{"product_id":"18-3-low-voltage-security-sound-alarm-cable-900-ft-plenum-rated-cmp","title":"18\/3 Low Voltage Security Sound Alarm Cable 900 ft - Plenum Rated CMP","description":"\u003cp\u003eOur review of the 18\/3 Low Voltage Security Sound Alarm Cable finds it best suited for installers and facility managers who need a reliable, plenum-rated control cable for fire alarm, security, and intercom systems; the single biggest reason to buy is its combination of \u003cstrong\u003eCMP plenum rating\u003c\/strong\u003e and full aluminum foil shielding, which together keep signals clear while meeting the stricter fire safety requirements for ceiling plenums and air handling spaces.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple applications:\u003c\/strong\u003e Works for fire alarm, security burglar alarm, public address, intercoms, telephone stations and other low-voltage power-limited circuits, giving installers a versatile cable for many site needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePure copper conductors:\u003c\/strong\u003e Stranded bare copper conductors provide consistent conductivity and flexibility for routing through walls and conduit without excessive stiffness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminum foil shielding:\u003c\/strong\u003e The foil shield limits electromagnetic interference so sensitive signals remain clear for communications and instrumentation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCMP plenum-rated:\u003c\/strong\u003e The plenum rating means the jacket meets higher flame and smoke standards, making it appropriate for ceiling plenums and air distribution spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e300V CL3 rating:\u003c\/strong\u003e The 300V insulation and CL3 classification ensure it is suitable for Class 3 power-limited low-voltage installations such as access control and thermostats.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis cable is aimed at professional electricians, AV integrators, and building maintenance teams who need a single, compliant cable for alarm, voice and low-voltage control runs in commercial or multi-family buildings. Its plenum rating and shielding make it a practical choice where code requires plenum-rated materials and where electromagnetic interference could be a concern.\u003c\/p\u003e\n\u003cp\u003eHome users with simple runs that do not require plenum-rated cable may find less expensive non-plenum alternatives adequate; likewise, projects requiring very heavy-gauge conductors or mains voltage distribution should look for a cable designed for those specific electrical loads.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGood build quality with stranded \u003cstrong\u003ebare copper conductors\u003c\/strong\u003e that balance conductivity and flexibility.\u003c\/li\u003e\n\u003cli\u003eEffective \u003cstrong\u003ealuminum foil shielding\u003c\/strong\u003e that customers report keeps signals clean and minimizes noise.\u003c\/li\u003e\n\u003cli\u003ePlenum-rated CMP jacket offers higher flame resistance for use in air-handling spaces.\u003c\/li\u003e\n\u003cli\u003eWorks across many low-voltage applications, making it a versatile stock cable for installers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome customers describe the cable as relatively thin in overall thickness, which may concern users expecting heavier insulation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eConductor\u003c\/td\u003e\n\u003ctd\u003eStranded bare copper, 18 AWG, 3 conductors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e900 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShielding\u003c\/td\u003e\n\u003ctd\u003eAluminum foil shield\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRatings\u003c\/td\u003e\n\u003ctd\u003eCMP plenum rated, CL3P, FPLP, FT6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e300V (low-voltage CL3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eFire alarm, security, PA, intercoms, telephone, access control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 18\/3 Low Voltage Security Sound Alarm Cable is a solid choice for commercial installs that require \u003cstrong\u003eplenum-rated cable\u003c\/strong\u003e and reliable shielding; it delivers good conductivity and versatility across alarm and communication systems while offering value for installers who stock a single multiuse cable.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this cable safe for plenum spaces?\u003c\/strong\u003e\u003cbr\u003eYes. It is CMP plenum rated and designed for use in ceiling plenums and air handling spaces where higher flame and smoke standards apply.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the shielding stop interference in audio and alarm lines?\u003c\/strong\u003e\u003cbr\u003eThe aluminum foil shield helps prevent EMI from disrupting signals and customers report improved clarity in communications and LED lighting control runs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this cable power devices directly?\u003c\/strong\u003e\u003cbr\u003eIt is a 300V CL3 rated, power-limited low-voltage cable suitable for Class 3 devices like access control and thermostats, but not intended for mains voltage power distribution.\u003c\/p\u003e","brand":"Syston Cable Technology","offers":[{"title":"Default Title","offer_id":48185204605147,"sku":"B0C7HVGW4S","price":265.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/616nn7zQrdL._SL1500.jpg?v=1769696888","url":"https:\/\/gearmusthave.com\/products\/18-3-low-voltage-security-sound-alarm-cable-900-ft-plenum-rated-cmp","provider":"GearMustHave","version":"1.0","type":"link"}