Updated NEC for NCCER Electrical 1, Conductors and Cables
Updated: NEC for NCCER Electrical 1, Conductors and Cables
Study online at https://quizlet.com/_jbxo7b
1. NEC Chapter 9 Conductor Stranding
Table 8 18-2 AWG = 7 strands; 1-4/0 AWG = 19 strands; 250-500 kcmil = 37 strands
2. Table 310.16 Ampacity of insulated conductors in raceway, cable, or directly buried at 30°C
(NEC) (86°F), up to 3 current-carrying conductors before adjustment
3. Table 310.17 Ampacity of insulated conductors in free air or open wiring; higher ampacity due
(NEC) to better cooling than raceways
4. Table 310.18 Ampacity based on insulation temperature ratings (60°C, 75°C, 90°C) for conduc-
(NEC) tors in raceways or cables
can't exceed the lowest temperature rating in the system
5. Table 310.19 Ampacity of single insulated conductors in free air with improved cooling condi-
(NEC) tions
6. Table 310.20 Ampacity of conductors supported by a messenger in free air; includes installation
(NEC) and temperature limitations
7. Table 310.21 Ampacity of bare or covered conductors in free air under maximum cooling con-
(NEC) ditions
8. Table 310.4(1) Table of conductor properties including insulation type, voltage rating, tempera-
(NEC) ture rating, and general use
9. NEC 210.5(C)(2) DC branch circuits must be identified where multiple systems exist; ungrounded
conductors may be any color except white, gray, or green
10. NEC 110.15 High-leg (B phase) must be permanently marked orange at all termination points
where grounded conductors are present
11. NEC 310.15(B)(1) Ampacity correction required when ambient temperature exceeds 30°C (86°F)
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Updated: NEC for NCCER Electrical 1, Conductors and Cables
Study online at https://quizlet.com/_jbxo7b
1. NEC Chapter 9 Conductor Stranding
Table 8 18-2 AWG = 7 strands; 1-4/0 AWG = 19 strands; 250-500 kcmil = 37 strands
2. Table 310.16 Ampacity of insulated conductors in raceway, cable, or directly buried at 30°C
(NEC) (86°F), up to 3 current-carrying conductors before adjustment
3. Table 310.17 Ampacity of insulated conductors in free air or open wiring; higher ampacity due
(NEC) to better cooling than raceways
4. Table 310.18 Ampacity based on insulation temperature ratings (60°C, 75°C, 90°C) for conduc-
(NEC) tors in raceways or cables
can't exceed the lowest temperature rating in the system
5. Table 310.19 Ampacity of single insulated conductors in free air with improved cooling condi-
(NEC) tions
6. Table 310.20 Ampacity of conductors supported by a messenger in free air; includes installation
(NEC) and temperature limitations
7. Table 310.21 Ampacity of bare or covered conductors in free air under maximum cooling con-
(NEC) ditions
8. Table 310.4(1) Table of conductor properties including insulation type, voltage rating, tempera-
(NEC) ture rating, and general use
9. NEC 210.5(C)(2) DC branch circuits must be identified where multiple systems exist; ungrounded
conductors may be any color except white, gray, or green
10. NEC 110.15 High-leg (B phase) must be permanently marked orange at all termination points
where grounded conductors are present
11. NEC 310.15(B)(1) Ampacity correction required when ambient temperature exceeds 30°C (86°F)
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