Which class has the highest voltage rating and what is that rating?

Which class has the highest voltage rating and what is that rating?

• A. Class 4 orange tag 36,000 V
• B. Class 3 green tag 26,500 V
• C. Class 2 yellow tag 17,000 V
• D. Class 1 white tag 7,500 V

Answer: (A)

Voltage tagging communicates the maximum voltage you may encounter and the corresponding safety controls. The highest rating shown is the orange-tagged Class 4, rated at 36,000 volts. That means equipment or circuits labeled this way are considered safe for work up to 36 kV and require the full set of appropriate PPE, clearances, and procedures. The other tags indicate lower voltages (26,500 V, 17,000 V, and 7,500 V), so they correspond to lower-risk work. Recognizing the highest rating helps ensure you apply the correct safeguards for the voltage level present.

Voltage tagging communicates the maximum voltage you may encounter and the corresponding safety controls. The highest rating shown is the orange-tagged Class 4, rated at 36,000 volts. That means equipment or circuits labeled this way are considered safe for work up to 36 kV and require the full set of appropriate PPE, clearances, and procedures. The other tags indicate lower voltages (26,500 V, 17,000 V, and 7,500 V), so they correspond to lower-risk work. Recognizing the highest rating helps ensure you apply the correct safeguards for the voltage level present.