When managing a complex construction project, general contractors often face a critical decision: Should Divisions 27 and 28—covering communications infrastructure and electronic safety/security systems—be subcontracted directly to a low-voltage integrator, or packaged through the electrical contractor who then subs it out? Both methods are widely used in commercial construction, but each has trade-offs in terms of cost, coordination, communication, and compliance—especially when working with fiber optics, security systems, fire alarms, and structured cabling. This guide breaks down the pros and cons of each strategy, explains what subcontracting Divisions 27 and 28 includes, and outlines when each approach works best. What Are Divisions 27 and 28? In the CSI MasterFormat system, Divisions 27 and 28 encompass critical building technologies often categorized under "low-voltage" but with distinct scopes: Division 27: Communications Structured Cabling (CAT6/CAT6A, Fiber Optics) Data & Voice Networks Wireless Systems & Distributed Antenna Systems (DAS) Telecom Equipment Rooms Cable Pathways & Raceways Rack/Stack, Patch Panels, and Enclosures Division 28: Electronic Safety & Security Fire Alarm Systems (including mass notification) Video Surveillance (CCTV) Access Control & Entry Management Intrusion Detection Intercoms & Paging [...]