- A
Wear a hard hat to protect against head injuries.
Why wrong: While a hard hat is good practice, it is not the most important safety precaution for this task. The primary risk is electrical shock from nearby wiring.
- B
Use a non-contact voltage tester to check for live wires.
This is the most important precaution. Before running cables, the technician should verify that no live electrical wires are in the path to avoid electrocution.
- C
Ensure the area is well-ventilated.
Why wrong: Ventilation is important for some tasks, but it is not the primary concern when running cables in a drop ceiling.
- D
Wear anti-static gloves to prevent ESD.
Why wrong: ESD is a concern when handling sensitive equipment, but the main hazard in a drop ceiling is electrical shock from existing wiring.
Quick Answer
The answer is to use a non-contact voltage tester to check for live wires before running cables in a drop ceiling. This is the most important safety precaution because drop ceilings frequently conceal unmarked electrical wiring, and accidentally cutting or damaging a live wire can lead to severe electrocution, fire, or equipment damage. A non-contact voltage tester allows you to detect AC voltage without physical contact, ensuring the area is safe before handling cables. On the CompTIA A+ Core 2 220-1202 exam, this question tests your understanding of workplace safety procedures and hazard identification—a common trap is choosing a fire extinguisher or PPE, but the immediate step is always verifying the absence of live voltage. Remember the memory tip: “Test before you touch—non-contact is a must.”
220-1102 Safety Procedures and Compliance Practice Question
This 220-1202 practice question tests your understanding of safety procedures and compliance. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
During a network upgrade, a technician needs to run new Ethernet cables through a drop ceiling. What is the most important safety precaution to take?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use a non-contact voltage tester to check for live wires.
The most important safety precaution when running cables through a drop ceiling is to use a non-contact voltage tester to check for live wires. Drop ceilings often conceal electrical wiring, and accidentally cutting or damaging a live wire can cause electrocution, fire, or equipment damage. A non-contact voltage tester allows the technician to detect the presence of AC voltage without making physical contact, ensuring the area is safe before handling cables.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Wear a hard hat to protect against head injuries.
Why it's wrong here
While a hard hat is good practice, it is not the most important safety precaution for this task. The primary risk is electrical shock from nearby wiring.
- ✓
Use a non-contact voltage tester to check for live wires.
Why this is correct
This is the most important precaution. Before running cables, the technician should verify that no live electrical wires are in the path to avoid electrocution.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Ensure the area is well-ventilated.
Why it's wrong here
Ventilation is important for some tasks, but it is not the primary concern when running cables in a drop ceiling.
- ✗
Wear anti-static gloves to prevent ESD.
Why it's wrong here
ESD is a concern when handling sensitive equipment, but the main hazard in a drop ceiling is electrical shock from existing wiring.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the distinction between general safety equipment (like hard hats) and task-specific electrical safety tools, so the trap here is that candidates may choose a hard hat as a 'common sense' safety item, overlooking the more critical step of verifying that no live electrical wires are present in the drop ceiling.
Detailed technical explanation
How to think about this question
A non-contact voltage tester (also known as a voltage detector or tick tracer) works by sensing the electric field around a live conductor, typically using capacitive coupling. It can detect AC voltages from around 50V to 1000V without needing to touch bare wires, making it ideal for identifying hidden live cables behind ceiling tiles or insulation. In real-world scenarios, technicians often encounter unlabeled or abandoned electrical cables that may still be energized, and failing to test can lead to severe injury or death.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 220-1202 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this 220-1202 question test?
Safety Procedures and Compliance — This question tests Safety Procedures and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use a non-contact voltage tester to check for live wires. — The most important safety precaution when running cables through a drop ceiling is to use a non-contact voltage tester to check for live wires. Drop ceilings often conceal electrical wiring, and accidentally cutting or damaging a live wire can cause electrocution, fire, or equipment damage. A non-contact voltage tester allows the technician to detect the presence of AC voltage without making physical contact, ensuring the area is safe before handling cables.
What should I do if I get this 220-1202 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
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