24 of 124  Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 08: Electrical Works  Synchronization of CHP units and diesel generators in case of power blackouts and brownouts. Diesel generator  should be selected for the emergency loads as per technical spects mentioned in ER. These loads should be  firstly operated by Diesel genset. Afterwards CHP gensets shall synchronize with diesel gensets and emergency  loads shall be taken over by CHP gensets. Hence, diesel genset power rating shall correspond to all the  emergency loads.  8.7 Assemblies (Panels)  8.7.1 General requirements  8.7.2 Construction  8_Vol3_d4 3_Section 8 electrical works_en_GIR rev6.doc  Assemblies shall be constructed so that normal maintenance may be carried out from the front. All cubicles  shall be fitted with doors at the front to access to control wiring and equipment. Front doors and covers shall be  hinged and lockable with a common key for each section. Assembly enclosures shall provide a minimum  protection of IP54, dust and vermin-proof. The construction shall comply with form 3b as detailed in EN  60439-1. They will be so constructed as to withstand all forces likely to be produced upon them during  transportation, erection, operation, and short-circuit conditions. Each compartment shall be isolated from the  nearby compartment by metallic barriers.  Assembly enclosures are to be fabricated from best quality of electro-galvanised mild sheet steel and cold rolled  sections bolted together. All steel parts shall be treated effectively against corrosion after manufacturing. The  treatment shall include sand blasting, anti-grease, primer and coating. Paint must be sprayed and kiln-dried. Assemblies shall provide minimum of 20% spare space for future use after installation is completed and when  handing over. The spare space shall be provided as coherent space in whole and empty sub-sections.  Building installation such as illumination, socket outlets, electrical heaters etc. shall be energised from  assemblies intended solely for building services.  Steel construction table shall be foreseen under the LV panels if necessary. Especially all LV rooms shall be designed as raised floor. Height shall be at least 1000 mm. Raised floor  material size shall be minimum 600x600mm. Raised floor material shall be TE-EN312 standards requirement.  Material shall be anti-static resistant to 40kV. Material shall be minimum 90 min fire proof. There must be at least 1 meter free distance between the back of the panel and the wall. There must be at least 2  meters free distance between the front of the panel and the wall.  The Contractor shall provide a drainage pit and a drainage pump under each panel room.  Assemblies shall comply with:  In the following low-voltage switchgear and control gear assemblies, panels, switchgears, switchboards,  cubicles, control gears etc. are referred to as assemblies.   EN 60204-1, Electrical Equipment on Machinery.   EN 60439, Low-voltage switchgear and control gear assemblies. 