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HomeMy WebLinkAbout2560489 - F.I. Received Doc. - Lighting Design ReportLighting Design Report and Speciflcation - 1 - Lighting Design Report and Specifications for Doohamlat Castleblaney, County Monaghan 1. General Information The Safety, Health and Welfare at Work (Construction) Regulations 2013 clearly deflnes certain duties for Designers and for Project Supervisors, Design Stage. In order to meet these duties and to assist other designers and supervisors involved in this project to meet their duties we provide the following information. It must be noted that this information is based on our observations and there may be other risks that are beyond our knowledge on this project. 1.1. Client & Project Project Name Housing Development for 45 Units at Doohamlet Project Location Doohamlat Castleblaney, Co Monaghan Client Connolly Partnership 1.2. Design Role A completed lighting design for the above project to comply with relevant EU Norms, National Standards, and best guidance documents as appropriate. European lighting standards I.S. EN 13201-2:2015 I.S. EN 13201-5:2015 I.S. EN 12464-2:2007 Code of practise BS 5489-1: 2020 Professional guidance documents ILP PLG03 (2012)| Technical Report 12. ILP (2007)| Guidance Note 01/20. ILP (2020) Lighting Guide 21. SLL (2021) Electrical standard I.S. 10101: Latest version ESBN Requirements National Code of Practice for the Customer Interface. Lantern standard EN 60598 Column standard EN 40 Column calculation method BD94/07 Steelwork protection EN 1461 Electrical vehicle charging Building Regulations Technical Guidance Document L 2022 Building Regulations Technical Guidance Document M 2022 RECEIVED: 20/07/2026 Lighting Design Report and Speciflcation - 2 - Directive 2014/94/EU 2014 Local authority development plan. The design has been completed based on the drawings provided. The design covers the physical area deflned by the calculation grids marked in the lighting design booklet accompanying this report. 2 Safety We are committed to safe working practises and have done all in our power to identify and 'design out' hazards. If there is any detail within this design that requires clariflcation or if you need further information, please contact us and we will endeavour to co-operate fully. 2.1 Particular Risks Using Schedule 1 Non-exhaustive List of Work Involving Particular Risks to the Safety, Health and Welfare of Persons at Work as a template, we have identifled the following risks that affect the design process: None that we could identify. 2.2 Other Risks In addition to the risks described in 2 Particular Risks above, we have identifled the following risks that affect the design process: None that we could identify. 2.3 Construction and Risk Control It is the contractor's responsibility to ensure that their method of work meets their duty of care and requirements under the Safety, Health and Welfare at Work (Construction) Regulations 2013 and any other national or local requirements. 2.4 Electrical Safety Tests It is the electrical contractor's duty to calculate the appropriate fuse size for the electrical infrastructure. It is the contractor's duty to ensure that all his electrical work meets relevant national and local standards. The contractor must ensure that all electrical safety testing is completed by a competent member of staff and that all test results are recorded and signed, and a copy given to the client and to us. 2.5 Lighting Columns as a Hazard RECEIVED: 20/07/2026 Lighting Design Report and Speciflcation - 3 - Public lighting columns are deflned in BS 5489 -1:2020 6.13 as a potential hazard to road users and deflnes minimal setbacks to the column face from the edge of the carriageway. In general, the edge of the carriageway is deflned by the raised kerb in residential developments. In this project we have located the columns at the back of the footpath or set back by at least 800mm clearance between column face and kerb edge. 3 Lighting Design Using S.R. CEN/TR 13201-1:2014 Table 4 we have determined that designing the lighting within the residential area comply with I.S. EN 13201-2:2015 P4 is appropriate for this project given its size, location, and usage. 3.1 Dimming We have designed the lighting to dim by 25% from 00:00 to 06:00 in line with dimming proflle U14. 3.2 Constant Lumen Output The luminaires shall utilise constant lumen output. 3.3 Switching The luminaires will be operated by PECUs switching at 35/18 ux levels. 