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What ampacity must all branch-circuit conductors used for wiring a ceiling outlet box be de-rated at? Select one: a. 150° C b. 60° C C. 75° C d. 90° C

What ampacity must all branch-circuit conductors used for wiring a ceiling outlet box be de-rated at? Select one: a. 150° C b. 60° C C. 75° C d. 90° C

EBK ELECTRICAL WIRING RESIDENTIAL
EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN:9781337516549
Author:Simmons
Publisher:Simmons
Chapter20: Special-purpose Outlets For Ranges, Counter-mounted Cooking Unit , And Wall-mounted Oven
Section20.2: Wall-mounted Oven Circuit And Free-standing Range
Problem 12R
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Electrical engineering
What ampacity must all branch-circuit conductors used for wiring a ceiling outlet box be de-rated at? Select one: a. 150° C b. 60° C C. 75° C d. 90° C Why do ceiling outlet boxes on which a fixture may be hung require a conductor insulation rating higher than the de-rated value of 60° C? Select one: а. because of the possibility of too many outlets on the same branch circuit b. because of the possibility of too much heat from the fixture lamp С. because of the possibility of oversized fixture drawing more current d. because of the possibility that the thermal protective device could fail
Transcribed Image Text:What ampacity must all branch-circuit conductors used for wiring a ceiling outlet box be de-rated at? Select one: a. 150° C b. 60° C C. 75° C d. 90° C Why do ceiling outlet boxes on which a fixture may be hung require a conductor insulation rating higher than the de-rated value of 60° C? Select one: а. because of the possibility of too many outlets on the same branch circuit b. because of the possibility of too much heat from the fixture lamp С. because of the possibility of oversized fixture drawing more current d. because of the possibility that the thermal protective device could fail
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