Which action is part of testing performed after installation or repair?

• A. Bypass grounding
• B. Check absence of voltage
• C. Increase voltage
• D. Ignore insulation continuity

Answer: (B)

Ensuring circuits are de-energized before work begins. After installation or repair, the crucial safety step is to verify absence of voltage with a properly rated tester. This confirms that the equipment you’ll work on is not energized, protecting you from shock or arc flash. Use the tester correctly: first verify the tester works on a known live source, then check that all conductors and equipment involved show no voltage. Apply lockout/tagout and re-check before proceeding to re-energize. Bypassing grounding undermines a fundamental safety path, so it’s unsafe. Increasing voltage during testing is dangerous and not a valid test step. Ignoring insulation continuity leaves potential faults hidden; while checking insulation is important, it’s not the action described as the required post-installation test to confirm zero voltage.