EMT (Electrical Metallic Tubing) is a type of conduit used to protect and route electrical wiring. It is often referred to as "thin-wall" conduit because it is lighter and thinner than other types of metallic conduits. Here are the key differences between EMT and other types of conduit: 1. **Material and Construction**: - **EMT**: Made of galvanized steel or aluminum, providing a good balance of strength and weight. It is not threaded and typically connected using clamp-type fittings. - **Rigid Metal Conduit (RMC)**: Thicker and heavier than EMT, made of galvanized steel or aluminum, and is threaded for secure connections. - **Intermediate Metal Conduit (IMC)**: Thicker than EMT but thinner than RMC, offering a middle ground in terms of strength and weight. 2. **Flexibility**: - **EMT**: More flexible than RMC and IMC, allowing for easier bending and installation in tight spaces. - **Flexible Metal Conduit (FMC)**: Offers the most flexibility, used in areas requiring movement or vibration absorption. 3. **Installation**: - **EMT**: Easier and quicker to install due to its lighter weight and use of compression or set-screw fittings. - **RMC/IMC**: Requires threading and more labor-intensive installation. 4. **Cost**: - **EMT**: Generally less expensive than RMC and IMC due to its thinner walls and simpler installation process. - **RMC/IMC**: Higher cost due to material thickness and installation complexity. 5. **Applications**: - **EMT**: Suitable for indoor use and in environments where physical protection is needed but not extreme. - **RMC/IMC**: Used in harsher environments, including outdoor and industrial settings, due to their durability. 6. **Corrosion Resistance**: - **EMT**: Offers some corrosion resistance but is less robust than RMC and IMC, which are better suited for corrosive environments.

To bend EMT (Electrical Metallic Tubing) conduit, follow these steps: 1. **Tools Required**: Obtain a conduit bender suitable for the EMT size you are working with. Ensure you have a tape measure, marker, and level. 2. **Measure and Mark**: Determine the length and angle of the bend needed. Use a tape measure to mark the conduit at the point where the bend will start. Mark the direction of the bend with an arrow. 3. **Position the Conduit**: Place the conduit on the floor or a stable surface. Insert the conduit into the bender with the mark aligned to the bender's arrow or notch, which indicates the start of the bend. 4. **Foot Placement**: Stand on the bender's foot pedal to secure it. Ensure your foot is firmly placed to prevent slipping. 5. **Bend the Conduit**: Pull the handle of the bender towards you while keeping the conduit in place with your foot. Apply steady pressure to achieve a smooth bend. Use the level to check the angle as you bend, ensuring it matches your requirements. 6. **Check the Bend**: Once the desired angle is reached, remove the conduit from the bender. Use the level to verify the accuracy of the bend. Adjust if necessary by applying slight pressure in the opposite direction. 7. **Repeat if Necessary**: For multiple bends, repeat the process, ensuring each bend is accurately measured and marked. 8. **Safety Precautions**: Always wear safety glasses and gloves to protect against metal shards and sharp edges. By following these steps, you can effectively bend EMT conduit to fit your electrical installation needs.

Yes, EMT (Electrical Metallic Tubing) conduit can be used outdoors, but certain conditions must be met to ensure its suitability and longevity. EMT is a type of metal conduit that is lightweight and easy to install, making it a popular choice for electrical installations. However, when used outdoors, it must be protected against environmental factors such as moisture, corrosion, and physical damage. 1. **Corrosion Protection**: EMT is typically made of galvanized steel, which provides some level of corrosion resistance. For outdoor use, it is crucial to ensure that the EMT is properly coated or treated to withstand exposure to moisture and other corrosive elements. In areas with high humidity or salt exposure, additional protective coatings or the use of stainless steel EMT may be necessary. 2. **Weatherproof Fittings**: When installing EMT outdoors, it is essential to use weatherproof fittings and connectors. These components help maintain the integrity of the conduit system by preventing water ingress and ensuring a secure connection between conduit sections. 3. **Support and Protection**: EMT must be adequately supported and protected from physical damage. This includes securing the conduit to structures at regular intervals and using protective covers or barriers in areas where the conduit may be exposed to impact or abrasion. 4. **Compliance with Codes**: All outdoor installations of EMT must comply with the National Electrical Code (NEC) or local electrical codes, which provide guidelines on the proper use and installation of electrical conduits in various environments. By taking these precautions, EMT conduit can be effectively used outdoors, providing a reliable and durable solution for electrical wiring in exterior applications.

To cut EMT (Electrical Metallic Tubing) conduit, you will need the following tools: 1. **Tubing Cutter**: A specialized tool designed for cutting metal pipes and conduits. It provides a clean, straight cut and is easy to use, especially for smaller diameter conduits. 2. **Hacksaw**: A versatile tool that can cut through metal. It requires more effort and precision than a tubing cutter but is effective for larger diameters or when a tubing cutter is not available. 3. **Reciprocating Saw**: Useful for cutting through EMT quickly, especially in tight spaces or when dealing with multiple cuts. It requires a metal-cutting blade. 4. **Angle Grinder**: Equipped with a metal-cutting disc, it can make quick work of cutting EMT. It is best for larger projects but requires careful handling to ensure safety and precision. 5. **Pipe Reamer or Deburring Tool**: After cutting, the inside of the conduit may have sharp edges or burrs. A reamer or deburring tool smooths these edges to prevent damage to wires and ensure safe handling. 6. **Measuring Tape**: Essential for measuring the length of conduit needed before cutting to ensure accuracy. 7. **Marker or Pencil**: Used to mark the cutting line on the conduit for precision. 8. **Vise or Clamp**: To hold the conduit securely in place while cutting, ensuring a straight and safe cut. These tools collectively ensure that EMT conduit is cut accurately, safely, and efficiently, ready for installation in electrical systems.

To install EMT (Electrical Metallic Tubing) conduit, follow these steps: 1. **Plan the Layout**: Determine the path for the conduit, considering the location of electrical boxes and the route to minimize bends. 2. **Measure and Cut**: Measure the required length of conduit. Use a hacksaw or a conduit cutter to cut the EMT to size. Deburr the cut ends with a reamer or file to remove sharp edges. 3. **Bend the Conduit**: If bends are necessary, use a conduit bender. Align the conduit in the bender, ensuring the correct angle and direction. Apply steady pressure to achieve the desired bend. 4. **Install Conduit Supports**: Secure the conduit with straps or hangers at intervals specified by the National Electrical Code (NEC), typically every 10 feet and within 3 feet of each box or fitting. 5. **Connect Conduit Sections**: Use couplings to join sections of conduit. Slide the conduit into the coupling and tighten the screws to secure. Ensure connections are tight to maintain electrical continuity. 6. **Attach to Boxes**: Insert the conduit into the knockout holes of electrical boxes. Use connectors to secure the conduit to the box, tightening the locknut inside the box. 7. **Pull Wires**: Once the conduit is installed, use fish tape to pull wires through the conduit. Ensure wires are rated for the application and do not exceed fill capacity. 8. **Inspect and Test**: Check all connections and ensure the conduit is securely fastened. Test the electrical system for continuity and proper operation. 9. **Compliance**: Ensure the installation complies with local codes and regulations, including grounding and bonding requirements. 10. **Final Checks**: Perform a final inspection to ensure all components are secure and the system is safe for use.