Electrician Red Seal · Question
In a standard three-wire control circuit for a motor starter, what is the primary function of the holding contact (auxiliary contact)?
The holding contact, wired in parallel with the START button, ensures the magnetic starter coil remains energized once the START button is pressed and released,
Start free practice for Electrician Red Seal
150 questions · no signup required · 40 free questions per day
Question: In a standard three-wire control circuit for a motor starter, what is the primary function of the holding contact (auxiliary contact)?
Answer options:
- To provide overload protection for the motor.
- To switch the main power to the motor. ✅ To maintain the starter coil energized after the START button is released.
- To prevent accidental starting of the motor.
Correct answer: To maintain the starter coil energized after the START button is released.
Explanation: The holding contact, wired in parallel with the START button, ensures the magnetic starter coil remains energized once the START button is pressed and released, establishing a 'seal-in' or 'latch' condition.
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.