18AWG Shielded Alarm Security Cable – 2 Conductor, Stranded, 1000ft Pull Box, White

18AWG Shielded Security Cable 1000ft 2 Conductor – Commercial-Scale EMI-Protected Alarm Wire

18AWG shielded security cable 1000ft 2 conductor is the bulk professional format for commercial security contractors, systems integrators, and alarm companies who need a full 1000-foot roll of shielded two-conductor cable for multi-zone alarm systems, sensor networks, CCTV installations, and monitoring device wiring. This white pull box delivers 18AWG stranded copper conductors, an aluminum foil shield with drain wire, and a durable PVC jacket — all in the high-quantity format that eliminates mid-project cable change-outs and lowers per-foot installed cost on large commercial deployments.

Furthermore, this cable is manufactured in compliance with NEC Article 725 for power-limited Class 3 security and signaling circuits (nofollow). As a result, it is suitable for installation in finished wall cavities, conduit, surface raceway, and cable tray throughout commercial buildings, multi-family residential structures, and light industrial facilities where power-limited alarm wiring does not require a plenum-rated jacket. Consequently, commercial security contractors and alarm systems integrators can specify this 18AWG shielded security cable 1000ft 2 conductor with confidence as the default zone wiring cable across their full commercial project portfolio.

Key Features of Our 18AWG Shielded Security Cable 1000ft 2 Conductor

• 1000ft Pull Box — Commercial-Scale Coverage in a Single Roll: The 1000ft format is the defining advantage of this 18AWG shielded security cable 1000ft 2 conductor for commercial project work. A full commercial floor of alarm zone wiring — door contacts, motion sensors, glass breaks, smoke detectors, and PIR devices — can often be rough-in completed from a single 1000ft box without a cable change-out. Moreover, the 1000ft format delivers the lowest per-foot material cost in the 52Networks shielded alarm cable range, directly improving project margin on high-zone-count commercial deployments.
• Aluminum Foil Shield with Drain Wire: The overall aluminum foil shield encloses both conductors with a bare copper drain wire for single-point grounding at the alarm panel or head-end controller. This shield provides 100% EMI and RFI suppression against fluorescent ballasts, LED drivers, wireless transmitters, HVAC control wiring, and other interference sources that increasingly share building wall and ceiling pathways with security wiring. Furthermore, the drain wire ensures the shield can be properly grounded to eliminate ground loops that would otherwise trigger nuisance faults on zone supervision circuits.
• 18AWG Stranded Copper Conductors: Two 18AWG stranded copper conductors deliver reliable, low-resistance signal transmission for every security zone device type — door contacts, motion sensors, glass break detectors, heat detectors, hold-up buttons, and annunciator panel connections. Stranded construction routes through wall cavities, conduit bends, and device backboxes without fatiguing or fracturing, making installation faster and more reliable than solid wire on multi-bend commercial runs. Additionally, stranded wire terminates cleanly under screw terminals and push-in connectors on all major residential and commercial alarm panel brands.
• 2-Conductor Format — Direct Specification for Zone Circuits: The two-conductor configuration on this 18AWG shielded security cable 1000ft 2 conductor matches the standard Class B initiating device circuit (IDC) architecture used by conventional and addressable alarm panels worldwide. Each zone requires exactly two conductors from the panel to the end-of-line device, making this cable the direct, no-conversion-required specification for every standard alarm zone in a commercial building. As a result, specifying this cable eliminates the conductor waste that comes from using 4-conductor cable on two-wire zone runs.
• Durable White PVC Jacket: The white PVC outer jacket is resistant to wear, moisture, mechanical abrasion, and environmental stress in both indoor and protected installation environments. Furthermore, the white jacket color is the commercial security industry standard for alarm zone wiring in office buildings, retail spaces, and mixed-use commercial properties — providing a clean, professional appearance that building owners and AHJs expect.
• Suitable for Alarm Systems, CCTV, and Monitoring Devices: This 18AWG shielded security cable 1000ft 2 conductor is confirmed suitable for burglar alarm systems, fire alarm signaling, smoke and heat detectors, CCTV camera signal and power circuits, and monitoring device wiring. Consequently, one cable SKU serves every major two-conductor security system circuit type, simplifying procurement and warehouse management for security contractors.
• Indoor and Protected Outdoor Installation: The PVC jacket construction makes this cable appropriate for installation in finished wall cavities, conduit, surface-mount raceway, and protected outdoor locations where the cable is shielded from direct UV and weathering. As a result, it covers the full range of installation environments on a typical mixed-use commercial or residential security project.
• Tangle-Free 1000ft Pull Box: The pull box format delivers tangle-free payout throughout the entire 1000-foot roll, eliminating the time lost on busy commercial job sites to managing kinked or bird-nested cable. Therefore, installation crews can maintain pull speed on high-zone-count rough-in days without stopping to clear tangles.

Why Choose This 18AWG Shielded Security Cable 1000ft 2 Conductor for Your Commercial Project?

