
  • 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
435 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
Black
Copper Conductor Max
535 Amp
Environmental Conditions
90 C
Finish
Plastisol Insulated
Housing Material
Aluminum
Housing Material
Aluminium
Material
Aluminum
Number Of Conductors
2
Number Of Poles
1
Size
L=7.250 - W=1.750 - H=3.250 IN
Special Features
750-250 MCM - 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
750-250 MCM
Wire Type
Class B & C
Wire/Cable Class
Class B, Class C
Package Dimensions (L x W x H)
7.25 IN x 1.75 IN x 3.25 IN
Package Dimensions (L x W x H)
18.415 cm x 4.445 cm x 8.255 cm
Package Weight (Imperial)
1.850 L
Package Weight (Metric)
0.839 kg
The Polaris ISR-500 Multi-Tap In-Line Entry Connector features 2 ports sized for 500 MCM - 4 AWG wires. The body is made from aluminum alloy 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.

ISR-500

The Polaris ISR-500 Multi-Tap In-Line Entry Connector features 2 ports sized for 500 MCM - 4 AWG wires. The body is made from aluminum alloy 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 ISR-350B Multi-Tap In-Line Entry Connector features 2 ports sized for 350 MCM - 6 AWG wires. The body is made from aluminum alloy 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.

ISR-350B

The Polaris ISR-350B Multi-Tap In-Line Entry Connector features 2 ports sized for 350 MCM - 6 AWG wires. The body is made from aluminum alloy 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.
POLARIS 750 Multi-Tap Black Insulated Connector with 4 Conductors and One Side Wire Entry. Rated for 750-250 MCM, 90 degree C and 600V.

IPL750-4

POLARIS 750 Multi-Tap Black Insulated Connector with 4 Conductors and One Side Wire Entry. Rated for 750-250 MCM, 90 degree C and 600V.
The Polaris IPLD250-3 Multi-Tap Dual-Sided Entry Black Connector features 3 ports sized for 250 MCM - 6 AWG wires. The body is made from aluminum alloy 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.

IPLD250-3

The Polaris IPLD250-3 Multi-Tap Dual-Sided Entry Black Connector features 3 ports sized for 250 MCM - 6 AWG wires. The body is made from aluminum alloy 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 IPL4-4 Multi-Tap Single Side Entry Connector features 4 ports sized for 4-14 AWG wires. The body is made from aluminum alloy 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.

IPL4-4

The Polaris IPL4-4 Multi-Tap Single Side Entry Connector features 4 ports sized for 4-14 AWG wires. The body is made from aluminum alloy 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.

Frequently Asked Questions about NSI Industries

What technical support does NSi Industries offer?

NSi Industries offers dedicated technical support through their toll-free technical support line at 888.500.4598. They are committed to customer satisfaction and promise to make every reasonable effort to remedy any product or service issues. Additionally, customers can contact their customer service team at 800.321.5847 or email [email protected] for further technical assistance.

What are the key features of NSi Industries products?

NSi Industries products feature exceptional versatility, reliability, and safety across multiple industrial automation categories. Key features include insulation piercing connectors with no wire stripping required, watertight and corrosion-free designs, wide wire range compatibility (from #14 AWG to 750 MCM), and the ability to install on energized conductors. Their product lines like Easy-Tap™ Connectors and TORK® Digital Timers demonstrate advanced capabilities such as turbo spacers, double shear-head bolts, astronomic scheduling, and enhanced switching technologies.

What environmental ratings do NSi Industries products have?

NSi Industries enclosures feature robust environmental ratings, including IEC 60529 IP66 certification, NEMA Type 1, 2, 3, 4, 4X, 12, and 13 ratings, and UL/CSA standards. Their products are designed for both indoor and outdoor applications, with protection against dust, water, corrosion, and extreme temperatures ranging from -40°F to 266°F.

How are NSi Industries products typically installed?

NSi Industries products are typically installed using detailed mechanical and digital wiring diagrams that specify precise connection methods for various voltage configurations (120V, 208V, 240V, 277V, 480V). Installation involves carefully following product-specific wiring schematics, which include clear terminal block connections, ground wire specifications, and phase alignment requirements. Professional electricians and technicians should reference the specific product's wiring diagram to ensure correct installation and electrical compliance.

What industries and applications are NSi Industries products used for?

NSi Industries provides electrical and automation products for diverse industrial applications, including lighting control, electrical enclosures, wire management, connectors, and sensor technologies. Their product lines serve commercial, industrial, and infrastructure markets with solutions for electrical infrastructure, control systems, and safety-critical environments.

What are the main product lines offered by NSi Industries?

NSi Industries offers a comprehensive range of industrial products including TORK® Photocontrols, Polaris™ Lighting Controls, Easy-Twist™ Grounding Solutions, Miniterms, Cable Ties, Connectors, Enclosures, Occupancy Sensors, and Wire Management systems. Their product lines span electrical components, control devices, and industrial automation accessories designed for diverse applications in commercial and industrial settings.

What accessories are available for NSi Industries products?

NSi Industries offers a range of accessories for their product lines, including photocontrol accessories like replacement caps, mounting brackets, and receptacles. Specific accessories include shorting caps, open caps, 3-pin and 7-pin receptacles, and utility mounting brackets for conduit photocontrols. For specialized applications, NSi recommends contacting their customer service team to discuss custom accessory needs.