PROTECTIVE EARTHING / MAIN SWITCHBOARD

EL-020

PHOTO RECORD / FACT

Electrical systems

EL-020 / PROTECTIVE EARTHING / MAIN SWITCHBOARD

PRIORITY / MAJOR

OBSERVED

A break in the protective earthing conductor was recorded in the main switchboard room: the metal earthing strip is not connected at the break.

RISK

Loss of protective earthing continuity, requiring verification of the electrical continuity of the equipment’s protective earthing circuit in this area.

WHAT TO CHECK

The earthing and equipotential bonding design, actual conductor continuity, main switchboard equipment connections and the results of the necessary measurements.

RECOMMENDED ACTION

Restore the connection specified in the design, check the connection quality and confirm protective circuit continuity through appropriate measurements before acceptance.

PRIORITY / MAJOR

Priority reflects an engineering assessment of the recorded condition in the circumstances of the particular project. It does not replace a designer’s opinion, testing or measurements where these are required.

These examples show the format of engineering records. The final assessment takes into account the design documentation, design solutions and conditions of the specific project.