Connecting to shore power

We want you and your vessel to be safe connecting to the power supply at Mana. Our requirements are standard across Marinas in New Zealand, and we’re happy to work with you to answer any questions about getting connected, or getting a vessel Electrical Warrant of Fitness (EWOF).

Electrical Supply

The electrical supply at Mana Marina is 230V, 50 Hz supplied by RCD protected socket outlets to fit a Standard IEC 60309-2 (round pin) plug rated at no less than 16A. (There are some 10A (flat pin) outlets in the Marina yet to be replaced).

An RCD is an electrical safety device that provides protection by rapidly disconnecting the electricity supply should a fault to earth be detected.

Vessel requirements

Vessels connecting to Mana Marina power must:

  • Display a current Electrical Warrant of Fitness (EWOF) that complies with AS/NZS3004.2.

  • Have a valid tested and tagged shore power lead with the correct plug that has a locking ring (IP67). Leads should be tested and tagged annually (AS/NZS3760). Leads should not exceed 25m in length and must not be connected to the electrical supply while it is coiled up.

Plugging In

  • Check with the Marina Office before plugging in.

  • Check if fittings are worn or damaged (if so, do not plug in and report to the Marina Office).

  • Test the RCD – If it does not trip, do not plug in and report to the Office immediately.

  • Turn off the power by pressing the RCD ‘test’ button before plugging in.

  • Insert the plug fully into the socket.

  • Engage the locking ring.

  • Ensure the power cable is free to move without snagging or chaffing and is free of the water.

  • Turn on the power switch and reset the RCD.

Check that the connection:

  • Permits vessel movement in the berth without undue stress on the lead and fittings.

  • Prevents water flowing along the lead reaching the vessel inlet or the supply plug.

  • Minimizes the likelihood of the plug or lead falling in the water.

  • Minimizes the possibility of accidental disconnection.

  • Doesn’t present a hazard to persons walking near the vessel.

Corrosion protection – Galvanic Isolator

Connecting a vessel to the marina power supply may result in accelerated corrosion of the vessel’s under water metallic parts. It’s strongly advised that additional sacrificial anodes or galvanic isolators complying with AS/NZS3004.2 Clause 4.6.4 be used to reduce these effects.

It’s the responsibility of the vessel owner to ensure that either an isolating transformer and/or a galvanic isolator is installed, if required.