With reference to shore electrical supply to a ship, how do you sketch the shore power arrangement and carry out checks prior to connection, and safely connect it?

flowchart LR
    Shore[Shore\nsupply] -->|Cable| Box[Ship’s\nconnection box]
    Box --> CB[Isolation\nbreaker]
    CB --> SB[Main\nswitchboard]
    SB --> Loads[Ship’s\nloads]
    Box --> Earth[Earthing\nto hull]

• Arrangement: shore supply → shore cable → ship’s connection box → isolation/breaker → main switchboard → earthing to hull
• Pre-connection checks: vessel’s circuit in good order, equipment compatible with external supply characteristics, prevent parallel with ship’s supply, isolation means provided and accessible
• Tests at first call: visual inspection; power frequency test for switchgear and voltage test for cable; insulation resistance; earthing resistance; functional tests of protection devices, interlocking, control equipment; equipotential bond monitoring (if applicable); phase sequence; cable management; integration tests; emergency stops
• Safe connection: minimal connections, cables protected from physical damage, earth conductors to vessel structure, confirm readiness before shore supply switched on
• ETO role: verifies arrangement, performs tests, supervises connection, records in electrical log
• Governing instruments: Rec 182, MSN 1213