Directive of the European Parliament and of the Council of 12 December 2006 laying down technical requirements for inland waterway vessels and repealing Council Directive 82/714/EEC (2006/87/EC) (repealed)

Article 9.07 Distribution systems

1. The following distribution systems are allowed for direct current and single-phase alternating current:

(a) two-conductor systems of which one is earthed (L1/N/PE);

(b) single-conductor systems using the hull return principle, only for local installations (for example, starting gear for combustion engines, cathodic protection) (L1/PEN);

(c) two-conductor systems that are insulated from the hull (L1/L2/PE).

2. The following distribution systems are allowed for three-phase alternating current:

(a) four-conductor systems with earthing of the neutral point, not using the hull return principle (L1/L2/L3/N/PE) = (network TN-S) or (network TT);

(b) three-conductor systems insulated from the hull (Ll/L2/L3/PE) = (network IT);

(c) three-conductor systems with earthing of the neutral point using the hull return principle, however, that shall not be allowed for terminal circuits (L1/L2/L3/PEN).

3. The inspection body may allow the use of other systems.