3.4 Lighting Impact We select the luminaire that uses the lowest energy consumption for the speciflc application. We utilise the most appropriate lumen package (lumen output and distribution optics) to ensure efficient lighting of the target area and to minimise light spill outside of the area. Our energy consumption calculations are based on the requirements of IS EN 13201-5:2015. We design using full cut off luminaires to ensure there is no direct upward light. We ensure that threshold increment is included in our calculations so that the luminaires are not a glare source. These measures, along with our general lighting design approach, means that light spill outside the project boundary is minimised. By using a tailored lumen package, we minimise refiected, and refracted light as far as practicable. We believe our lighting designs utilise the most energy efficient, sustainable luminaires currently available on the market and refiect practises laid out in relevant standards and RECEIVED: 20/07/2026 Lighting Design Report and Speciflcation - 4 - in guidance notes from the professional bodies of which we are members, the Institution of Lighting Professionals and the Society of Light and Lighting. 4 Lighting Performance The lighting design has been carried out based on the performance of the selected luminaire. Any changes to the selected luminaire will make our design obsolete. This includes variation of speciflcation of the luminaire by any member of the supply chain, including the original equipment manufacturer. Once this design has been approved by the local authority, any changes to the design will also require approval. 4.1 Maintenance Factor The luminaire manufacturer's stated lumen depreciation factor is 0.9 at 100,000 hours at 25° C for drive current selected. The lamp survival factor is 1. The mounting height, environmental zone and cleaning cycle derives a luminaire maintenance factor of 0.92 from table C.1, BS 5489-1:2020. This results in a combined maintenance factor of 0.83 which has been applied to the calculations. 4.2 Correlated Colour Temperature The light source shall have a correlated colour temperature (CCT) of 4,000 Kelvin. 4.3 Luminaire Selection We have selected a luminaire based on energy consumption, photometric performance, and general quality. Ducting must be laid in accordance with the National Rules for Electrical Installations I.S. 10101: Latest version. No cable joints are permitted. Cables can share ducts, but they must not be jointed in any manner. 4.4 Luminaire Variation While we endeavour to use the smallest number of luminaire variations on our projects, our primary aim is to comply with relevant European lighting standards while minimising energy consumption, minimising light pollution and light spill. We achieve this by selecting an appropriate lumen package to suit the geometry of the area to be illuminated. 4.5 Design Luminaire In this instance, we have selected a design based on the stated photometric performance and energy consumption of the ASD Highway Diamond range, to blend with existing lighting. 4.6 Existing Lighting RECEIVED: 20/07/2026 Lighting Design Report and Speciflcation - 5 - The existing columns on the entrance road will require relocating to the back of the planned footpath. Our calculations show that this will not negatively impact on the lighting levels. Please note that if this lighting equipment has been taken in charge, then approval for the work will be required from the local authority, and elements of the work can only be undertaken by the council's approved public lighting contractor. 5 Columns We have used 6m columns throughout the development. 5.1 Trees and Landscaping Trees and tall growth should be pruned back so that they do not cause shadowing. No trees or tall shrubs can be planted within 6m of the column. 6 Cable and Ducting It is not possible to incorporate the blocking and shadowing effect of trees, or other obstructions into the lighting level calculations. 6.1 Public Lighting Service Pillars The project will require two service pillars. Service pillars must be located in places that afford ease of identiflcation and access for future maintenance crews. They must be located logically so as not to cause any risk to maintenance crews in the future. 6.2 Public Lighting Circuits The service pillar MP 1 will supply three circuits, while MP 2 will supply two. Only 2 core NYCY electrical cable, of the size specifled in the accompanying electrical calculation shall be used. The earth conducting sheath shall be connected to terminals using appropriate glanding mechanisms. SWA cable shall not be used. 7 Public Lighting Energy Consumption The total energy consumption for this project will be 618 kW/h per annum. 8 EV Charging Meter Two CT three phase meters will be required. The meters will supply multiple three phase circuits, as shown on the accompanying drawing and electrical schematic. The meters shall only be used for the EV charging infrastructure. RECEIVED: 20/07/2026 Lighting Design Report and Speciflcation - 6 - 8.1 EV Charging Ducts The EV charging supply ducts shall have a minimum 250mm internal diameter. Bends shall be gentle with a minimum radius of 1000mm. 8.2 EV Charging Circuits Each individual EV charger shall be supplied by a single dedicated circuit. No more than one charger shall be connected to a circuit. Each circuit shall be protected by a RCBO Type B, as sized in the accompanying electrical calculations. The electrician shall determine correct trip time based on appropriate on- site testing. Only 4 core NYCY electrical cable, of the size specifled in the accompanying electrical calculation shall be used. The earth conducting sheath shall be connected to terminals using appropriate glanding mechanisms. SWA cable shall not be used. 8.3 EV Charging Future Infrastructure We have designed a ducting layout to permit future potential expansion of charging points as required by TGD L 2021. 