What Is Conduit?

Conduit is a hollow tube — made from metal, plastic, or flexible material — that encases electrical wires and low-voltage cables as they travel through a building. Think of it as a protected highway for your cabling. Instead of cables being stapled directly to joists or fished loosely through walls, conduit keeps them organized, shielded from physical damage, and accessible for future changes. It is a fundamental component of any well-planned low-voltage system, including security cameras, access control, structured cabling, and intercom wiring.

Conduit works by providing a continuous enclosed pathway from one point to another — say, from a security camera junction box down to a telecom closet. Cables are pulled through the conduit after it is installed, using a fish tape or pull string. This separation between the cable and the surrounding structure means cables can be replaced or upgraded later by simply pulling out the old cable and pulling in the new one, without cutting into walls. Common types include EMT (Electrical Metallic Tubing), rigid PVC, and flexible conduit (often called "flex" or Sealtite), each suited to different environments and bending requirements.

In New York City, conduit requirements are more stringent than in many other markets. The NYC Department of Buildings (DOB) and the NYC Electrical Code — which largely follows NEC with local amendments — frequently mandate conduit for exposed cable runs in commercial spaces, corridors, mechanical rooms, and any area where cables could be subject to damage or tampering. Building management companies, co-op boards, and commercial landlords almost universally require conduit in common areas and mechanical spaces. For low-voltage work specifically, EMT conduit is the standard in most NYC office buildings, retail spaces, and multi-family residential common areas. In finished residential spaces, PVC or flexible conduit may be acceptable depending on the application.

If you're choosing between running cables in conduit versus a direct "homerun" install without conduit, the deciding factors are usually building type, owner requirements, and future flexibility. Conduit costs more labor up front but pays off dramatically when a cable needs to be replaced or upgraded — a task that otherwise means opening walls. For any commercial installation or building with a hands-on super or property manager, conduit is almost always the right call in NYC.