12 of 124  Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 08: Electrical Works  Electrical and control system equipment and materials for installation in hazardous areas shall be labelled  according to IEC markings, listed, certified, accepted or otherwise determined to be safe by nationally or  internationally recognized testing authorities.  Ex (Explosion)-proof and/or intrinsically safe equipment shall be used at flammable gas and/or flammable gas  leakage hazard areas according to the related standards (CH4 or any others).  Contractor shall follow the regulations and/or rules about the Hazardous Area Classification according to the  following standards/directives and shall design/provide Hazardous Area Classification Lists and Drawings,  where hazardous risks may arise for flammable gas/vapours, atmospheres:   EN 60079-10, IEC 79-10: Electrical Apparatus for Explosive Gas Atmospheres.   CEI 31-35 and 31-35/A: Electrical Apparatus for Explosive gas atmospheres - Guides for classification of  hazardous areas.   ATEX 95  equipment  directive 94/9/EC, Equipment and protective systems intended for use in potentially  explosive atmospheres   ATEX 137  workplace directive 99/92/EC, Minimum requirements for improving the safety and health  protection of workers potentially at risk from explosive atmospheres  8.5 High Voltage Switchgear and Transformer Stations  8.5.1 General  High voltage switchgear and transformer stations shall be designed for safe, reliable and maintenance free  operation under the environmental conditions at the sites. Transformer rooms, medium voltage cubicle rooms, generator rooms and, all panel boards, will have steel sheet  door (it will not be used aluminum, approval will be taken from electrical authority, they will be accordingly  with TEDAŞ type MOD type electrical rooms standards. It will have minimum 2000 mm width and 3500 mm  height. The design and specifications for transformer stations shall be approved by local electricity authorities.  Mains supply voltage from local energy suppliers for plant, main inlet, current/voltage transformer ratios should  strictly be considered in selection of transformer and medium voltage cubicles. Supplying energy for the Plant, obtaining energy permission, depositing all the legal fees, supplying &  installation of energy power transmission line, making connections to end pole to be foreseen at the border of  WWTP, supply & installation of 34,5 kV MV XLPE cable to be laid between end pole and incoming MV  cubicle, which is installed in transformer station in Plant and cable terminations to inlet MV cubicle are within  scope of local administration. (Municipality or organization who have work to be done). Contractor will notify  demand regarding with plant to Administration. The equipment is located at the treatment plant property and is supplied under this Contract and is owned by the  Employer. Nevertheless, it shall be possible for skilled representatives from the power supply company to get  unlimited access to the transformer installations.  The components of the stations shall be a standard construction provided with standard equipment and  delivered ready for easy connection and reliable and safe operation. The stations shall consist of:   High voltage section with power circuit breakers, earthing connectors, over voltage protection equipment,  volt and ampere measuring transformers,  8_Vol3_d4 3_Section 8 electrical works_en_GIR rev6.doc 