EMT Electrical Conduit (Extruded Steel/Aluminum)

Extruded steel EMT electrical conduit offers robust protection against impact, chemicals, and temperature fluctuations, making it ideal for industrial applications. Its galvanized surface provides enhanced corrosion resistance. Aluminum EMT, while lighter, provides strong corrosion resistance, making it ideal for outdoor or marine environments where exposure to moisture and salt is common.

Materialien

High-strength cold-rolled steel or 6063-T5 extruded aluminum alloy

Surface Finishes

Hot-dip galvanized, anodized, powder-coated, or mill finish options available

Compliance Standards

Meets UL 797, ANSI, IEC 61386, RoHS, REACH, ISO certifications

Cross-Section Area (A)

Ranges between 1.5–4.5 cm² based on conduit diameter and wall thickness

Mass per Meter (m)

Between 0.9 to 3.5 kg/m depending on material and gauge

Product Description

EMT conduit’s smooth interior and precise extrusion process make cable pulling easier and faster. Steel EMT provides durability with fewer joints, while aluminum EMT’s lightweight design simplifies handling and bending, especially in tight or complex installations. Both materials ensure quick and efficient setup.

Moment of Inertia (Ix / Iy)

Typically 0.0012–0.0085 cm⁴, depends on profile shape and size

Section Modulus (Zx / Zy)

Measures 0.005–0.035 cm³; affects load strength and stiffness

Radius of Gyration (ix / iy)

Between 0.4 to 2.8 cm depending on section geometry

Max. Axial Load (Euler Buckling)

Up to 2,500 kg for steel; 1,500 kg for aluminum conduits

Max. Load at Slot (Shear Test)

Slot shear resistance varies 800–2,200 N based on profile thickness

Torsional Constant (J)

Ranges 0.0005–0.01 cm⁴; affects rotational resistance under torque

Max Torque (Torsional Load Limit)

60–450 N·m before torsional deformation, depending on size and alloy

Elastic Deflection (100 N Load)

<1.5 mm (steel), <2.5 mm (aluminum) deflection at 1 m span

Dynamic Load Rating

Handles 300–1,500 N under vibration or oscillation environments continuously

Compatibility Tolerance

±0.15 mm OD tolerance to fit standard EMT connectors and brackets

Machining Precision Grade

±0.2 mm standard; ±0.1 mm achievable for tight fit components

Fatigue Life (Slot Edge)

Steel >100,000 cycles; aluminum >50,000 cycles under cyclic stress near slots

Thermal Expansion (ΔL @ ΔT=50°C)

Steel ~0.3 mm/m; aluminum ~1.1 mm/m with 50°C temperature change

Slot Pull-Out Resistance

1,000–2,000 N before connector disengages from slotted section

Max Load Bearing at Corner Joint

Handles up to 2,000 N with reinforced brackets at corner joints

Technical Advantages

Steel EMT offers exceptional strength and resistance to mechanical stress, ideal for areas exposed to vibration and physical impact. Aluminum EMT is lightweight yet strong, providing sufficient mechanical protection for less demanding environments, where weight considerations are key.

Both extruded steel and aluminum EMT meet NEC and UL standards, ensuring electrical installations are safe and compliant. Steel EMT is particularly fire-resistant, offering additional protection in high-temperature environments, while aluminum EMT excels in environments where corrosion resistance is prioritized.

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Industry Applications

Commercial Buildings:

Used for electrical systems in offices and retail spaces, offering protection against mechanical stress and corrosion in controlled environments.

Underground Installations

Steel EMT is used for wiring protection in underground systems, offering durability against soil pressure and moisture intrusion.

Outdoor Environments

Aluminum EMT is ideal for exposed electrical systems, providing corrosion resistance in weather-exposed applications like street lighting or utility poles.

Aerospace Applications

EMT conduit is used in aircraft wiring systems, ensuring protection against vibration, high temperatures, and electromagnetic interference.

Marine Environments

Aluminum EMT resists corrosion from saltwater, providing reliable protection for electrical wiring in ships, offshore platforms, and docks.

Data Centers

EMT conduit secures wiring in high-density environments, providing fire-resistant protection and shielding cables from physical and electrical interference.

Flexibility for Complex Installations

EMT conduit’s precise extrusion allows for easy modification and bending, making it suitable for both simple and complex electrical layouts. Steel EMT is preferred for heavy-duty protection, while aluminum EMT is ideal for installations requiring flexibility and ease of handling, such as retrofits or intricate routing.

Steel EMT is galvanized to resist corrosion, making it suitable for damp or underground applications. Aluminum EMT naturally resists corrosion, making it a preferred option for coastal or marine environments. Both options provide reliable protection in harsh conditions, ensuring long-term durability.

Having Doubts? Our FAQ

Check all our Frequently Asked Question

How does Frigate ensure ovality tolerance in extruded aluminum EMT conduits?

Frigate works with extrusion partners who use precision dies and automatic diameter control systems to maintain ovality within ±0.005 inches. This ensures consistent roundness, critical for secure fitting with compression or set-screw connectors. All batches undergo inline laser scanning for quality assurance.

What measures does Frigate take to control internal seam weld flash in steel EMT conduits?

Frigate sources welded steel EMT from mills that deploy high-frequency induction welding (HFIW) with post-weld scarfing. This removes excess weld flash and maintains a smooth internal bore for frictionless cable pulling. The weld zone is also normalized to restore metallurgical consistency.

How does Frigate address galvanic corrosion between aluminum EMT and steel hardware in mixed installations?

Frigate recommends isolating dissimilar metals with non-conductive bushings or dielectric fittings in corrosive zones. This prevents electrochemical reactions that degrade conduit life. Material compatibility data is included in every technical data sheet for installer reference.

Does Frigate provide EMT conduit with custom lengths or specific bend radii for automation projects?

Yes, Frigate supplies pre-cut EMT and custom-bent sections based on project CAD files. CNC mandrel benders are used to achieve exact radii without deforming the conduit’s cross-section. This saves on-site bending time and ensures conduit integrity for high-speed automation setups.

How does Frigate ensure mechanical performance of aluminum EMT in seismic zone installations?

Frigate sources aluminum EMT that complies with ANSI C80.3 and undergoes additional crush and deflection tests per NEBS seismic standards. Special support spacing guides are provided for zone 3 and 4 compliance. This ensures conduit resilience during lateral loads and tremors.

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EMT Electrical Conduit (Extruded Steel/Aluminum)

Materialien

Surface Finishes

Compliance Standards

Cross-Section Area (A)

Mass per Meter (m)

Product Description

Moment of Inertia (Ix / Iy)

Section Modulus (Zx / Zy)

Radius of Gyration (ix / iy)

Max. Axial Load (Euler Buckling)

Max. Load at Slot (Shear Test)

Torsional Constant (J)

Max Torque (Torsional Load Limit)

Elastic Deflection (100 N Load)

Dynamic Load Rating

Compatibility Tolerance

Machining Precision Grade

Fatigue Life (Slot Edge)

Thermal Expansion (ΔL @ ΔT=50°C)

Slot Pull-Out Resistance

Max Load Bearing at Corner Joint

Technical Advantages

Let's Get Started

Industry Applications

Flexibility for Complex Installations

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EMT Electrical Conduit (Extruded Steel/Aluminum)

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EMT Electrical Conduit (Extruded Steel/Aluminum)

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