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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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