9 EV Charging Management EV chargers automatically balance electrical loading to ensure maximum charge current can be delivered to the vehicle. Chargers will also automatically detect if the vehicle can except single phase or 3 phase charging. It is necessary therefore that EV chargers communicate with each other via 4G network. It is good practice to alternate phase loading at the meter by alternating the connections to the chargers. 9.1 Load Balancing If there are no other electrical loads supplied from the DSO meter, then a static load management system is adequate. If additional connections are made to the meter, then a dynamic load management system will be required. As this installation will have dedicated meters, static load management will be used. Reimbursement The chargers will have RFID readers which will enable the management company to apply a fee to users of the charging service. This will require setting up via the management company, or other third party. Appendix B Luminaire Specification RECEIVED: 20/07/2026 Lighting Design Report and Speciflcation - 7 - 1. Luminaires shall be fully compliant with the Single Light Regulation ~ Commission Regulation (EU) 2019/2020 of 5th December 2019. The luminaire shall be registered on the EPREL website and labelled in accordance with the regulation requirements. 2. Luminaires shall be registered on SEAI's Triple E and ACA registers. 3. Luminaires shall be CE marked in line with Directive 2014/35/EU or later. Note that UK Equivalent Certiflcation is not valid in the Republic of Ireland. 4. Luminaires shall be manufactured in compliance with IEC 62504:2014 + A1:2018 or later. 5. Luminaires shall be compliant with the following electrical safety standards: o EN 60598-1:2015 + A1:2018 o EN 60598-2-3:2003 + A1:2011 o EN 6038-1:2017 + A1:2017 o EN 62031:2008 + A2:2015 o IEC 61347-2-13:2014 + A1:2017 6. Luminaires shall be compliant with EN 62471:2008. 7. Luminaires shall be complaint with EN 55015:2013+A1:2015, and with EN 61547:2009 COR 2015. 8. Luminaires shall be compliant with the following performance standards: o EN 62384:2006 + A1:2009 o EN 62386 101:2014/AMD1:2018 o AAA EN 62386 102:2014/AMD1:2018 o EN 62386 103:2014/AMD1:2018 o EN 62386-207:2018 o EN 62707-1:2013 + A1:2018 o EN 62717:2017 + A2:2019 o EN 62722-2-1:2016 o EN 61643-11:2012 + A11:2018 o IEC 62262:2002 o IEC TR 62696:2011 9. Luminaires shall be manufactured in accordance with the European Directive on Waste Electrical and Electronic Equipment (WEEE). 10. The luminaire shall be designed speciflcally to be used with LED light sources. 11. The correlated colour temperature (CCT) of the source shall be as described in Section 4.2 of this design report. 12. The binning of the LED chips shall be within a flve step McAdam ellipse. 13. The luminaire shall be rated to operate at 230V * 10% at 50 Hertz. 14. Power factor correction shall not exceed 0.9 at 100% lumen output, or 0.8 when dimmed. RECEIVED: 20/07/2026 Lighting Design Report and Speciflcation - 8 - 15. The luminaire shall utilise constant lumen output (CLO), unless the lumen depreciation factor (LDF) is less than 98% at 100,000 hours operation, in which case the additional complexity may make CLO obsolete. 16. The luminaire shall be fltted with surge protection in accordance with EN 61643 - 11:2012 + A11:2018 rated 10kA/1010kV. Surge protection shall be the flrst component encountered in the circuit to ensure protection for all components within the luminaire. 17. The luminaire, and mounting arrangement, shall be constructed in a robust manner and suitable for Irish climatic conditions in an ambient temperature of -35°C to +55°C. The luminaire shall have a minimum impact resistance of IK08. 18. The luminaire body shall be protected against ingress to IP 66. 19. The luminaire shall be protected to a level of 1,000-hour salt fog test as a minimum in accordance with EN ISO 9227. 20. Except for blanking covers to permit detection, communications, or other such functionality, the luminaire shall be manufactured from die cast corrosion resistant marine grade aluminium alloy in accordance with either: EN AC 44100, or EN AC 44200, or EN AC 44300. 21. The luminaire, and mounting arrangement, shall be powder coated in accordance with relevant industry norms, or EU standard. All externally visible components of the luminaire shall be of the same colour, except for decorative applications. 22. The light source shall be modular and replaceable on site. The module shall be flxed in a manner that maximises heat transfer from the chip and board. 23. The light source shall be protected by an appropriate material and shall be protected against ingress to IP 66 and have a minimum impact resistance to IK08. 