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An underground telephone cable provides a durable phone line connection for outdoor phones or electrical installations. Also called an underground phone cord or phone wire, an underground telephone cable is buried beneath the ground to route phone connectivity to external structures beyond a building safely. Subsurface placement of a telephone cable protects the wires from hazards and harsh weather that above-ground lines would face.

Design of an underground telephone cable

An underground telephone cable contains waterproof insulation and sheathing that allows direct subsurface burial without needing conduit. The thick polyethylene and high-density covering on an underground telephone cable resist moisture infiltration that could corrode the copper conductors. Abrasion-resistant shells on the telephone cable are also designed to withstand rocks and debris usually present underground. The durability and multiple line capacity of an underground telephone cable provide the ideal connectivity solutions for running phone access beyond a building securely over farther distances.

Features of an underground telephone cable

Underground telephone cable models come pre-assembled in long, continuous lengths of up to 1000 feet, allowing them to run long distances without needing splices. In contrast to regular indoor phone line cord lengths that are typically only under 10 feet, outdoor telephone cable sizes help minimize connections that could fail from corrosion. Pre-made extended underground telephone cable options simplify installations.

An outdoor phone cable utilizes heavier AWG wires compared to much lighter AWG wires of interior a standard telephone cord option. The thicker gauge conductors of a telephone cable better resist bending and abrasion stresses when pulled through rigid, rocky earth during burial. This ensures consistent signal transmission. Underground telephone cable lines also contain variable conductor counts to support multiple phone connections or circuits. While basic 2-line telephone cable models suffice for individual installations, up to 25-line underground phone line bundles can serve homes, offices, and other spaces that require more phones and connectivity. Multiple telephone cable lines allow for future expansion and flexibility of a phone network in whatever area.

Safety certifications of an underground telephone cable

Proper outdoor installation, according to National Electrical Code standards, keeps underground telephone cable lines safe and functional for decades. Strict telephone cable safety considerations include minimum burial depth, soil condition, and clearance of the telephone cables from other electrical utilities. That is why only qualified telephone cable and cord electricians are usually allowed to handle complex installations. People interested in installing underground telephone cables are encouraged to consult an expert before doing anything themselves.

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