[{"data":1,"prerenderedAt":229},["ShallowReactive",2],{"guide-low-voltage-system-design-nyc-en-US":3},{"guide":4,"related":209},{"title":5,"seoTitle":6,"description":7,"summary":8,"sections":9,"faq":165,"date":181,"service":182,"order":183,"sources":184,"slug":207,"locale":208},"Designing a low-voltage system for NYC buildings under the 2025 Electrical Code","Low-Voltage System Design in NYC","One cabling plan for network, cameras, intercom, access control and audio, plus the 2025 NYC Electrical Code rules on permits and licensed work.","A low-voltage system works best when network, cameras, intercom, access control and audio are designed together, with shared pathways, one equipment closet, one labeling scheme and one set of drawings. Since December 21, 2025, the NYC Electrical Code exempts most wiring under 50 volts from electrical permits when a licensed electrician or qualified person performs it. Life-safety connections and controls that switch light, heat or power still require a licensed master or special electrician.",[10,14,67,75,118,129,136,143],{"heading":11,"paragraphs":12},"Why one plan works better than separate vendors",[13],"When the internet provider, alarm company, camera installer, audio installer and intercom vendor each run their own cable, the result is duplicated pathways, unsealed penetrations and walls full of cable that nobody can identify. The NYC Electrical Code requires the accessible portion of abandoned low-voltage, communications and fiber cable to be removed (sections 725.25, 800.25 and 770.25), and cable kept for future use must carry a durable tag. A single design avoids that cleanup and gives the owner one record of the whole system.",{"heading":15,"table":16},"System inventory",{"caption":17,"head":18,"rows":23},"Typical low-voltage systems in a home or small building",[19,20,21,22],"System","Typical cable","Power","Head end",[24,29,34,39,44,49,54,59,63],[25,26,27,28],"Data and Wi-Fi","Cat6 or Cat6A, fiber backbone between floors","PoE for access points","Network rack",[30,31,32,33],"IP cameras","Cat6A, outdoor-rated where exposed","PoE (802.3af or 802.3at; some PTZ cameras need 802.3bt)","Recorder (NVR) in the rack",[35,36,37,38],"Video intercom or doorbell","Cat6 for IP systems, or existing 2-wire for 2-wire IP systems","PoE or 24 V","Rack or riser",[40,41,42,43],"Access control","Composite cable for reader, lock power, door contact and request-to-exit, or Cat6 for IP readers","12 or 24 V lock power supply with battery","Controller at the door or in the rack",[45,46,47,48],"Distributed audio","16 or 14 AWG, CL2 or CL3 rated","Amplifier","Rack",[50,51,52,53],"Intrusion alarm","22\u002F4 and 22\u002F2 cable, or wireless sensors, with a cellular communicator","Panel power supply with battery","Alarm panel",[55,56,57,58],"Fire alarm","FPLR or FPLP, installed separately","Fire alarm panel","Licensed electrician and FDNY approval; outside the low-voltage scope",[60,61,62,48],"Television","RG6 coaxial, where still needed","None",[64,65,66,66],"Smart home and HVAC controls","Cat6 or thermostat cable","Varies",{"heading":68,"list":69},"Pathways, conduit and the equipment closet",[70,71,72,73,74],"Install empty conduit of at least 1 to 1.25 inches, larger for Cat6A bundles, between floors, from the rack to the attic or roof, from the rack to the internet service entrance, to each television wall, and to garages, yards and accessory buildings. Leave a pull string and cap the ends.","Keep bends gentle and add pull points on long runs, so cable can be pulled later without damage.","In multifamily buildings, install riser sleeves with listed firestop at each floor, and plan a dedicated low-voltage closet stack separate from the electrical room.","In NYC, communications, fiber and coaxial equipment cannot be installed in an electrical equipment room (sections 805.133(C), 770.133(E) and 820.133(C)), so the network rack, recorder and ISP equipment need their own space.","Give the closet a dedicated circuit installed by a licensed electrician, battery backup for critical equipment, and ventilation sized for the heat of PoE switches and recorders.",{"heading":76,"paragraphs":77,"table":80,"after":115},"NYC rules after Local Law 128 of 2024",[78,79],"The 2025 NYC Electrical Code, adopted by Local Law 128 of 2024 and effective December 21, 2025, is the 2020 edition of the National Electrical Code with NYC amendments, now located in Title 28 of the Administrative Code. It defines low-voltage electrical work as wiring designed to operate at less than 50 volts for signaling, communication, alarm and data transmission circuits.","Section 28-105.4.7 exempts that work from electrical permits when a licensed master electrician, special electrician or qualified person performs it. Wiring that connects to, is part of or is located within life-safety systems (including fire alarm), circuits in hazardous locations, intrinsically safe systems, or a point of connection to a control circuit that activates light, heat or power circuits must be performed by a licensed master or special electrician. The Department of Buildings may add other systems by rule.",{"caption":81,"head":82,"rows":86},"Technical rules that still apply to