Morris Products 21899 Service Entrance Insulator

Product Description

The MORRIS PRODUCTS 21899 is a service entrance insulator wire holder designed to secure and support service entrance conductors at the point where overhead utility lines connect to a structure. The unit uses a 0.375-inch x 5-inch bolt for mounting, providing a firm anchor point for incoming service wires. This insulator keeps conductors properly separated and strain-relieved, reducing the risk of contact, chafing, or movement under load. It is a standard component in residential and light commercial electrical service entrance installations and is typically handled by licensed electricians during new construction or service upgrade work.

Service entrance insulators of this type are used on the exterior of residential and light commercial buildings, mounted to the structure near the weatherhead or service mast. The insulator physically supports the drip loop and incoming service conductors before they reach the meter base. Proper positioning of the wire holder keeps conductors clear of the building surface and maintains required separation per local electrical code requirements.

Key Features

• Secures and supports service entrance conductors at the structure attachment point
• Mounts using a 0.375-inch x 5-inch bolt for solid, fixed installation
• Provides insulation between energized conductors and the building structure
• Suitable for residential and light commercial service entrance applications
• Designed for use at the weatherhead or service mast connection point

Compatibility

Designed as a standard OEM-style replacement or new-installation service entrance insulator wire holder for residential and light commercial electrical service entrance mast and weatherhead installations.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local utility requirements. De-energize and coordinate with the utility provider before working near service entrance conductors, as incoming service lines upstream of the meter are utility-controlled and may remain live. Use appropriate mounting hardware for the substrate material and ensure the bolt is secured firmly to prevent conductor movement. Verify conductor clearances from the building surface meet local code requirements after installation.

Technical Specifications

• Bolt Size: 0.375 inches x 5 inches
• UPC: 601986218993

Standard Information

• Brand: MORRIS PRODUCTS
• Manufacturer Part Number: 21899