Electrician Red Seal · Question
A technician is installing a new 480 V, 3-phase, 20 A circuit to a motor. The conduit run includes four 90-degree bends and extends 30 metres (98 feet). Which of the following wiring methods is typically NOT permitted for this installation, according to CEC Rule 12-1002, given the conduit run length and bends?
CEC Rule 12-1002 limits the use of Flexible Metallic Conduit (FMC) to lengths not exceeding 1.5 m (5 ft), except for certain specific applications. A 30 m run w
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Question: A technician is installing a new 480 V, 3-phase, 20 A circuit to a motor. The conduit run includes four 90-degree bends and extends 30 metres (98 feet). Which of the following wiring methods is typically NOT permitted for this installation, according to CEC Rule 12-1002, given the conduit run length and bends?
Answer options:
- Electrical Metallic Tubing (EMT)
- Rigid Metal Conduit (RMC)
- Rigid Non-metallic Conduit (RNMC) ✅ Flexible Metallic Conduit (FMC)
Correct answer: Flexible Metallic Conduit (FMC)
Explanation: CEC Rule 12-1002 limits the use of Flexible Metallic Conduit (FMC) to lengths not exceeding 1.5 m (5 ft), except for certain specific applications. A 30 m run with four 90-degree bends would far exceed this limitation, making it unsuitable for a primary wiring method over such a distance.
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