What should you do before connecting a phase rotation meter to the lines being tested?

What should you do before connecting a phase rotation meter to the lines being tested?

• A. De-energize the line
• B. All of the above
• C. Inspect the meter and leads for damage
• D. Verify the meter is rated for the voltage applied

Answer: (B)

Safety and proper readiness are the focus here. Before connecting a phase rotation meter to three-phase lines, you should de-energize the circuit to remove shock and arc-flash risks and to prevent damage. Then inspect the meter and its leads for any damage, such as cracked insulation or loose connections, because damaged tools can cause arcing, misreadings, or equipment harm. Finally, verify that the meter is rated for the voltage you’ll apply, ensuring the insulation and components can handle that voltage without breaking down. Each step protects you, the equipment, and the accuracy of the reading, so doing all of them is the best approach.

Safety and proper readiness are the focus here. Before connecting a phase rotation meter to three-phase lines, you should de-energize the circuit to remove shock and arc-flash risks and to prevent damage. Then inspect the meter and its leads for any damage, such as cracked insulation or loose connections, because damaged tools can cause arcing, misreadings, or equipment harm. Finally, verify that the meter is rated for the voltage you’ll apply, ensuring the insulation and components can handle that voltage without breaking down. Each step protects you, the equipment, and the accuracy of the reading, so doing all of them is the best approach.