Question

6.9 Ambient Temperature Correction 1. A 2 TW conductor is installed in a location where the ambient temperature is expected to be 102°F. The temperature correction factor for conductor ampacity in this location is ___. (a) 0.71 (b) 0.82 (c) 0.88 (d) 0.96 2. If the ambient temperature is 71°C, the minimum insulation temperature rating that a conductor must have and still have the capacity to carry current is _. (a) 60°C (b) 90°C (c) 105°C (d) 120°C 6.11 Ampacity Adjustment [310.15(B)(3)(a)] 3. The ampacity of six current-carrying 4/0 XHHW aluminum conductors installed in a ground floor slab (wet location) is _. (a) 135A (b) 144A (c) 185A (d) 210A 4. The ampacity of 15 current-carrying 10 RHW aluminum conductors in a raceway in an ambient temperature of 75°F is _. (a) 12A (b) 15A (c) 22A (d) 30A 5. A(n) _ THHN conductor is required for a 19.70A noncontinuous load if the ambient temperature is 75°F and there are nine current-carrying conductors in the raceway in a dry location. (a) 14 (b) 12 (c) 10 (d) 8 6. The ampacity for each of nine current-carrying 10 THW conductors installed in a 20 in. long raceway is ___. (a) 25A (b) 30A (c) 35A (d) 40A

          6.9 Ambient Temperature Correction
1. A 2 TW conductor is installed in a location where the ambient temperature is expected to be 102°F. The temperature correction factor for conductor ampacity in this location is _____.
(a) 0.71
(b) 0.82
(c) 0.88
(d) 0.96
2. If the ambient temperature is 71°C, the minimum insulation temperature rating that a conductor must have and still have the capacity to carry current is _____.
(a) 60°C
(b) 90°C
(c) 105°C
(d) 120°C
6.11 Ampacity Adjustment [310.15(B)(3)(a)]
3. The ampacity of six current-carrying 4/0 XHHW aluminum conductors installed in a ground floor slab (wet location) is _____.
(a) 135A
(b) 144A
(c) 185A
(d) 210A
4. The ampacity of 15 current-carrying 10 RHW aluminum conductors in a raceway in an ambient temperature of 75°F is _____.
(a) 12A
(b) 15A
(c) 22A
(d) 30A
5. A(n) _____ THHN conductor is required for a 19.70A noncontinuous load if the ambient temperature is 75°F and there are nine current-carrying conductors in the raceway in a dry location.
(a) 14
(b) 12
(c) 10
(d) 8
6. The ampacity for each of nine current-carrying 10 THW conductors installed in a 20 in. long raceway is _____.
(a) 25A
(b) 30A
(c) 35A
(d) 40A

6.9 Ambient Temperature Correction
1. A 2 TW conductor is installed in a location where the ambient temperature is expected to be 102°F. The temperature correction factor for conductor ampacity in this location is .
(a) 0.71
(b) 0.82
(c) 0.88
(d) 0.96
2. If the ambient temperature is 71°C, the minimum insulation temperature rating that a conductor must have and still have the capacity to carry current is .
(a) 60°C
(b) 90°C
(c) 105°C
(d) 120°C
6.11 Ampacity Adjustment [310.15(B)(3)(a)]
3. The ampacity of six current-carrying 4/0 XHHW aluminum conductors installed in a ground floor slab (wet location) is .
(a) 135A
(b) 144A
(c) 185A
(d) 210A
4. The ampacity of 15 current-carrying 10 RHW aluminum conductors in a raceway in an ambient temperature of 75°F is .
(a) 12A
(b) 15A
(c) 22A
(d) 30A
5. A(n) THHN conductor is required for a 19.70A noncontinuous load if the ambient temperature is 75°F and there are nine current-carrying conductors in the raceway in a dry location.
(a) 14
(b) 12
(c) 10
(d) 8
6. The ampacity for each of nine current-carrying 10 THW conductors installed in a 20 in. long raceway is .
(a) 25A
(b) 30A
(c) 35A
(d) 40A

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