Other conduit types

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johnbowens
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125243
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Other conduit types
Updated:
2011-12-28 16:59:13
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conduit types PVC coated steel IBEW NJATC
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ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types
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  1. Rigid steel conduit may also be manufactured from______? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 115
    Stainless steel, brass, and silicon bronze.
  2. Standard clamping, cutting, and threading tools can or cannot be used with PVC coating? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 115
    Cannot.
  3. What may be used with aluminum conduit to prevent seizing and galling? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 116
    Thread/joint lubricants.
  4. What are the advantages of using aluminum conduit? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 116
    It provides an excellent ground path and it can be used with virtually no springback. It is also lightweight.
  5. What type of conduit would be preferred when installed above a finished ceiling? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 116
    Aluminum conduit.
  6. What are two disadvantages to aluminum conduit? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 116
    Aluminum conduit is subject to physical damage and does not shield wiring from outside electro-magnetic interferences well as still conduit.
  7. Aluminum Colors or what? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 116
    Same cap colors as rigid conduit. Red = 1/4, Black = 1/2, Blue = whole.
  8. Stainless steel conduit is corrosion resistant, but extremely hard and very difficult to bend, cut, and thread. True or false? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 116
    True.
  9. Bronze conduit has more or less springback? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 116
    More. With brass conduit, it is not unusual to have to bend 105° to end up with a 90° bend.
  10. What type of conduit is usually installed in a corrosive industrial environment? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 117
    PVC coated conduit.
  11. PVC coated conduit is commonly called what? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 117
    Robroy, after Robroy Industires, a manufacturer of PVC- coated conduit.
  12. PVC coating On the outside of the conduit is how thick? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 117
    40 mils thick. (.040)
  13. Re: PVC conduit What must be done after the threads are cut? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 117
    After the threads are cut they must be thoroughly degreased, cleaned, and dried, and then a touch up compound must be applied to the threads.
  14. Patching material may be supplied with what? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 117
    The original conduit order.
  15. Clamping tools, such as pipe vices and wrenches, must not have what that can damage the PVC coating? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 118
    Teeth.
  16. A common modification to clamping tools with PVC coated conduit is to replace the jaws of a pipe vice with a? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 118
    • Three sided adapter that spreads the clamping force over a larger area.
  17. Explain how to make a half-shell clamp, to protect PVC coated ridgig conduit in a vice. ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 118.

    To halves should not do what with one another when clamped on the PVC coated conduit? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP118
    Two sections of rigid conduit are used, each about 6 inches long in the next larger trade size.

    • Touch each other.
  18. Can PVC coated conduit be cut with any conventional cutting tools? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 118
    Yes, however; as with any conduit the ends must be reamed before use.
  19. Can PVC coated conduit be threaded with standard threading tools? What must be done before threading PVC coated conduit? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 118
    • Yes. However the PVC coating on the end must be pencil cut (bevilcut) for threading.
  20. What does pencil cutting PVC coated conduit before threading prevent? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 118
    • This will prevent long strips of the PVC coating from fouling that die.
  21. What must be used to determine the length of the threads before threading PVC coated conduit? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 118
    A thread protector cap.
  22. Can PVC coated conduit be bent with standard bending shoes? Why or why not? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 119
    No. Because of the PVC coating, the outside diameter is slightly larger than the standard outside diameter.
  23. For hand bending of PVC coated conduit some manufactures recommend what? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 119
    Using the next larger size bender.
  24. What is present on couplings in fittings for PVC coated conduit? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 119
    Sleeves.
  25. Regarding PVC coated conduit, it is much easier to place the sleeve over PVC coated conduit couplings and fittings when what has been done? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 119
    When it has been warmed before installation as in immersing them in warm water until they're soft and pliable.
  26. Slip joint pliers or standard pliers should or should not be used to install PVC coated connectors or fittings? What about threadless fittings? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 120
    No. Threadless fittings must not be used with PVC coated conduit.
  27. PVC thickness schedule 20, 40, & 80 should be used under what conditions?ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 120
    • Schedule 20 in underground installations when encased in concrete.
    • Schedule 40 standard wall thickness used both above and below ground.
    • Schedule 80 under heavy traffic areas such as road streets and parking lots.
  28. If PVC warm weather solvent cement is used in cold-weather what will happen? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 120
    The solvent will not dry properly and may attack the conductor insulation.
  29. Are glycol heaters still available for manufactures? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 122
    Glycol heaters have not been available from manufacturers for some time.
  30. The key to using a hot box is what on PVC conduit? ATP, Conduit Bending and Fabrication, 2007: Chapter 7 Other Conduit Types, PP 122
    To keep the conduit turning in the enclosure. If the pipe is not rotated, the side toward the heating element will overheat and blister.

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