What is initial verification and which checks are included?

• A. Visual inspection only.
• B. Only insulation resistance test.
• C. Checks performed after installation to verify safety and compliance; include continuity, insulation resistance, polarity, earth fault loop impedance, and functionality of protective devices.
• D. Power on test with live loads.

Answer: (C)

Initial verification is the set of checks done after an electrical installation is completed to confirm it is safe and compliant before it is put into service. It goes beyond a visual look and proves that the wiring and protections will respond correctly in normal and fault conditions. The checks include continuity of conductors and protective earths to verify there are no open circuits and that earth paths are intact; insulation resistance to ensure insulation hasn’t deteriorated and there won’t be leakage paths; polarity to confirm live, neutral, and earth are connected correctly; earth fault loop impedance to ensure protective devices will trip quickly enough in a fault; and the proper operation of protective devices (such as RCDs/MCBs) to verify they disconnect circuits when faults occur. These elements together confirm the installation is safe to energize and compliant with requirements. Visual inspection alone cannot reliably prove electrical safety, insulation resistance alone doesn’t confirm circuit integrity or device operation, and a power-on test with live loads introduces risk and isn’t how initial verification is performed.