The electrical systems on vessels and offshore units to be classed by DNV shall be built according to DNV’s rules for electrical systems:

• DNV Rules for Classification of Ships, High Speed & Light Craft: Pt.4 Ch.8
• DNV Offshore Codes: DNV-OS-D201

The rules give requirements to the electrical system with respect to:

• Safety for personnel and fire hazard.
• Availability of electrical systems serving services important and essential for vessel operation.

As a basis for assignment of class, DNV will verify that the electrical installation complies with the requirements of the rules. The verification process comprises:

• Approval of system design.
• Equipment certification.
• Site survey.

• Classification of electrical systems
• Certification of electrical equipment
• Type approval of electrical equipment

• Main- and emergency switchboard
• Distribution switchboards
• Generators and transformers
• Electric motors
• Semi-conductor converters
• Cables
• Power Management Systems