24. The original equipment manufacturer (OEM) shall ensure that all components within the luminaire are compatible in both performance and thermal management to ensure that lumen depreciation factor (LDF) or any other life prediction methodology is not shortened or compromised. This shall include any component, or accessory. 25. The driver shall be DALI registered and capable of two-way communication and interaction with a control and management system (CMS) or shall be capable of being controlled by 1 to 10. 26. The driver shall have over temperature protection. 27. The ingress protection rating of the entire luminaire shall be maintained over the operational life of the product. 28. The luminaire shall be provided by the original equipment manufacturer (OEM) prewired with a minimum 1.5mm? artic fiex for mounting heights up to 6m, and a minimum 2.5mm? artic fiex for mounting heights above 6m. The cable shall be suitable for the application and comply with BS 6004. The cable shall be of sufficient length to permit an adequate drip loop to be provided on luminaire RECEIVED: 20/07/2026 Lighting Design Report and Speciflcation - 9 - installation. The cable shall have sufficient cores to allow for the safe electrical connection, and for data transmission from ground level to the luminaire. Colour codes of the conductor insulating shall be in accordance with I.S. 10101:2020, or later. The requirement for ground level data transfer excludes the following local authorities: o Wexford County Council. o Laois County Council. o South Dublin County Council. o Dun Laoghaire Rathdown County Council. o Fingal County Council. o Dublin City Council. 29. All flxtures, bolts, screws all other mechanical flxtures shall be captive and constructed from noncorrosive materials. 30. All covers, or openings, required to be opened during installation or maintenance shall be captive when open. 31. All wiring shall be heat resistant and comply with I.S. EN 60598. 32. Electrical connection terminals shall be indelibly marked to indicate all wiring connections and use shrouded screws. Control equipment shall bear a clear circuit diagram to indicate all component connections in a clear and concise manner. Operating voltages shall be clearly marked within the luminaire enclosure. 33. Electrical terminals shall be capable of terminating three core 2.5mm fiexible cable. 34. LDF shall not exceed 0.1 at 100,000 operating hours in Irish climatic conditions and ambient temperatures. 35. Lamp survival factor (LSF) shall be equal to, or less than 1 at 100,000 operating hours in Irish climatic conditions and ambient temperatures. 36. The temperature that photometric data is measured shall be stated and shall not be less than 15°C. 37. The weight of the entire luminaire assembly shall not exceed 18kg and shall be stated. 38. The maximum projected side area (windage) of the luminaire shall not exceed 0.18m? and shall be stated. 39. A comprehensive written warranty shall be provided for the entire luminaire covering a minimum period of ten years from date of installation. Full details will be provided in how the local authority can access this warranty if they are taking the luminaire in charge rather than procuring directly. Appendix C Column & Bracket Specification RECEIVED: 20/07/2026 Lighting Design Report and Speciflcation - 10 - The column, column door, bracket and any adaptors shall be designed to comply with all sections of I.S. EN 40 and in accordance with BD 94/07. The column, bracket and any adaptors shall be of suitable size to bear the specifled lantern and to achieve a nominal height to light source as called for by the lighting design. Columns, column doors, brackets, and any adaptors shall have a fatigue design life of a minimum 30 years in Irish coastal environment in accordance with I.S. EN 40 -3-3. All columns, column doors, brackets, and any adaptors shall have a written warranty for ten years. Written details shall be provided on how a local authority shall access this warranty where they are not part of the supply chain, such as when taking in charge. The column, column door, bracket, and any adaptor manufacturer shall be registered with and certifled by either NSAI, British Standards Institute of Quality Assurance Services or Lloyds Register Quality Assurance Register for the design, manufacture, supply and veriflcation of road lighting columns and brackets under their quality assessment schedule to ISO 9001 latest version. The quality assurance certiflcation shall relate to the speciflc lighting column material being proposed. The local authority reserves the right to request proof of certiflcation from the proposed column manufacturer. Aluminium columns can be considered for use, especially as they can be more environmentally Brackets will be manufactured from the same material as the column. Columns shall be located to provide sufficient set back from the kerb edge so as not to present a hazard to road users. Where cycle lanes are present, sufficient set back shall be provided so as not to endanger cyclists. On shared surfaces such as Homezones provision shall be made so that columns can be positioned safely. Often it will fall to the project architect to provide appropriate space for the column and associated infrastructure, including ducting and section pillars. Public lighting columns cannot stand in private property. The column will comply with the following speciflcations: 1. The column, column door, bracket and/or adaptor shall be of functional design and suitable for the location and intended loading. 