Electrician Red Seal · Question
A continuous duty motor is protected by a thermal overload relay. The relay should be set to trip at no more than what percentage of the motor's service factor nameplate current?
CEC Rule 28-306(1) states that for a motor with a service factor of 1.15 or greater, the overload device must be set to trip at not more than 125% of the FLC. H
Start free practice for Electrician Red Seal
150 questions · no signup required · 40 free questions per day
Question: A continuous duty motor is protected by a thermal overload relay. The relay should be set to trip at no more than what percentage of the motor's service factor nameplate current?
Answer options:
- 100% ✅ 115%
- 125%
- 140%
Correct answer: 115%
Explanation: CEC Rule 28-306(1) states that for a motor with a service factor of 1.15 or greater, the overload device must be set to trip at not more than 125% of the FLC. However, for motors with a SF less than 1.15 (or marked 1.0) or for motors where the SF current is marked, the trip setting is not more than 115% of that marked SF nameplate current.
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.