Electrician Red Seal · Question
An electrician is roughing in wiring for a new service and needs to pull three No. 3 AWG R-type (RW90) conductors through a 32 mm (1 1/4 inch) EMT conduit run approximately 15 metres (50 feet) long with three 90-degree bends. What is the maximum allowable number of 90-degree bends in a single run of conduit between pulling points, according to the CEC?
Rule 12-1110(1) states that no conduit run shall contain more than the equivalent of four 90-degree bends between pull points (e.g., box-to-box, box-to-fitting)
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Question: An electrician is roughing in wiring for a new service and needs to pull three No. 3 AWG R-type (RW90) conductors through a 32 mm (1 1/4 inch) EMT conduit run approximately 15 metres (50 feet) long with three 90-degree bends. What is the maximum allowable number of 90-degree bends in a single run of conduit between pulling points, according to the CEC?
Answer options:
- 3 bends ✅ 4 bends
- 2 bends
- 5 bends
Correct answer: 4 bends
Explanation: Rule 12-1110(1) states that no conduit run shall contain more than the equivalent of four 90-degree bends between pull points (e.g., box-to-box, box-to-fitting). This limits the difficulty of pulling conductors and potential damage to insulation.
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