Commercial security projects require cable in quantities that residential 500ft boxes cannot support efficiently. This 18AWG shielded security cable 1000ft 2 conductor is the professional’s answer to that challenge — a full 1000-foot roll that typically covers an entire commercial floor of zone wiring without stopping to change boxes, without creating a splice point in a junction box, and without ordering a second roll mid-project. The cost-per-foot savings versus two 500ft boxes translate directly into measurable project margin improvement on every multi-floor commercial alarm rough-in. Moreover, the 1000ft format eliminates the material waste that accumulates from partial rolls when smaller boxes are used on runs of inconsistent length. Additionally, the ANSI/TIA-570-D cabling standard for residential and light commercial installations (nofollow) specifically recommends minimizing splices on security circuits to preserve supervision circuit integrity — the 1000ft roll inherently satisfies this recommendation for virtually any single-floor zone layout. For commercial projects requiring 4-conductor cable to support access control, intercom, or multi-signal device runs, see our companion product 18/4 Shielded Alarm Security Cable 1000ft White (DoFollow).

The shielded construction on this 18AWG shielded security cable 1000ft 2 conductor is a commercial installation best practice, not an optional upgrade. Modern commercial buildings are densely wired with LED driver circuits, smart lighting controls, wireless access points, cellular signal boosters, and building automation system (BAS) wiring — all of which generate electromagnetic interference across a broad frequency range. Unshielded 18AWG alarm zone wiring in these environments is susceptible to induced interference that manifests as nuisance alarms, zone supervision faults, and false detector triggers that generate costly service calls and damage installer reputation. The aluminum foil shield on this cable blocks that interference at the source, ensuring that zone circuits remain clean and stable throughout the service life of the alarm system. Furthermore, shielded cable is increasingly specified by security panel manufacturers for commercial installations to ensure compliance with their listed system performance parameters. For commercial projects where runs pass through plenum ceiling spaces and require a CL3P or CMP fire-rated jacket, the plenum upgrade option is our 18/2 CL3P CMP Plenum Rated Shielded Cable 500ft White (DoFollow).

The two-conductor, 18AWG specification on this 18AWG shielded security cable 1000ft 2 conductor is the result of decades of standardization in the commercial alarm industry. Every major alarm panel manufacturer — DSC, Honeywell/Resideo, Bosch, Napco, Paradox, and Qolsys — specifies 18AWG or 22AWG stranded copper for zone wiring in their installation manuals, with 18AWG preferred for longer runs and commercial applications where conductor resistance must stay below the panel’s maximum specified threshold. In other words, this cable requires no recalculation, no substitution documentation, and no AHJ discussion — it is the established standard commercial zone wiring specification in an 1000ft bulk format. For the complete range of shielded and unshielded security and alarm cables across all gauges and conductor counts, browse our full Speaker and Security Cable collection (DoFollow).

Frequently Asked Questions

Q: How many commercial alarm zones does a 1000ft roll of 18AWG 2-conductor security cable typically cover?

The number of zones a single 1000ft roll of this 18AWG shielded security cable 1000ft 2 conductor covers depends on the average run length from the panel to each zone device in the building. On a typical single-story commercial building with a centrally located alarm panel, average zone runs fall between 50 and 150 feet, meaning a 1000ft roll covers between 7 and 20 complete zone circuits. On a multi-story building with distributed zone wiring from a riser-mounted panel on each floor, shorter average runs of 30 to 80 feet allow a single roll to cover 12 to 33 zone circuits per floor. Additionally, using a home-run zone architecture — where each device runs directly back to the panel — uses more cable per zone than a daisy-chain layout, but provides superior zone integrity and faster fault isolation. Consequently, commercial security contractors typically calculate cable quantity based on a site walk and zone schedule, with 1000ft rolls as the standard procurement unit for commercial projects.

Q: Is this 18AWG 2-conductor shielded cable compatible with both conventional and addressable alarm panels?

Yes — this 18AWG shielded security cable 1000ft 2 conductor is compatible with both conventional zone-based alarm control panels and modern addressable systems. Conventional panels use Class B two-conductor IDC zone circuits that require exactly two conductors from the panel to each end-of-line device — a perfect match for this cable’s two-conductor format. Addressable systems using individual device addresses on a signaling line circuit (SLC) also commonly use 18AWG or 22AWG two-conductor wiring for device home runs on systems that do not use a shared bus architecture. Furthermore, 18AWG provides lower DC resistance than 22AWG wire, extending the maximum allowable run length before the panel’s end-of-line supervision resistor calculation is affected. As a result, this cable works across all alarm system generations and architectures without requiring any gauge adjustment or resistance compensation on standard commercial zone run lengths.

Q: What is the advantage of shielded over unshielded cable for commercial security zone wiring?

Shielded cable like this 18AWG shielded security cable 1000ft 2 conductor protects the zone circuit conductors from external electromagnetic and radio frequency interference that can induce voltage onto unshielded wiring, causing zone supervision faults and nuisance alarms that appear random and are extremely difficult to diagnose in a finished commercial building. Commercial buildings present a much higher EMI risk environment than residential homes because they contain dense LED lighting with high-frequency switching drivers, building automation system (BAS) wiring, wireless access point infrastructure, cellular signal booster antennas, and elevator motor drives — all of which generate broadband interference. Moreover, commercial alarm system service calls are significantly more expensive than residential ones, both in direct labor cost and in client relationship impact. Therefore, the incremental cable cost of shielded over unshielded construction on a commercial project is typically recovered in the avoidance of a single nuisance-alarm service call, making shielded cable the economically correct specification for every new commercial alarm installation.

18AWG shielded security cable 1000ft 2 conductor from 52Networks delivers commercial-scale EMI protection, stranded copper reliability, and a full 1000ft bulk roll for every large-format alarm system installation. Order today and keep a roll on your service van and job site ready for your next multi-zone commercial rough-in.