Electrician Red Seal · Question
A licensed electrician is installing a new service entrance for a single-family dwelling. The service conductors will be run in PVC conduit to the meter base, then to the main service panel. According to the CEC, what type of seal-off or conduit body is required where the PVC conduit enters the building from underground, to prevent the migration of ground moisture and gases?
CEC Rule 12-000, and specifically Rules pertaining to underground conduits entering buildings (e.g., Rule 12-012 for raceways), require that raceways entering b
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Question: A licensed electrician is installing a new service entrance for a single-family dwelling. The service conductors will be run in PVC conduit to the meter base, then to the main service panel. According to the CEC, what type of seal-off or conduit body is required where the PVC conduit enters the building from underground, to prevent the migration of ground moisture and gases?
Answer options:
- A standard threaded conduit coupling
- An LB conduit body with a gasket ✅ A sealing compound fitting (duct seal or similar)
- A combination of a GUA conduit body and a sealing cement
Correct answer: A sealing compound fitting (duct seal or similar)
Explanation: CEC Rule 12-000, and specifically Rules pertaining to underground conduits entering buildings (e.g., Rule 12-012 for raceways), require that raceways entering buildings from areas subject to accumulation of moisture or gases, such as underground, be sealed to prevent their entry. A sealing compound fitting, often referred to as duct seal or similar, is used for this purpose. An LB body is for directional changes, and couplings are for joining conduit, neither provides the required sealing.
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