Nonstock 1603-2A Standoff Insulator Red Polyester Ul

Product Description

The NONSTOCK 1603-2A is a molded standoff insulator designed for use in panel boards and switchboards where electrical isolation and mechanical support are required. Manufactured from a UL recognized polymeric composite - a reinforced polyester blend incorporating glass strands, fire retardant agent, and cross-linked catalyst - this insulator delivers exceptional dielectric strength of 40 KV and a compression strength of 17,000 pounds. At 1.375 inches tall with a 1.75-inch overall diameter and a 3/8-16 threaded insert, it is a precision-molded component sized for standard bus bar and conductor support applications. Installation is typically performed by licensed electricians and switchgear technicians.

The 1603-2A is rated for use as a panel board and switchboard accessory in compliance with the brace and support requirements of UL 891 Annex G, with UL recognition on file under UL File E354884. It suits residential and commercial distribution equipment where structural bracing of busbars and conductors must meet recognized safety standards. The red color aids visual identification within the enclosure. Its cantilever strength of 800 inch-pounds and torque strength of 30 ft-lbs make it appropriate for high-stress mounting points in switchboard assemblies.

Key Features

• UL recognized polymeric composite construction - UL File E354884, compliant with UL 891 Annex G
• Dielectric strength of 40 KV for reliable electrical isolation
• Compression strength of 17,000 pounds and cantilever strength of 800 inch-pounds
• UL flammability rating of V-0 for fire-retardant performance
• Arc resistance of 180 seconds and track resistance of 600 minutes minimum
• 3/8-16 threaded insert for standard fastener compatibility

Compatibility

Designed as an OEM-style replacement and new-installation standoff insulator for panel board and switchboard assemblies that require UL 891 Annex G compliant brace and support components.

Installation Notes

Installation should be performed by a qualified electrician following applicable NEC requirements and the switchgear manufacturer's assembly guidelines. De-energize and lock out the panel or switchboard fully before installing or replacing standoff insulators. Use appropriate torque tooling when threading into the insert to avoid exceeding the rated torque strength. Verify thread engagement meets the specified insert length of 0.591 inches minimum before applying load.