Question 10020 of 790 · California General Electrician Exam
Unless listed for a lesser depth, the top of the lens of a wet-niche luminaire must be at least how far below the normal water level?
Exactly one answer is correct.
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Correct answer to question 10020
- D: 18 in
Explanation
Luminaires mounted in pool walls must have the top of the lens at least 18 in below the normal water level unless the luminaire is listed and identified for use at a lesser depth, which may not be less than 4 in. Keeping the lens well below the surface reduces the chance of contact with an energized luminaire.
More questions: Special Equipment, Pools, PV and EV
- 10021A branch circuit supplies an underwater pool luminaire operating above the low-voltage contact limit. What protection is required?
- 10022For sinusoidal ac, the low-voltage contact limit used in Article 680 is how many volts RMS?
- 10025What is the minimum size of a solid copper equipotential bonding conductor for a permanently installed pool?
- 10027Perimeter surfaces around a pool must be bonded for what minimum horizontal distance beyond the inside walls?
- 10030For conductive pool shells, perimeter surface bonding must attach to the structural reinforcing steel or copper grid at a minimum of how many points?
- 10031Pool water must be bonded by a conductive surface in contact with the water of at least what area?