This course teaches the history of conduit, its purpose, and the rules set forth by the National Electrical Code that governs safe installation practices for all types of conduit.
This course teaches proper techniques for bending electrical metallic tubing and gives the learner a challenging set of parameters to follow to complete their weekly tasks including stub 90’s, offsets, kicks, and saddles.
Following the techniques as instructed can translate to bending pneumatic and hydraulic tubing, as well as galvanized rigid conduit and IMC. The learner will also be introduced to cutting and threading intermediate metallic conduit, galvanized rigid conduit, and pipe. Instructions will also be given for working with rigid nonmetallic conduit, flexible conduit, and conduit bodies, and the proper method for supports.
The learner will take measurements of an electrical practice board that will be using in class for practice, and for learners to demonstrate competencies working with electrical metallic tubing. Learners will use the measurements to create a board that will serve to assist them in practicing what they have learned in order to hone their skills. The final Skills-based assessment for this class is worth 50% of the grade and includes bending a box offset, a 90 degree bend, a 3 bend saddle, another 90 degree bend, and an offset.
Prerequisites
None.
History and purpose for using conduit
1. Identify the need for conduit, and the factors that determine the type of conduit used for each purpose.
2. Identify and explain the importance of personal protective equipment.
3. Demonstrate the proper use of personal protective equipment associated with conduit installation.
4. Demonstrate proper use of specialized equipment for bending conduit.
Proper Techniques
1. Explain the identifying markings on a hand bender.
2. Describe what all of the markings mean, and what they are used for.
3. Demonstrate the proper use of electrical metallic tubing bender.
4. Review tape measures reading comprehension for accuracy.
5. Identify the differences between shrink and gain, and where each of them takes place in conduit bending.
6. Describe spring back, when it occurs, and how to calculate and compensate for it.
7. Demonstrate competence calculating total bend amount and explain why it is important.
Pneumatic and Hydraulic tubing similarities
1. Explain the similarity between conduit bending and small bore tubing bending.
2. Demonstrate tubing bending similarities by bending a short example using a rubric.
3. Describe the effect of viscosity of fluids.
Cutting and Threading Conduit
1. Explain the importance of safety when working around rotating equipment.
2. Demonstrate the proper use of personal protective equipment when cutting and threading.
3. Describe the hazards of loose apparel when working with rotating equipment.
4. Demonstrate competence using a tape measure to create a six-inch-long threaded rigid nipple with a standardized length of threads on each end.
5. Explain the importance of reaming the conduit, and what may occur if it is not reamed properly.
Alternate conduit types and installation practices
1. Define conduit bodies and describe when they should be used.
2. Demonstrate knowledge of different conduit, its purpose, and where it should be used.
3. Describe the drawbacks of using the wrong conduit for a given situation.
4. Define support methods for conduit runs that are supported from the ceiling, walls, floor, and underground whether encased in concrete of direct burial.
5. Define support methods for type AC, MC, flex, sealtite, and similar types of cable.