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1. |
330.104 Conductors (in Type MC cable)
This section been modified to incorporate nickel and nickel coated copper conductors that are used in fire rated cables.
Conductors shall be made of copper, aluminum, copper-clad aluminum, nickel, or nickel-coated copper, solid or stranded.
Question: Conductors in Type MC cable can be made of ______________________________________ .
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a)
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nickel-coated copper
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b)
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nickel
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c)
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copper-clad aluminum
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d)
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copper or aluminum
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e)
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a, b, c, or d
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2. |
334.12(A)(1) Exception
For Type I and Type II fire rated construction NM cable is permitted to be installed in raceways that are allowed in this type of construction.
Type NM, NMC, NMS cable shall be permitted in raceways in Type I and Type II construction provided the raceways are permitted for this type of construction.
Question: _____________ is permitted in raceways in Type I and Type II fire-rated construction if the raceway is permitted.
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a)
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Nonmetallic sheathed cable
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b)
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Type NMS cable
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c)
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Type NMC cable
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d)
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Type NMS
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e)
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All of the above
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3. |
334.12(B)(4) Uses Not Permitted
Type NM and NMS cable shall not be used "where subject or subject to excessive moisture or dampness" has been changed to Type NM and NMS cable shall not be used in damp or wet locations.
This adds a more severe test and raises the question on whether or not NM cable can be used in crawl spaces. The AHJ will have to make that determination. Crawl spaces may be damp locations.
Question: Type NM and NMS cable shall not ________________ .
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a)
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be used in damp or wet locations.
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b)
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be directly buried
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c)
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be used in in raceways located out of doors
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d)
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be used in in raceways that are buried in earth
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e)
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a, b, c, and d
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4. |
334.15(B) Protection from Physical
Damage
The requirement to protect NMC cable has been extended to chases and
grooves in masonry, concrete, or adobe. Type NMC cable installed in
shallow chases or grooves in masonry, concrete, or adobe, shall be protected in
accordance with the requirements in 300.4(F) and covered with plaster, adobe, or
similar finish.Question:
Type NMC cable installed in shallow chases or grooves in masonry, concrete, or
adobe ________________________ in accordance with the requirements in 300.4(F) . |
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a)
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shall be in raceway
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b)
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shall be protected
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c)
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shall be covered with steel plate
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5. |
334.80 Ampacity
Where more than two NM cables are in contact with thermal insulation, fire stopping caulking, or foam where spacing is not maintained derating shall be applied.
Where more than two NM cables containing two or more current carrying conductors are installed, without maintaining spacing between the cables, through the same opening in wooden framing members that is to be fire-stopped using thermal insulation, caulking material, or sealing foam, the allowable ampacity of each conductor shall be adjusted in accordance with Table 310.15(B)(2) and the provisions of 310.15(A)(2). Exception shall not apply.
Question: Where more than two NM cables containing two or more current carrying conductors are installed, without maintaining spacing between the cables, through the same opening in wooden framing members that is to be fire-stopped using thermal insulation, caulking material, or sealing foam, the allowable ampacity of each conductor ______________.
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a)
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shall be 80 per cent of table values
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b)
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shall be derated
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c)
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shall be adjusted
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6. |
336.10(7) Exception. Type TC cable shall be permitted to be used as follows with the following exception.
Where not subject to physical damage, Type TC-ER shall be permitted to transition between cable trays and utilization equipment or devices for a distance not to exceed 6 feet without continuous support. the cable shall be mechanically supported where exiting the cable tray to ensure that he minimum bending radius is not exceeded.
Question: Where not subject to physical damage, Type TC-ER shall be permitted to transition between cable trays and utilization equipment or devices for a distance _______________without continuous support.
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a)
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not to exceed 6 feet
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b)
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not to exceed 3 feet
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c)
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not to exceed 12 inches
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7. |
338.12(A) Uses Not Permitted
Service Entrance Cable Not Permitted to be used under the following conditions:
1. Where subject to physical damage unless protected in accordance with 230.50(A)3. For exterior branch circuits and feeder wiring unless the installation complies with the provision of part I of Article 225 and is supported in accordance with 334.30 or is used as a messenger supported wiring method as permitted in Part II of Article 396
Question: Type SE cable is not permitted to be used _______________________________ .
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a)
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Underground with or without a raceway
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b)
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Above ground with or without a raceway
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c)
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For interior wiring
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8. |
338.12(B) Uses Not Permitted
New section makes it clear where USE cable cannot be used.
Underground Service Entrance Cable (USE) shall not be used under the following conditions:
1. For interior wiring
2. For above ground installations except where USE cable emerges from the ground and is terminated in an enclosure at an outdoor location and the cable is protected in accordance with 300.5(D).
3. As aerial cable unless it is a multi conductor cable identified for use above ground and installed as messenger supported wiring in accordance with 225.10 and part II of Article 396.
Question: Underground Service Entrance Cable (USE) shall not be used for __________________________ .
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a)
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For interior wiring
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b)
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For above ground installations except where USE cable emerges from the ground and is terminated in an enclosure at an outdoor location and the cable is protected in accordance with 300.5(D).
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c)
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a and b
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9. |
338.10(B)(4)(a) Uses Permitted
Type SE cable used for interior wiring shall comply with the provisions of part II of Article 334. Article 334 is for nonmetallic cable and part II contains the requirement that the ampacity of NM cable shall be based on the 60 degree C column of Table 310.16 but the 90 degree ampacity can be used for derating provided the conductors are not used at greater than the 60 degree C ampacity.Interior installations. In addition to the provisions of this Article Type SE service entrance cable used for interior wiring shall comply with the installations requirements found in Part II of Article 334.
334.80 Ampacity. The ampacity of Types NM, NMC, and NMS cable shall be determined in accordance with 310.15. The ampacity shall be in accordance with the 60°C (140°F) conductor temperature rating. The 90°C (194°F) rating shall be permitted to be used for ampacity derating purposes, provided the final derated ampacity does not exceed that for a 60°C (140°F) rated conductor. The ampacity of Types NM, NMC, and NMS cable installed in cable tray shall be determined in accordance with 392.11. Where more than two NM cables containing two or more current-carrying conductors are bundled together and pass through wood framing that is to be fire- or draft stopped using thermal insulation or sealing foam, the allowable ampacity of each conductor shall be adjusted in accordance with Table 310.1 (B)(2)(a).
Question: The _________ shall be used for determining the ampacity of conductors in Type SE cable.
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a)
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60 degree C column in Table 310.16
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b)
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90 degree C column in Table 310.16
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c)
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75 degree C column in Table 310.16
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10. |
342.30(C) unsupported Raceways
At last there is a rule addressing the controversial subject of supporting short sections of unbroken conduits and tubing installed between boxes and enclosures. 18 inches is the limit for no support. This new requirement has been added to Articles 342 for IMC, Article 344 for RMC, Article 352 for PVC, Article 355 for RTRC, and Article 358 for EMT.
Where oversized, concentric or eccentric knockouts are not encountered, Type IMC shall be permitted to be unsupported where the raceway is not more than 18 inches in length and remains in unbroken lengths (without coupling). Such raceways shall terminate in an outlet box, junction box, device box, cabinet, or other termination at each end of the raceway.
Question: Where oversized, concentric or eccentric knockouts are not encountered, Type IMC shall be permitted to be unsupported where the raceway is not more than ________in length and remains in unbroken lengths (without coupling).
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a)
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12 inches
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b)
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18 inches
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c)
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24 inches
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