Question

14. Components are often marked with temperature ratings. A terminal that is marked for 75°C should have a conductor with an insulation rating of at least _ 60°C 75°C 90°C any of the answers provided none of the answers provided 15. A 12 AWG conductor can be used to carry a motor amp load of 25 amps at 60°C (The most accurate answer). True - because Table 310.15(B) allows it True - because the amp load does not exceed the rated ampacity of the wire False - because a 12 AWG will only carry 20 amps False - because a 12 AWG will carry 25 amps but is limited by a 20-amp breaker none of the answers provided

Answer 1

so for Q18 answer is option C is correct

i components are ofter marted with temperatur ratings. A terminal that is marked for 75° c should have a conductor with insulation ratina at least 18°c Hint: conductor insulation rating should be more than or equal to terminal temperature since 12 AWG Conductor Carry only 2014 at 60°C so given stalement is False because 12 AWG will only Cary 20 Amps For terminal xto Components are not given any temperature rating, lowest rating is preferred So answer 60°c 12) I Given B, C,D Conductors lowest temperature rating is for B-type conductor and its temperature is 90°c so answer is 90°c 18) Insulation is measured at highest temperature of terminals So 75°C. Ampicity measured at lowest temperature ( because resistance is low at low temperature]