Threaded IMC intermediate metal conduit, thicker than EMT, for demanding industrial and outdoor electrical installations.
Tell us the reference or key specification (current, power, gauge, size), quantity and city — a technical advisor sends your quote the same business day.
IMC is intermediate metal conduit of galvanized steel, threaded, per UL 1242 / ANSI C80.6, with a thicker wall than EMT and lower weight than rigid metal conduit (RMC). It is installed per NTC 2050 article 342, in 3.05 m lengths with tapered NPT threads.
| Trade size | Metric designator (NTC 2050 / NEC) |
|---|---|
| 1/2" | 16 |
| 3/4" | 21 |
| 1" | 27 |
| 1-1/4" | 35 |
| 1-1/2" | 41 |
| 2" | 53 |
| 2-1/2" | 63 |
| 3" | 78 |
| 3-1/2" | 91 |
| 4" | 103 |
IMC is manufactured in trade sizes 1/2" to 4", in 3.05 m (10 ft) lengths with tapered NPT thread per ASME B1.20.1.
IMC conduit is an intermediate metal raceway, threaded and thicker than EMT, used for industrial electrical installations where higher mechanical strength, better protection for the wiring run and performance in demanding or outdoor environments are required. At TECTUL it is quoted as an industrial line for projects that should not be solved with light-duty conduit when the environment, exposure or technical specification calls for a more robust raceway. It differs from EMT conduit because IMC allows threaded couplings and offers a heavier body for runs exposed to impact, weather or installation demands; and it differs from flexible conduit because it remains a rigid raceway for main runs, not a moving final connection. Selection should consider environment, electrical continuity, threaded fittings, compatible boxes, corrosion protection and design requirements according to RETIE and NTC 2050. It should not be chosen on price alone: its justification lies in mechanical risk, durability, joining method and actual installation conditions.
We dispatch to Bogotá, Medellín, Cali, Barranquilla and all of Colombia. Request a quote via WhatsApp for threaded IMC conduit with diameter, fittings, quantities, environment and delivery city.
| Type | Standard | Joint | Use |
|---|---|---|---|
| EMT (thin wall) | UL 797 / ANSI C80.3 | Set-screw or compression | Exposed indoor runs |
| IMC (intermediate) | UL 1242 / ANSI C80.6 | Threaded NPT | Outdoor and mechanically demanding runs |
| RMC (rigid) | UL 6 / ANSI C80.1 | Threaded NPT | Maximum mechanical protection |
IMC is certified under UL 1242 with ANSI C80.6 dimensions, in 3.05 m lengths and tapered NPT thread of 3/4 inch per foot. It offers the same threaded installation as rigid conduit with less weight per meter.
It depends on diameter, fittings, quantities and delivery city. TECTUL quotes each project via WhatsApp without inventing standard prices.
It is used as a rigid electrical raceway in demanding industrial installations, exposed runs or points where greater mechanical protection than EMT is required.
IMC is more robust and threaded. EMT is lighter and is used in exposed runs with compatible fittings when the environment allows it.
It is cut, threaded, the end is protected, it is connected with threaded fittings, supported according to design and continuity is verified before final wiring.
Send diameter, length or number of conduits, threaded fittings, delivery city, installation environment and any project specification you have.
IMC allows the same threaded uses with lower weight per meter (manufacturer catalogs), so it is usually preferred unless the project specification expressly calls for full-wall RMC.
Yes: it is galvanized and threaded, fit for outdoor and exposed installations per NTC 2050 article 342, using threaded fittings with proper sealing.
Updated: July 22, 2026
