If the motor shown in the illustration will...

Question 1 / 2066636eed28f7522a1c51d7f2

Question 1 of 2066636eed28f7522a1c51d7f2

If the motor shown in the illustration will not start when the "off-run" switch is placed in the run position, which of the listed components should be checked FIRST? Illustration EL-0017

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Question 1 of 20

66636eed28f7522a1c51d7f2

If the motor shown in the illustration will not start when the "off-run" switch is placed in the run position, which of the listed components should be checked FIRST? Illustration EL-0017

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🔍 Key Concepts

• Follow the control circuit path from L1 through the OFF‑RUN switch to the M (contactor) coil and then back through the overload relay contact (OL) to the line • Distinguish between the power circuit (L1‑L2‑L3 through heaters to the motor) and the control circuit (switch, M coil, OL contact) in the lower half of the diagram • Think about what could open the control circuit automatically to protect the motor, and what you can easily reset without replacing parts

💭 Think About

• Starting at L1 in diagram B, trace the path when the OFF‑RUN switch is in RUN: where does the current go before it reaches the M coil, and what normally‑closed device is in series with that coil? • Which of the listed components would prevent the motor from starting even though the line disconnect is already closed and all fuses are good? • From a troubleshooting standpoint, which action is a simple check/reset, and which require removing and electrically testing components?

✅ Before You Answer

• Verify which symbol in the control circuit is the normally‑closed overload contact (OL) and whether it is in series with the M coil. • Confirm that the disconnect switch (DS) in the power circuit must already be closed for the control circuit to be energized as shown. • Compare which choices involve resetting something versus replacing components; think about what you would logically check first before using a meter or changing parts.

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Question 1 of 20

If the motor shown in the illustration will not start when the "off-run" switch is placed in the run position, which of the listed components should be checked FIRST? Illustration EL-0017

check the main contactor coil for continuity, replace as necessary

check the overload relay (OL) heaters for continuity, replace as necessary

check the disconnect switch open, open as necessary

check the overload relay for tripped condition, reset as necessary

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Question 1 / 2066636eed28f7522a1c51d7f2

Question 1 of 2066636eed28f7522a1c51d7f2

If the motor shown in the illustration will not start when the "off-run" switch is placed in the run position, which of the listed components should be checked FIRST? Illustration EL-0017

Back

Question 1 of 20

66636eed28f7522a1c51d7f2

If the motor shown in the illustration will not start when the "off-run" switch is placed in the run position, which of the listed components should be checked FIRST? Illustration EL-0017

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed