When installing conductors for hoistway door interlock wiring, the conductors shall be ___________________.
A) flame retardant and suitable for a temperature of not less than 200°C (392°F) and type SF or equivalent B) physically protected using an approved method such that the conductor assembly is flame retardant and suitable for a temperature of not less than 200°C (392°F) C) either A or B above D) any 90°C rated conductor
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Answer: C
As outlined in Sec. 620.11(A), when installing conductors for hoistway door interlock wiring, the conductors shall be flame retardant and suitable for a temperature of not less than 200°C (392°F) and type SF or equivalent, or physically protected using an approved method such that the conductor assembly is flame retardant and suitable for a temperature of not less than 200°C (392°F).
Owen is the owner and president of National Code Seminars and the holder of master electrician certifications in 46 states. He can be reached at [email protected].