low-voltage work in NYC",[83,84,85],"Topic","Requirement","NYC Electrical Code section",[87,91,95,99,103,107,111],[88,89,90],"Separation from power","At least 2 inches from power conductors unless the power wiring is in raceway or NM, MC, AC or UF cable, the low-voltage cable is in raceway, or a fixed nonconductor separates them","725.136(I), 820.133(A)(2)",[92,93,94],"Cable fire ratings","General-purpose CM, CL2 or CL3; riser-rated CMR, CL2R or CL3R in vertical shafts; plenum-rated CMP, CL2P or CL3P in plenums; a higher rating may replace a lower one","Articles 725 and 800",[96,97,98],"Supports for exposed cable","Approved non-combustible straps, staples, ties or hangers","725.24, 800.24",[100,101,102],"Abandoned cable","Accessible abandoned cable removed; cable kept for future use tagged","725.25, 770.25, 800.25",[104,105,106],"Electrical equipment rooms","No communications, fiber or coaxial equipment or cabling, with narrow exceptions","805.133(C), 770.133(E), 820.133(C)",[108,109,110],"Elevator hoistways","Class 2 and Class 3 cable in rigid metal conduit, IMC or EMT","725.136(H)",[112,113,114],"Firestopping","Penetrations of fire-rated walls and floors sealed with a listed firestop system","300.21, 800.26, 770.26",[116,117],"The permit exemption does not remove the technical rules, and the Department of Buildings can still inspect the work. NYC Buildings Bulletin 2020-001, issued under the previous code, clarified that firestopping is not electrical work and may be installed by people other than licensed electricians, so the low-voltage team can seal its own penetrations with listed systems.","Long Island jobs follow the 2025 New York State Uniform Code, in effect since December 31, 2025, and local inspection agencies. Where the 2023 NEC applies, cable types and substitutions moved from Article 725 to Article 722, so we confirm the edition with the inspection agency. Intrusion alarm installation in New York State is licensed by the Department of State under General Business Law Article 6-D, and we coordinate that portion with a licensed alarm company.",{"heading":119,"paragraphs":120,"list":123,"after":127},"Intercom and entry in multifamily buildings",[121,122],"Under Multiple Dwelling Law section 50-a and DOB rule 1 RCNY 42-01, Class A multiple dwellings with eight or more apartments must have automatic self-closing and self-locking entrance doors and an intercommunication system at the main entrance. The rule sets the minimum as a bell or buzzer system, or a voice system between each apartment and the entrance, with a return buzzer that releases the door. The obligations that apply to a specific building are a question for its attorney or managing agent.","Older buildings often have audio intercom wiring in the risers that still has value. The upgrade path depends on the condition of that wiring and on the residents.",[124,125,126],"A 2-wire IP system reuses the existing riser wiring and avoids opening walls in occupied apartments.","An app-based video intercom lets residents answer on their phones without apartment stations, with a telephone or cellular fallback for residents who do not use smartphones.","A full IP system with Cat6 to each unit suits gut renovations and new construction.",[128],"Electric strikes and magnetic locks must be specified as fail-safe or fail-secure according to egress requirements. Any connection to the fire alarm for door release is work for a licensed electrician and the fire alarm vendor, and door hardware is designed with the architect or code consultant.",{"heading":130,"list":131},"Security cameras",[132,133,134,135],"Use wired PoE cameras that record to a local network video recorder, with cloud backup as an option. Police departments in Los Angeles and New Jersey have warned that burglars use Wi-Fi jammers to disable wireless cameras, and they recommend hard-wired systems.","Place the recorder indoors in a secured location on battery backup. A recorder that can be removed takes the footage with it.","Aim cameras at your own property and away from neighbors' windows. Audio recording raises questions under New York's eavesdropping law (Penal Law section 250.05), so we configure video only by default and recommend legal advice before audio is enabled.","In multifamily buildings, notify residents according to the lease and building policy, and consult the managing agent or attorney about notice requirements.",{"heading":137,"list":138},"Labeling, testing and documentation",[139,140,141,142],"Label every cable at both ends with a machine-printed identifier that matches the jack and the patch panel port, such as 2F-BR2-01, following TIA-606 practice.","Prepare an as-built drawing with every drop location, and photograph open walls with a tape measure in view.","Keep a patch panel schedule, an equipment list with serial numbers and firmware versions, warranty documents, and administrator credentials held by the owner.","Test every run for wire map and length at minimum; commercial Cat6A installations receive certification test reports.",{"heading":144,"table":145,"after":163},"Phase-by-phase design checklist",{"caption":146,"head":147,"rows":150},"Low-voltage tasks for owners and architects