Whether you're installing electrical systems or setting up a communication network, you may come across the term feeder cable. But what exactly is it, and how is it different from other types of cables?
what is feeder cable
In this article, we explain what feeder cable means, where it’s used, and why it plays a critical role in both power and signal transmission systems.
What Is a Feeder Cable?
A feeder cable is a main cable that carries power or signal from a central source (like a panel, transmitter, or power distribution point) to a secondary point, such as a subpanel, building, antenna, or large device.
The term is commonly used in two contexts:
Electrical power systems
Telecommunications and RF (radio frequency) systems
1. Feeder Cable in Electrical Systems
In electrical installations, a feeder cable refers to a thick, high-capacity cable that runs between the main electrical panel (or transformer) and subpanels, distribution boards, or large equipment.
✅ Characteristics:
Larger wire sizes (e.g., 2 AWG to 500 MCM or more)
Carries high currents
Usually copper or aluminum conductors
May be installed underground, in conduit, or overhead
✅ Common Uses:
Supplying power from the main breaker panel to subpanels in large buildings
Delivering electricity to industrial machines or HVAC systems
Powering remote buildings or detached garages
Connecting transformers to buildings in utility grids
2. Feeder Cable in Telecommunications / RF
In wireless systems, a feeder cable refers to the coaxial cable that carries RF signals from the base station or transmitter to an antenna, often in cell towers or radio stations.
✅ Characteristics:
Usually low-loss coaxial cable (e.g., ½', 7/8', or 1-5/8' diameter)
Designed for long-distance, high-frequency signal delivery
UV-resistant, weatherproof jackets for outdoor use
✅ Common Uses:
Cell tower antennas
Broadcast and FM radio transmission
Microwave and satellite communication
Wi-Fi or DAS (Distributed Antenna Systems)
Feeder Cable vs Branch Circuit Cable
| Feeder Cable | Branch Circuit Cable |
|---|---|
| Main cable from source to panel | Cable from panel to final outlet or device |
| Handles higher current loads | Handles lower, localized loads |
| Larger conductor sizes | Smaller wire gauges (e.g., 12/14 AWG) |
| Not usually fused at the destination | Protected by circuit breakers |
How to Choose the Right Feeder Cable
When selecting a feeder cable, consider:
Current load (amperage)
Voltage level
Distance (voltage drop)
Environment (indoor/outdoor, buried/exposed)
Applicable codes (e.g., NEC for U.S.)
Conclusion
A feeder cable is a critical component in both electrical power distribution and signal transmission systems. Whether it’s powering a subpanel or connecting a cellular antenna, it’s designed to carry large amounts of power or high-frequency signals over distance—reliably and safely.
Need Feeder Cables?
We supply a full range of electrical feeder cables (e.g., THHN, XHHW, USE-2, MV cables) and RF coaxial feeder cables for telecom applications. Contact us today for expert advice and competitive pricing.
