What is a Door Loop?

A door loop is a protective wiring accessory used to safely route electrical wires between a door frame and a swinging door. It is commonly used in access control installations where power needs to be supplied to devices such as electric strikes, mag locks, electric hinges, or electrified locks.

Door loops protect cables from damage caused by repeated door movement and provide a clean, professional appearance in electronic door installations.

Main characteristics of a door loop

Door loops are designed for durability and cable protection.

Key characteristics include:

• Flexible metal or armored housing for wiring protection

• Protects cables from bending and wear

• Surface-mounted to door and frame

• Supports low-voltage power and data cables

• Commonly used with access control hardware

• Easy to install and replace

These features make door loops essential in professional electronic door systems.

How does a door loop work?

A door loop works by acting as a flexible conduit between the door and frame.

The typical process includes:

• Wires are routed through the door loop

• One end is mounted to the door frame

• The other end is mounted to the door

• The loop flexes as the door opens and closes

• The wiring remains protected and intact

• Power and data continue to flow reliably

This ensures long-term protection of wiring in moving door applications.

Types of door loops

Door loops are available in different styles depending on installation needs.

Common types include:

• Standard surface-mounted door loops – most common installation

• Heavy-duty door loops – for high-traffic doors

• Armored door loops – extra protection for security applications

• Slim-profile door loops – for clean architectural appearance

• Pre-wired door loops – include internal cable assemblies

The correct type depends on door usage, environment, and cable requirements.

Where are door loops commonly used?

Door loops are widely used in access control and electronic hardware installations.

Typical applications include:

• Doors with electric strikes

• Mag lock installations

• Electrified mortise and cylindrical locks

• Access control system doors

• Commercial office buildings

• Schools, hospitals, and secured facilities

They are especially important anywhere power must pass into a moving door.

Advantages of door loops

Door loops provide practical and protective benefits for electronic door systems.

Main advantages:

• Protects wiring from damage and failure

• Extends the life of electrical cables

• Improves installation appearance

• Reduces maintenance and repair costs

• Supports reliable access control operation

A door loop is a simple but critical component in electronic door hardware installations. By protecting wiring and ensuring reliable power transfer, it helps maintain long-term performance of access control systems.

Door Loop Overview