by project phase",[148,149],"Phase","Tasks",[151,154,157,160],[152,153],"Schematic design","List every system, choose the closet location away from the electrical room, mark conduit routes, and identify work that needs a licensed electrician",[155,156],"Rough-in","Install conduit, boxes and cable; firestop penetrations; schedule a low-voltage walkthrough and photographs before drywall",[158,159],"Trim","Terminate, label and test; mount devices; configure the network, recorder and intercom",[161,162],"Turnover","Deliver the as-built drawing, patch schedule, test results, equipment list and credentials",[164],"We prepare one combined low-voltage layout for network, cameras, intercom, access control and audio from your plans or a sketch, coordinate it with your electrician and general contractor, and install it with our licensed partner contractors under a single estimate.",[166,169,172,175,178],{"q":167,"a":168},"Is a permit required to install security cameras in NYC?","Camera cabling under 50 volts does not require an electrical permit under the 2025 NYC Electrical Code when a licensed electrician or qualified person does the work. New outlets or circuits, and any connection to life-safety systems, are work for a licensed electrician.",{"q":170,"a":171},"Can a low-voltage contractor install access control?","Readers, door contacts and controllers are low-voltage work. When the locks connect to the fire alarm for door release, or the system switches light, heat or power circuits, a licensed master or special electrician must perform that part.",{"q":173,"a":174},"Does my building need an intercom?","Class A multiple dwellings with eight or more apartments must have self-locking entrance doors and an intercommunication system under Multiple Dwelling Law section 50-a and 1 RCNY 42-01. Confirm the obligations for your building with your attorney or managing agent.",{"q":176,"a":177},"What does 弱电 mean?","弱电 (weak current) is the Chinese term for low-voltage systems: data networks, Wi-Fi, cameras, intercom, access control, audio and similar systems. Chinese-speaking owners and contractors use it the way English speakers use low voltage.",{"q":179,"a":180},"Is it worth installing conduit for the future?","Yes, during a renovation or new build. Empty conduit with a pull string between floors, to the roof, to the service entrance and to television walls allows new cable to be added later without opening finished walls.","2026-10-25","low-voltage",72,[185,189,193,196,199,203],{"title":186,"url":187,"publisher":188},"Local Law 128 of 2024 (2025 New York City Electrical Code)","https:\u002F\u002Fwww.nyc.gov\u002Fassets\u002Fbuildings\u002Flocal_laws\u002Fll128of2024.pdf","NYC Department of Buildings",{"title":190,"url":191,"publisher":192},"Repeal of Rules Relating to the Electrical Code","https:\u002F\u002Frules.cityofnewyork.us\u002Frule\u002Frepeal-of-rules-relating-to-the-electrical-code\u002F","NYC Rules",{"title":194,"url":195,"publisher":188},"Buildings Bulletin 2020-001","https:\u002F\u002Fwww.nyc.gov\u002Fassets\u002Fbuildings\u002Fbldgs_bulletins\u002Fbb_2020-001.pdf",{"title":197,"url":198,"publisher":188},"1 RCNY 42-01 Entrance Doors, Locks and Intercommunication Systems","https:\u002F\u002Fwww.nyc.gov\u002Fassets\u002Fbuildings\u002Frules\u002F1_RCNY_42-01.pdf",{"title":200,"url":201,"publisher":202},"Firestopping: A point of reference between the National Electrical Code and the International Building Code","https:\u002F\u002Fiaeimagazine.org\u002Fstandards\u002Ffirestopping-a-point-of-reference-between-the-national-electrical-code-and-the-international-building-code\u002F","IAEI Magazine",{"title":204,"url":205,"publisher":206},"NJ police warning: Burglars using Wi-Fi jammers to disable home security, 911 calls","https:\u002F\u002Fwww.fox5ny.com\u002Fnews\u002Fnj-crime-police-warning-burglars-wi-fi-jammers","FOX 5 New York","low-voltage-system-design-nyc","en-US",[210,216,220,225],{"slug":211,"title":212,"description":213,"service":214,"date":215},"nyc-renovation-permits","NYC permits for renovation, electrical and plumbing work","Which renovation, electrical and plumbing jobs need a NYC Department of Buildings permit, who files it, and what changes on Long Island.","electrical","2026-10-24",{"slug":217,"title":218,"description":219,"service":214,"date":215},"electrical-panel-upgrade","Electrical panel and service upgrades for NYC and Long Island homes","When an older NYC or Long Island home needs a new panel or a bigger electrical service, what the work involves, and how long it takes.",{"slug":221,"title":222,"description":223,"service":224,"date":181},"ev-charging-without-service-upgrade","EV charging without an expensive service upgrade","Load sharing, CT-clamp load management, dryer-outlet sharing and right-sized chargers: ways to add EV charging in NYC and Long Island without upgrading your electrical service.","ev-charging",{"slug":226,"title":227,"description":228,"service":224,"date":215},"ev-charger-installation","Installing a home EV charger in NYC or Long Island","Level 1 vs Level 2 charging, panel capacity, permits, Tesla Powershare, and what to know for houses and buildings in NYC and Long Island.",1792924280051]