2. The column, column door, bracket and/or adaptor shall be protected against the ingress of moisture at the top and at the door entry. RECEIVED: 20/07/2026 Lighting Design Report and Speciflcation - 11 - 3. Steel column, column door, bracket and/or adaptor shall be galvanised to BS EN 1461 latest version. 4. Column roots shall be protected with bitumen or other appropriate material. This protection should extend 100mm above ground level. Column roots shall have a cable slot at an appropriate depth to allow electrical cable ingress and egress. The cable slot shall be formed so as to prevent damage to draw rope or electrical 5. Doors shall be fltted in such a way as to minimise the risk of being pried off. Twin locks shall be fltted. Column and door should have earth terminals of suitable mechanical type. 6. A suitable non-hygroscopic backboard will be fltted in line with the door and be large enough to take local authority approved termination units. 7. The space between the door and the backboard will be sufficient to enable the fltment of termination units as required by the County Council. 8. Each lantern shall be individually protected with a suitable fuse unit in the column base. 9. Neutral blocks, or looping-in blocks, shall be of an approved grooved bore 63A type, fully insulated and solidly mounted on the backboard. 10. Columns shall be wired with a minimum 2.5mm? PVC/PVC stranded copper cable. 11. All columns shall comply with I.S. 10101:2020 and regulations with regard to minimum door height. 12. Columns shall be installed so that their doors are aligned at 90° to the curb edge to enable maintenance personnel face towards oncoming traffic. 13. Close protection of street lighting lanterns to be provided by a 25A rated cut -out loaded with a 6A fuse incorporating a cam lever single pole disconnection. The cut- out will use a separate neutral and earth. The cut-out must provide ingress protection to IP21 as deflned by EN 60529. This fuse type is colloquially identifled as conforming to BS 88. 14. The cut-out shall be constructed to conform to the requirements laid out in BS 7654 for example: MC040SLF 25A SLCO TYPE 1 (SNE) by Lucy Zodion. Note that other cut - outs that meet this speciflcation will be acceptable so long as they are an established and recognised, quality brand and do not have a negative impact on maintenance stock requirements of the local authority or their agents. 15. Where three phase supply is required, then separate link boxes will be installed in the column below the cut-out to allow for interconnecting. Link boxes must comply with the requirements laid out in BS 7657:2010. Link boxes will be supplied for live 1, live 2, live 3, neutral and flnally earth. The link box must provide ingress protection to IP21 as deflned by EN 60529. 16. All terminals shall be formed from solid brass and be electroplated for temperature rise stability. Terminals shall have a serrated bore to ensure good contact with all RECEIVED: 20/07/2026 Lighting Design Report and Speciflcation - 12 - types of conductors. The incoming terminals shall have additional protection, provided by a red safety shield to guard against accidental contact with live metal. 17. All components required will be flrmly flxed to the backboard of the column in a tidy professional manner. All conductors will be stripped to the appropriate length to allow for connection. No exposed conductors shall be allowed. 18. The column shall be earthed from the incoming cable via a 6mm? PVC cable which will be connected to the column by a crimped lug. 19. The column shall carry a unique, permanent, and weather resistant identiflcation label. label shall durably legible. It shall be mounted in the column base and be visible after electrical flt out has been completed. The label shall carry the following information: o The manufacturer. o Product model. o Year of manufacture. o Standard to which the product has been designed and manufactured to comply with. 20. Where future access by maintenance contractors MEWP is difficult, or require reversing over signiflcant distances, then hinged columns shall be used. Appendix D Ducting Specification 1. Ducting shall comply with I.S. EN 61386 -1-22-23-24 and shall be single wall, coloured red duct shall be 107mm with a minimal wall thickness of 5mm. Each length of duct shall be stamped with the legend 'Public Lighting' or 'Street Lighting', in 18mm black lettering repeated at 1000mm intervals. Ducts shall be laid with the legend facing upwards. 2. The duct shall withstand a 750 Newton load rating for 5% defiection. 