18AWG 2-Conductor Alarm Security Cable – Shielded Stranded 500ft Pull Box White
Original price was: $124.99.$114.99Current price is: $114.99.
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Description
18 AWG Shielded Alarm Cable – Professional 2-Conductor 500ft
The 18 AWG shielded alarm cable is purpose-built for security systems, fire alarms, intrusion detection, and access control circuits where signal integrity and noise immunity are critical. With integrated shielding, stranded copper conductors, and professional-grade construction, this cable delivers reliable sensor signaling and alarm device wiring without the EMI interference that causes false triggers and system failures.
Whether you’re installing a comprehensive security system in a high-rise commercial building, upgrading an existing alarm network, or integrating multiple sensor circuits in an electrically noisy environment, this alarm cable provides the noise rejection professionals demand. The 500ft white spool offers ample coverage for mid-to-large installations—all with the shielding necessary to protect alarm circuit integrity against interference from power lines, HVAC systems, and wireless networks.
Key Features & Benefits
- Engineered for Alarm & Security Applications – Specifically designed for door contacts, motion sensors, glass break detectors, control modules, and alarm device signaling. Meets all security installer specifications for reliable circuit performance.
- Integrated EMI Shielding – Tinned copper braid shield blocks electromagnetic interference from power equipment, HVAC systems, wireless networks, and RF sources. Eliminates false alarms caused by electrical noise interference—critical for maintaining system reliability and customer trust.
- Stranded Copper Conductors – Multi-strand construction provides superior flexibility for routing through walls, conduit, and tight spaces. Bare copper ensures maximum conductivity with minimal signal loss over long alarm circuit runs.
- Professional 500ft White Spool – Industry-standard white color for easy circuit identification and tracking. Right-sized for commercial retrofit projects without excess inventory or waste. Clean spool design suitable for professional on-site storage.
- Easy Termination & Installation – Stranded conductors terminate cleanly to barrier strips, screw terminals, and connectors without special tools or crimping equipment. Compatible with standard alarm control panels and security system equipment.
- Superior Noise Immunity – Shielding specifically protects alarm circuits from electrical noise that triggers false alarms. Maintains signal clarity even when routed alongside power cables or near RF equipment.
- Durable Commercial-Grade Construction – High-quality insulation resists moisture and temperature fluctuation. Outer jacket engineered for indoor and conduit installation (40–90°F standard). Superior tensile strength handles professional installation demands.
- Industry-Standard Specification – Used by leading security companies, alarm integrators, and security equipment manufacturers nationwide. When security professionals need reliable alarm cable, this is the specification they choose.
Technical Specifications
| Specification | Details |
|---|---|
| Product Type | 18 AWG Shielded Alarm Cable, 2-Conductor, Stranded Copper |
| AWG Rating | 18 American Wire Gauge |
| Conductor Count | 2 independent conductors |
| Conductor Material | Bare stranded copper (high conductivity) |
| Strand Configuration | 16 strands per conductor for maximum flexibility |
| Shield Type | Tinned copper braid (360° EMI coverage) |
| Shield Coverage | 90%+ braid coverage for noise rejection |
| Insulation Material | Polyethylene (moisture-resistant) |
| Jacket Material | PVC (durable, UV-resistant) |
| Jacket Color | White (industry-standard for alarm circuits) |
| Operating Temperature | 40°F to 90°F (indoor, conduit installation) |
| Outer Diameter | 0.18″–0.20″ (4.6mm–5.0mm) |
| Jacket Thickness | 0.020″–0.030″ |
| Length | 500 feet (152 meters) |
| Spool Weight | Approx. 18–20 lbs |
| Tensile Strength | 50–60 lbs per conductor pair |
| Minimum Bend Radius | 1.5″–2.0″ (stranded flexibility) |
| Impedance | 50–75Ω (standard alarm circuits) |
| Velocity of Propagation | 66% nominal |
| Installation | In-wall, conduit, above-ceiling |
| Standards Compliance | Security system and alarm industry standards |
Application & Installation
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The 18 AWG shielded alarm cable is the professional choice for:
- Door Contact & Window Sensors – Wiring door/window magnetic switches and reed sensors with reliable signal transmission and false-alarm immunity.
- Motion Detection Systems – Microwave and passive infrared motion detector circuits routed through electrically noisy environments without false triggers.
- Glass Break Detectors – Vibration sensor wiring that demands noise-free signal transmission for accurate detection.
- Fire Alarm Loops – Addressable fire alarm device circuits and zone signaling with EMI protection in commercial buildings.
- Access Control Systems – Reader circuits, door strike wiring, and control signaling for card access and electronic locks.
- Alarm Control Panel Signaling – Reliable wiring between control modules, keypads, sirens, and device branches.
- CCTV & Video Surveillance – Auxiliary control circuits for camera pan/tilt and lens control with minimal noise.
- Intercom & Communications – Two-way signaling and control wiring for facility communications.
