Electrician Red Seal · Question
An electrician is tasked with installing a new 100 A service for a small commercial building. The service entrance conduit passes through a poured concrete slab on grade. According to the CEC, what is the minimum cover required for the underground service conductors if they are installed in rigid metallic conduit (RMC)?
Table 53 in the CEC specifies the minimum depth of cover for underground conductors. For rigid metallic conduit (RMC) passing under a building or non-vehicle ar
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Question: An electrician is tasked with installing a new 100 A service for a small commercial building. The service entrance conduit passes through a poured concrete slab on grade. According to the CEC, what is the minimum cover required for the underground service conductors if they are installed in rigid metallic conduit (RMC)?
Answer options: ✅ 300 mm (12 inches)
- 450 mm (18 inches)
- 600 mm (24 inches)
- 750 mm (30 inches)
Correct answer: 300 mm (12 inches)
Explanation: Table 53 in the CEC specifies the minimum depth of cover for underground conductors. For rigid metallic conduit (RMC) passing under a building or non-vehicle areas, the minimum cover is 300 mm (12 inches).
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