Equivalent of four 90 degree bends, including the bends located at an outlet or fitting.
According to the Canadian Electrical Code (CSA C22.1), specifically Rule 12-940 (Maximum number of bends in raceways), when it is intended that insulated conductors are to be drawn into a raceway (conduit or tubing, often referred to as "cable tube" in some translations or contexts):
A run of raceway between outlets or drawn-in points shall not have more than the equivalent of four 90 degree bends, including the bends located at an outlet or fitting.
This rule ensures that pulling conductors is feasible without excessive friction, damage to insulation, or risk of kinking. The "equivalent of four 90° bends" means a total of 360° of bends (e.g., four 90° elbows, or combinations like two 90° + four 45° that sum to ≤360°). If exceeded, additional pull boxes, junction boxes, or drawn-in points are required.
The question specifies "cable tube segment" (likely conduit/tubing), "including bends at the outlet or fitting," and "insulated conductor is intended to be introduced" (drawn in), which directly matches Rule 12-940's wording and intent.
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