Installation advantages:
- Tight bends and flexible routing (stranded construction)
- Easy termination to standard alarm panel connectors
- White color simplifies circuit identification and troubleshooting
- Compatible with all major security system platforms
- Professional appearance passes inspection
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Why Shielding Matters for Alarm Systems
False alarms are expensive—they damage customer trust, trigger costly response fees, and degrade system reputation. Unshielded alarm cable routing near power lines, HVAC equipment, or wireless networks picks up electrical noise that triggers false triggers.
Our 18 AWG shielded alarm cable eliminates this problem. The tinned copper shield actively rejects electromagnetic interference, ensuring:
- Reliable Sensor Signaling – Door contacts, motion sensors, and glass breaks transmit clean signals without noise-induced false triggers
- Long-Distance Circuit Integrity – Shielding maintains signal quality over 500+ feet without signal degradation
- Compatibility with Complex Buildings – Routing near power cables, HVAC ducts, and wireless equipment without noise interference
- Professional System Reliability – Reduced false alarms = higher customer satisfaction and system uptime
Quality Assurance & Professional Reliability
Every 18 AWG shielded alarm cable spool is sourced from manufacturers certified to security industry standards. Our verification process includes:
- 100% Conductor Continuity Testing – End-to-end verification of circuit integrity and shield ground continuity
- Insulation Resistance Measurement – Electrical testing confirms jacket and shield integrity
- Shield Effectiveness Testing – EMI attenuation verification across alarm and security frequency ranges
- Mechanical Strength Inspection – Tensile strength and bend-radius testing ensures professional installation durability
- Color & Specification Verification – White jacket color confirmation and conductor count inspection
Professional Installer Confidence: This cable is specified by the nation’s leading security companies, alarm integrators, and professional installers. When security professionals need noise-free alarm signaling, they trust this cable for critical installations.
Why Choose Our 18 AWG Shielded Alarm Cable?
- False Alarm Prevention – Shielding eliminates electrical noise that triggers unwanted alarms
- Professional Reliability – Specified by major security companies and integrators nationwide
- Easy Installation – Stranded construction + standard termination = faster deployment
- Long-Distance Capability – 500ft spool covers most commercial projects without splicing
- Industry-Standard White Color – Simplifies circuit identification and professional appearance
Frequently Asked Questions
Q: Why is shielding important for alarm cable?
A: Unshielded cable picks up electrical noise from power lines, HVAC equipment, and wireless systems—causing false alarms. Shielding actively rejects this interference, ensuring reliable sensor signaling. Professional security installations always use shielded cable in electrically complex buildings.
Q: Can I use this for other low-voltage applications?
A: Yes. While optimized for alarms, this cable works for any shielded 2-conductor low-voltage application: audio circuits, control signaling, sensor wiring, intercom systems, etc. The 18 AWG gauge is suitable for 24V control circuits and sensor loops up to approximately 100 feet.
Q: How tight can I bend this cable?
A: Stranded construction allows bends to approximately 1.5–2 inches minimum radius. This is significantly tighter than solid-conductor cable, making routing through walls, conduit, and tight spaces easier.
Q: Is this plenum-rated?
A: No. This is standard alarm cable for in-wall and conduit installation only. For above-drop ceiling plenum spaces, specify CL3P or CMP plenum-rated cable. For standard wall/conduit routing in commercial buildings, this alarm cable is appropriate.
Q: What gauge is each conductor?
A: Each conductor is 18 AWG. This is suitable for 24V alarm circuits, sensor signaling, and control loops. Check your alarm control panel documentation for conductor gauge requirements on your specific equipment.
Q: How do I terminate the stranded conductors?
A: Stranded copper accepts screw terminals, barrier strips, push-in connectors, and crimp terminals. Avoid older spring-clip terminals that may not grip stranded wire reliably. Most modern alarm panels are designed for stranded conductor termination.
Q: Can I route this alongside power cable?
A: Yes—that’s exactly why you use shielded cable. The shield protects against electrical noise from adjacent power wiring. Keep distances as large as practical, but shielding handles industry-standard installation scenarios.
Q: What’s the shipping lead time?
A: In-stock. Ships within 1–2 business days. For bulk orders (10+ spools), contact sales for expedited shipping and volume pricing.
Q: Is other lengths available?
A: Yes. We stock 250ft, 500ft, and 1000ft spools. Custom lengths available for large projects. Contact sales for availability and pricing.
Q: What’s your warranty?
A: Full 30-day money-back guarantee on unused, factory-sealed spools. All cable carries a 1-year manufacturer’s defect warranty covering conductor integrity, shielding effectiveness, and physical quality.
Q: Is this compatible with my security system?
A: If your system accepts 18 AWG, 2-conductor cable, this is a direct specification match. Most modern security panels and alarm equipment are designed for this standard. Consult your system manual or contact your panel manufacturer if unsure.
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Ready to Eliminate False Alarms?
Order your 18 AWG shielded alarm cable today and upgrade your security system with professional-grade noise immunity. With integrated EMI shielding, stranded copper flexibility, and 500ft coverage, you’re investing in reliable sensor signaling and system uptime.
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