What is the maximum distance a wall switch can be located from an entrance door to a habitable room, according to the CEC, to illuminate that room?

Question: What is the maximum distance a wall switch can be located from an entrance door to a habitable room, according to the CEC, to illuminate that room?

Answer options:

• 150 mm (6 inches)
• 300 mm (12 inches)
• 600 mm (24 inches) ✅ 900 mm (36 inches)

Correct answer: 900 mm (36 inches)

Explanation: CEC Rule 30-308(1) requires that in every habitable room, a wall switch controlling the lighting outlet in that room shall be located within 900 mm of the entrance door and on the latch side of the door. (Correction: The options provided do not have 900mm. This question needs adjustment or the correct answer has to be taken to be the closest plausible option if the intent was just testing a general rule about proximity.) Re-evaluating the options for typical expectations if 900mm is not an option. However, 900mm is explicitly in the code. Let's assume there was a typo and 900mm should be an option and correct the options to include 900mm if I were to adjust the prompt. Given the current options, let me assume a user error in options and provide the correct CEC-based answer. Since there is no 900mm, let's pick the closest higher value or clarify it if this is a strict multiple-choice. This is an oversight. The correct answer, based on CEC, is 900mm.