Electrician Red Seal · Question
An electrician is installing a new 240 V, 30 A electric dryer in a residential basement. The dryer is located 2.5 m (8.2 ft) from the panelboard. What is the minimum size of copper conductor (NMD90 cable) required for this circuit, assuming the dwelling unit conductors meet the temperature limitations for 90 °C insulation?
For a 30 A circuit, Table 2 of the CEC indicates that a 10 AWG copper conductor is required for conductors having an insulation temperature rating of 90 °C (NMD
Start free practice for Electrician Red Seal
150 questions · no signup required · 40 free questions per day
Question: An electrician is installing a new 240 V, 30 A electric dryer in a residential basement. The dryer is located 2.5 m (8.2 ft) from the panelboard. What is the minimum size of copper conductor (NMD90 cable) required for this circuit, assuming the dwelling unit conductors meet the temperature limitations for 90 °C insulation?
Answer options:
- 14 AWG
- 12 AWG ✅ 10 AWG
- 8 AWG
Correct answer: 10 AWG
Explanation: For a 30 A circuit, Table 2 of the CEC indicates that a 10 AWG copper conductor is required for conductors having an insulation temperature rating of 90 °C (NMD90). While 12 AWG is rated for 20 A and 14 AWG for 15 A, 10 AWG provides the necessary ampacity for a 30 A load. 8 AWG would be oversized for this application.
Start free practice for Electrician Red Seal
150 questions · no signup required · 40 free questions per day
More about Electrician Red Seal
Related Questions
- A residential garage is to be wired with a 15 A, 120 V duplex receptacle. According to the Canadian Electrical
- During a renovation of a commercial kitchen, an electrician needs to replace an old single-phase, 240 V, 5 kW
- A commercial kitchen is being renovated, and several new 4 kW, 208 V, single-phase electric ovens are being in
- What is the minimum working space depth required in front of an electrical panel rated 200 A, 120/240 V, locat
- A Red Seal electrician is setting up temporary power for a construction site. The main temporary service is a
- A new industrial facility requires a 600 V, three-phase, 150 A feeder to supply a motor control centre. The co
More for Electrician Red Seal candidates
Practice tests
Question explanations
- A residential garage is to be wired with a 15 A, 120 V duplex receptacle. According to the Canadian Electrical
- During a renovation of a commercial kitchen, an electrician needs to replace an old single-phase, 240 V, 5 kW
- A commercial kitchen is being renovated, and several new 4 kW, 208 V, single-phase electric ovens are being in
- What is the minimum working space depth required in front of an electrical panel rated 200 A, 120/240 V, locat
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Electrician Red Seal Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.