S.L. 545.24 Art. 22AProtection measures for electrical installations extensions. S.L. 545.41.

Where an extension of the electrical installation from a building unit is extended outside the boundaries of the building unit and where this is allowed in accordance with the Electricity

Connection and Supply Regulations, the authorised provider shall ensure that:

(a) where the extension of the electrical installation from a building unit is used to supply a private garage, a manual mechanical means of isolation of all phases and neutral wire shall be provided in an accessible position and immediately after the entrance of the garage. The wiring of the extension leading to the garage shall pass only through common areas;

(b) where the extension of the electrical installation is extended outside the boundaries of a building unit to supply outside facilities or equipment, a manual mechanical means of isolation of all phases and neutral wire shall be installed on the outside wall of the building unit in the immediate vicinity of the area or equipment being serviced. The isolation means shall not be of the remotely electrically operated type:

Provided that the wiring of the extension shall:

(i) be supplied through a dedicated circuit provided with the necessary protection;

(ii) be provided with the appropriate mechanical protection;

(iii) not be of obstruction in any way; and

(iv) be clearly indicated and documented if buried:

Provided further that the earthing system of any conductive structures or street furniture located within two meters (2) from the area or equipment being supplied from the premises shall be bonded with the earthing system of the said premises. The testing of the earthing system bonding shall be part of the routine testing of the electrical installation of the premises including the extension;

(c) where extension of the electrical installation from a building unit forming part of a building block is extended to connect electrical equipment on the roof of the same building block within which the building unit is physically located but not internally and physically interconnected with the roof:

(i) the said extension shall be supplied through a dedicated circuit provided with the necessary protection;

(ii) the said extension shall be provided with a manual mechanical means of isolation of all phases and neutral wire provided in the common area leading to the roof and located next to the electricity service meters supplying the units in the block. The isolation means shall not be of the remotely electrically operated type;

(iii) the earthing system of the building unit which is not physically interconnected to the common area of the building block shall be linked to the earthing system of the block. The testing of the earthing system bonding shall be part of the routine testing of the electrical installations physically found within the block; and

(iv) the means of isolation shall be properly labelled and documented to indicate the sources of supply and the location of the electrical equipment serviced. The earthing system bonding shall be properly labelled and documented.