AS NZS 3004.1:2014 pdf free.Electrical installations—Marinas and boats Part 1: Marinas.
1.5 ALTERATIONS, ADDITIONS AND REPAIRS
Any alterations, additions or repairs to electrical installations in marinas shall be in accordance with AS/NZS 3000. In addition, the replacement, on an individual basis, of electrical equipment with like electrical equipment shall be classified as a repair to the existing installation.
1.6 MARINE ENVIRONMENT ELECTRICAL SAFETY CONSIDERATIONS
1.6.1 Scope
This Clause details specific variations to the requirements of ASINZS 3000 and the reasons for these variations.
1.6.2 Additional risk factors
Marina installations are characterized by the risk of corrosion, the effects of movement of structures, mechanical damage and the risk of electric shock being increased by a reduction in body resistance and contact of the body with earth potential.
1.6.3 Additional protection for equipment safety and instruction labels
Equipment shall be adequately protected against external influences. ‘External influences’
include but are not limited to the effects of—
(a) a corrosive salt-laden atmosphere;
(b) water spray;
(c) water level variation (e.g. tidal and wave action);
(d) high temperatures; and
(e) prolonged exposure to ultraviolet radiation.
1.6.4 Unacceptable measures against electric shock
The following methods of protection against electric shock are not permitted:
(a) Protection by means of obstacles.
(b) Protection by means of placing out of reach.
1.7 MINIMIZATION OF GALVANIC CORROSION
Metallic hulls or hull skin fittings might be subject to accelerated galvanic corrosion mechanisms if the boats are connected to a marina low-voltage electrical supply protective earthing system. If an adequate system of sacrificial anodes is installed, this may not pose a problem. An isolating transformer or a galvanic isolator may be installed to reduce this problem. Isolating transformers may be permanently installed either on the boat or on shore in the low-voltage electrical supply to the boat.
Galvanic isolators may be installed in the shore power a.c. protective earth conductor on the boat only. A galvanic isolator shall not be installed at any other point in the shore power protective earth conductor.
The galvanic isolator shall comply with Clause 4.6.4 of AS/NZS 3004.2:2008.
NOTE: Guidelines on cathodic protection are given in the AS/NZS 2832 series of Standards.AS NZS 3004.1 pdf download.