EMT (Electrical Metallic Tubing) conduit refers to steel-based durable enclosures that route individual electrical wiring conductors in a building or structure. It protects the wires from impact, moisture, and chemical vapors. EMT conduit is known for its lightweight and thin-wall design. It is commonly galvanized to provide resistance to rust and corrosion.
Key Facts
- Definition: EMT conduit refers to steel-based durable enclosures that route individual electrical wiring conductors in a building or structure and protect the wires from impact, moisture, and chemical vapors.
- Characteristics: EMT conduit is known for its lightweight and thin-wall design. It is commonly galvanized to provide resistance to rust and corrosion.
- Applications: EMT conduit is versatile and suitable for various applications, including exposed and concealed installations, indoors and outdoors, wet and dry conditions, direct burial, embedding in concrete, and overhead lighting circuits. It is commonly used in commercial, industrial, and residential projects where physical damage is not expected to be significant.
- Advantages: EMT conduit offers several benefits, such as being lightweight, flexible, and easy to bend. It is widely available, and its fittings are relatively easy to install. EMT conduits are non-flammable and aesthetically attractive, making them suitable for exposed environments where appearance matters.
- Limitations: EMT conduit has some limitations. It cannot be used in areas where physical damage is likely. Additionally, raintight fittings for EMT conduit are not currently available, and it is not watertight, so it cannot be submerged in water.
- Comparison with other types of conduit:
- Aluminum vs. Steel EMT Conduit: EMT conduit is available in both aluminum and steel options. Steel EMT conduit is sturdier and more rigid compared to aluminum. Galvanized steel EMT conduit is generally cheaper than aluminum EMT conduit.
- EMT vs. Rigid Conduit: EMT conduit is thinner and easier to cut and install compared to rigid conduit. Rigid conduit provides superior protection against mechanical impact and has better corrosion resistance. Rigid conduit is more commonly used in industrial settings.
- EMT Conduit vs. PVC: PVC conduit is a plastic conduit and not made of metal. PVC conduit is not rigid and can only be bent when heated. PVC conduit is cheaper than EMT conduit but cannot serve as an equipment grounding conductor.
EMT conduit is versatile and suitable for various applications, including exposed and concealed installations, indoors and outdoors, wet and dry conditions, direct burial, embedding in concrete, and overhead lighting circuits. It is commonly used in commercial, industrial, and residential projects where physical damage is not expected to be significant.
Advantages of EMT Conduit
EMT conduit offers several benefits, such as being lightweight, flexible, and easy to bend. It is widely available, and its fittings are relatively easy to install. EMT conduits are non-flammable and aesthetically attractive, making them suitable for exposed environments where appearance matters.
Limitations of EMT Conduit
EMT conduit has some limitations. It cannot be used in areas where physical damage is likely. Additionally, raintight fittings for EMT conduit are not currently available, and it is not watertight, so it cannot be submerged in water.
Comparison with other types of conduit
Aluminum vs. Steel EMT Conduit: EMT conduit is available in both aluminum and steel options. Steel EMT conduit is sturdier and more rigid compared to aluminum. Galvanized steel EMT conduit is generally cheaper than aluminum EMT conduit.
EMT vs. Rigid Conduit: EMT conduit is thinner and easier to cut and install compared to rigid conduit. Rigid conduit provides superior protection against mechanical impact and has better corrosion resistance. Rigid conduit is more commonly used in industrial settings.
EMT Conduit vs. PVC: PVC conduit is a plastic conduit and not made of metal. PVC conduit is not rigid and can only be bent when heated. PVC conduit is cheaper than EMT conduit but cannot serve as an equipment grounding conductor.
Sources:
- https://www.nema.org/membership/products/view/steel-conduit-electrical-metallic-tubing-section
- https://nassaunationalcable.com/blogs/blog/everything-you-need-to-know-about-emt-electrical-conduit
- https://forums.mikeholt.com/threads/is-emt-a-conduit.96696/
FAQs
What is EMT conduit?
EMT (Electrical Metallic Tubing) conduit refers to steel-based durable enclosures that route individual electrical wiring conductors in a building or structure. It protects the wires from impact, moisture, and chemical vapors.
What are the characteristics of EMT conduit?
EMT conduit is lightweight, flexible, easy to bend, and widely available. It is commonly galvanized to provide resistance to rust and corrosion.
What are the applications of EMT conduit?
EMT conduit is suitable for various applications, including exposed and concealed installations, indoors and outdoors, wet and dry conditions, direct burial, embedding in concrete, and overhead lighting circuits. It is commonly used in commercial, industrial, and residential projects where physical damage is not expected to be significant.
What are the advantages of using EMT conduit?
EMT conduit offers several benefits, such as being lightweight, flexible, easy to bend, widely available, and relatively easy to install. It is also non-flammable and aesthetically attractive, making it suitable for exposed environments where appearance matters.
What are the limitations of EMT conduit?
EMT conduit cannot be used in areas where physical damage is likely. Additionally, raintight fittings for EMT conduit are not currently available, and it is not watertight, so it cannot be submerged in water.
How does EMT conduit compare to other types of conduit, such as rigid conduit and PVC conduit?
EMT conduit is thinner and easier to cut and install compared to rigid conduit. Rigid conduit provides superior protection against mechanical impact and has better corrosion resistance. EMT conduit is cheaper than rigid conduit. EMT conduit is also cheaper than PVC conduit, but PVC conduit is not as strong and cannot serve as an equipment grounding conductor.
What are some important considerations when using EMT conduit?
EMT conduit must be installed in accordance with the National Electrical Code (NEC) and all applicable local regulations. It is important to choose the right size and type of EMT conduit for the specific application. Proper installation techniques, such as securing the conduit to supports and using appropriate fittings, are also crucial to ensure the safety and effectiveness of the installation.
Where can I find more information about EMT conduit?
You can find more information about EMT conduit from various sources, including the National Electrical Manufacturers Association (NEMA), electrical supply distributors, and online resources. It is always advisable to consult with a qualified electrician or electrical contractor for specific questions or concerns related to the use of EMT conduit.