In Article " Types of Electrical Conduits ", I explained the following points:
- Definition of An electrical conduit,
- Advantages of using Electrical conduits than other wiring methods,
- Disadvantages of using Electrical conduits,
- How to Verify Correct Installation of Conduit,
- Types of Conduit.
Today, I will explain Conduit Fittings and Supports as follows.
Conduit Fittings and Supports
Types of Conduit Fittings and Supports There are many types of conduit fittings, made in different sizes and shapes. The type of conduit fitting used will depend upon the particular need. These conduit fittings can be listed as follows:
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1- Conduit Bodies And Covers
Figure 1. Conduit Bodies And Covers |
2- Conduit Bends
Figure 2. Factory Bends (Elbows) |
3- Conduit Coupling When two lengths of conduit connect, a coupling joins them. Figure 3 shows a rigid conduit coupling. The coupling is threaded on the inside and made in different sizes. Figure 3. A Rigid Conduit Coupling |
4- Conduit Bushing A locknut fitting (Figure 4) screws onto conduit connecting it to an enclosure. A bushing (Figure 4) provides protection for conductors leaving the conduit opening. Figure 4. A Locknut and a Bushing Figure 5 shows the application of both the locknut and the bushing. Two locknuts connect a piece of conduit to a punched enclosure. The locknuts are tightened on both sides to secure the conduit. The bushing screws on to the end of the conduit and protects the wires from damage as they are pulled through the conduit. Figure 5. The Application of a Locknut and a Bushing |
5- Conduit Union The conduit union (Figure 6) connects two sections of rigid conduit when neither section can physically turn. The union is a conduit coupling used for emergency repair work and in difficult places near corners, walls, or ceilings. The two types shown are a union with two female hubs (UNF) and a union with a male and female hub (UNY). Figure 6. Two Types of Rigid Conduit Union |
6- Reducing washers Reducing washers connect smaller diameter conduit to larger boxes and enclosure holes. Threaded reducers connect smaller conduit to larger conduit fittings. Figure 7 shows how a threaded reducer and a reducing washer work. Figure 7. Reducing Fittings |
7- Conduit nipples
Figure 8. Conduit Nipple |
8- Conduit straps Conduit straps mount against the conduit to fasten it in place (Figure 9). Straps fasten to the wall or ceiling with screws or bolts. Straps are support fitting. Figure 9. Conduit Straps |
9- Conduit clamps Conduit clamps are used to fasten conduit to fixed structures. They are considered support fittings. See Figure 10. Figure 10. Conduit Clamps |
Notes for Conduit Supporting
Figure 11. Rigid Conduit Minimum Support Requirements
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In the next Article, I will explain How to Verify Correct Installation of Junction Boxes. Please, keep following.
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