Emt Electrical Metallic Tubing Conduit

 

Material	Properties	Common Applications
Galvanized Steel	Strong, durable, moderate corrosion resistance	Indoor/damp, residential/commercial
Aluminum	Lightweight, high corrosion resistance	Niche use (e.g., coastal, industrial)

 

 

Size (Trade)	Actual OD (in.)	Wall Thickness (in.)	Common Use
3/8"	~0.577	~0.042	Specialized, small-scale
1/2"	~0.706	~0.042	Residential, light commercial
3/4"	~0.922	~0.049	Commercial, larger circuits
1"	~1.163	~0.057	Heavy commercial, light industrial
1-1/4" to 4"	~1.510 to ~4.500	~0.065 to ~0.083	Industrial, large-scale

 

 

• Wiring Protection: Shields electrical conductors from physical damage, moisture, and dust.
• Routing: Provides a rigid pathway to guide wires through walls, ceilings, floors, or exposed areas.
• Grounding: As a metallic conduit.
• Ease of Installation: Lightweight and bendable with a conduit bender.
• Code Compliance: Meets NEC 358 requirements for conduit systems.
• Residential:

Used to protect wiring for lighting, outlets, or appliances.

• Commercial:

Employed in office buildings, retail spaces, or schools for power distribution, lighting, or HVAC controls.

• Light Industrial:

Applied in warehouses, workshops, or small factories.

• Specific Uses:

Concealed Installations: Embedded in walls or ceilings for hidden wiring protection.

Exposed Installations: Left visible in lofts, warehouses, or retrofits for aesthetic appeal or accessibility.

Branch Circuits: Routes power from panels to multiple endpoints.

Retrofits: Adds protection to existing wiring in renovations.

 

1. Main Body (Tube):

• Material: Low-carbon steel.
• Design: A cylindrical, hollow tube with a circular cross-section.

2. Wall Thickness:

• Material: Same steel as the body, with different thickness:

1/2" to 1": ~0.042" to 0.057".

1-1/4" to 4": ~0.065" to 0.083".

• Design: Thin-walled compared to RMC .

3. Galvanized Coating:

• Material: Zinc.
• Design: A uniform layer covering the interior and exterior surfaces.

4. Weld Seam:

• Material: Steel (same as body).
• Design: A longitudinal weld along the tube's length, created by electric resistance welding of a steel strip rolled into a tube.

5. Interior Space:

Design: A smooth, hollow interior with no obstructions, sized to match trade designations.

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