Electrician Red Seal · Question
An electrician is installing a single phase, 240 V, 30 A outdoor air conditioner unit. The circuit is supplied from a panelboard in the basement. What is the minimum depth of burial required for rigid PVC conduit containing the conductors, measured from grade, in a residential driveway where it is subject to vehicular traffic, according to the CEC?
CEC Table 53 specifies minimum burial depths. For rigid PVC conduit under a residential driveway subject to vehicular traffic, the minimum depth of burial is 75
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Question: An electrician is installing a single phase, 240 V, 30 A outdoor air conditioner unit. The circuit is supplied from a panelboard in the basement. What is the minimum depth of burial required for rigid PVC conduit containing the conductors, measured from grade, in a residential driveway where it is subject to vehicular traffic, according to the CEC?
Answer options:
- 450 mm (18 in.)
- 600 mm (24 in.) ✅ 750 mm (30 in.)
- 900 mm (36 in.)
Correct answer: 750 mm (30 in.)
Explanation: CEC Table 53 specifies minimum burial depths. For rigid PVC conduit under a residential driveway subject to vehicular traffic, the minimum depth of burial is 750 mm (30 in.). This depth is increased for areas with heavier traffic or different wiring methods.
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