Electrak: underfloor to workstation system guide - Legrand

n Under-desk testing and accreditationn Under-desk and desktop British StandardsBS 6396 : 2008 Electrical Systems in Office Furniture and EducationalFurniture SpecificationBS 7671 : 2008 incorporating amendment No. 1 : 2011. Requirementsfor Electrical Installation (IET Wiring Regulations 17th Edition)Conforms to BS 5733 : 1995 incorporating amendment No. 1 andcorrigendum No. 1Conforms to the relevant parts of BS 1363 part 2Manufactured within an approved ISO 9001 : 2008 facilityQuality assurance certificate No. 2029Electrical test dataRated current up to 32 ARated voltage 250 V ~Frequency50/60 HzConductor resistance at 20°CFixedVolt dropLive and neutral2 socket module 1·5 m V/A4 socket module 3·0 m V/AProtection module 4·0 m V/A(depending on device)In-feeds :16 A 4·0 m V/A+1·5 mm 2 29 m V/A/m32 A 2·0 m V/A+4 mm 2 11 m V/A/mInterconnections :16 A/32 A 2·0 m V/A+1·5 mm 2 29 m V/A/m+4 mm 2 11 m V/A/mEarth fault loop impedanceRotatable2 socket module 0·8 mΩ 0·9 mΩ4 socket module 1·6 mΩ 1·7 mΩElectricity at Work Regulations 1989Health & Safety LegislationBelow is a brief outline of the main criteria within the standards :BS 6396 : 2008 was published with regard to the use of electricalequipment within general office and educational furniture. Thisstandard sets out in its scope the use and testing of electrical socketoutlets and associated wiring when used together with a 13 A BS 1363fused plug for mains supply and makes provision for the routing ofcables through furnitureFor compliance with this standard, socket outlet configurations of upto 4 outlets should be individually fused at 5 A and up to 6 outletsindividually fused at 3·15 AA note on individual socket fusing – BS 6396 Compliance :The standard requires individual socket fusing (as per the table below)Total number ofsockets2, 3 or 4 sockets5 or 6 socketsIndividually fusedat5 A3·15 AMeets the requirements of BS 7671 : 2008 (2011) (17th Edition)The Health and Safety Executive states that installations whichconform to the standards laid down in BS 7671 : 2008 (2011) areregarded by the HSE as likely to achieve conformity with the relevantparts of the Electricity at Work Regulations 1989Special note should be taken of regulation 543·7 withinBS 7671 : 2008 - Earthing requirements for the installation ofequipment having high protective conductor currentsRegulation 543·7 has particular importance when there is arequirement for a quantity of information technology equipmentbeing supplied from a final circuit in a location where the sum of theirprotective currents exceeds 10 mA in normal use. Due to current inthe protective conductor arising from the use of IT equipment, thereis a requirement to provide mechanically protected 4 mm 2 conductor(543·7·1·103 (ii)). Intersoc achieves this when wired in accordancewith the installation sheets by providing mechanically protected 5 mm 2protective conductors within the productUnder desk :2 socket module 1·5 mΩ4 socket module 3·0 mΩMaterial specificationProtection module 4·0 mΩ32 A rewirable in-feed terminal capacity 10 mm 2(depending on device)Module housing Heat resistant ABSIn-feeds :Socket outlets polycarbonate16 A 2·0 mΩBusbars high conductivity copper CW004A (C101)+1·5 mm 2 29 mΩ/mOther metalwork phosphor bronze CW451K (PB102), CW452K (PB103)32 A 2·0 mΩbrass CW507L (CZ107), CW508L (CZ108)+4 mm 2 11 mΩ/mhigh conductivity copper CW004A (C101) (1)Interconnections :16 A/32 A 4·0 m V/AOn desk :Module housing aluminium+1·5 mm 2 29 mΩ/mModule fascia flame retardant ABS+4 mm 2 11 mΩ/mSocket outlets polycarbonateEnd caps flame retardant ABSMechanical data(1) European grades with nearest British Standard shown in bracketsNumber of conductors 3Busbar conductor cross-sectional area 5 mm 216 A rewirable in-feed terminal capacity 10 mm 245