3. Ducting shall be laid in fully coupled, unbroken lengths and shall be installed to achieve the minimum depths of armoured cable required by I.S. 10101 latest version, and local authority requirements. Typical depths for the cable are 750mm at road crossings, 450mm under footpaths, and 600mm under grass or other softer materials. 4. Ducting shall be laid in a straight line, close to the line of columns and shall contain a continuous, knot free, draw line of minimum 8kN. 5. Ducting shall be laid on a bed of sand and surrounded with sand. After compacting, the sand bed shall be a minimum of 50mm deep at the bottom of the duct, 25mm at either side of the duct, and 150mm above the duct. An electrical hazard warning tape shall be laid on top of the sand along the entire length of the ducting at approximately 300mm below flnished ground level. The tape shall be made of plastic, coloured yellow, with the legend 'Caution Electric Cable Below'. RECEIVED: 20/07/2026 Lighting Design Report and Speciflcation - 13 - The remainder of the trench shall be backfllled to ground level using material free of sharp stones, or stones greater in size then 50mm. Road crossing ducts shall be adequately protected by a cover of lean mix concrete and at a depth consistent with road construction requirements but shall not be less than 750mm deep. 6. Duct ends shall be protected from the ingress of rubble or any other material. All ducts shall be installed so that no undue stress is placed on cables when pulled. Ducts shall be aligned as straight as possible horizontally and vertically. Sweeps shall be as gradual as possible. Where ducts must be cut, it shall be with an appropriate tool, and cuts shall be such that they do not affect the sealing of joints. The duct shall be completely deburred before installation. 7. The interior of the duct shall be cleaned with an appropriate brush, in both directions, following installation. 8. Following installation, and prior to backfllling, the duct shall be tested by drawing a cylindrical mandrel through. The mandrel shall be 300mm long and have a diameter than is 10% smaller than the internal diameter of the duct, or 10mm smaller, whichever is smaller. 9. Immediately after cleaning and testing, each shall be fltted with a continuous draw rope of 10mm diameter, free of knots, and with a minimum 8kN breaking strength. A surplus of 2m of draw rope shall be left neatly coiled at each end of the duct. The ends of the draw rope shall be secured in a manner that prevents accidental withdrawal of the rope. The ends of the duct shall then be closed off with purpose made caps or bungs to prevent ingress of water or foreign material. 10. Flexible duct is not acceptable as a substitute to rigid duct and is only appropriate in the following instances: o When linking columns to rigid duct. o For runs less than 2m in length. o Where tight turns are required and there is insufficient space for cable access chambers. 11. Cable access chambers shall be provided at the following locations: o At the intersection of duct runs. o At the divergence of duct runs. o At both sides of road crossings. o At both ends of ducting under shared surfaces, with a single access chamber in front of each column. o At any location where bends are equal to, or greater than 90 degrees. o At any location where proprietary 'duct bends' cannot be used due to constricted space. RECEIVED: 20/07/2026 Lighting Design Report and Speciflcation - 14 - o At either side of any substantial change in installation, at either side of a bridge for example. o At substantial changes in height. 12. Prefabricated chambers of plastic, or similar material shall not be used. 13. Public lighting ducting cannot pass under private property. Appendix E Electrical Cable Specification All electrical cables shall comply with the requirements of I.S. 10101 latest version, and with local authority speciflcations. All cables to be installed in ducting shall be armoured. Cable loading will be derived by appropriate calculation methods by a competent designer but will have a minimum conductor size of 0.6mm2. Cable can be either: 2 core NYCY for single phase and 4 core NYCY for three phases. SWA cable shall not be used. Cable type and size will be detailed in Appendix A of this design report. Electrical cable speciflcations are to be as follows as a minimum: 1. Only armoured cable can be installed underground. 2. NYCY cable to DIN VDE 0276 - 603 (0.6 / 1kV). 3. Glands shall be used in accordance with manufacturer's instruction to provide an earth with when using NYCY. 4. Cable joints are not permitted. 5. Only one cable incoming, and one cable outgoing shall be used, maximum of two, shall be installed in a column. This means that a supply circuit cannot normally be split to provide a spur, except in limited circumstances as designed by a competent person. 6. The bending radius of the cable shall never be less than the manufacturer's specifled limit. The minimum bending radius is normally 8 x total diameter of the cable. 7. Underground cables shall be protected for the entire run by ducting, column foundation sleeves and cable access chambers. No section of cable shall be in contact with the soil or ground. RECEIVED: 20/07/2026