IEC 62305 Risk Assessment β’ Rolling Sphere β’ Mesh β’ Protective Angle β’ BOQ β’ Tender Planning
Lightning Protection Design β’ Risk Assessment β’ Technical BOQ β’ Air-Termination System β’ Down Conductors β’ Earthing β’ Equipotential Bonding β’ Surge Protection β’ Drawings & Technical Support
Enter the project geometry and roof conditions first. The visual model and preliminary method view use the selected design criteria. Final design criteria remain subject to the IEC 62305-2 risk assessment, complete project information and engineering review.
The risk-management step comes before finalizing the protection measures and LPS design. Building geometry/use are taken from the project inputs; complete the remaining risk information here. Until the required inputs are reviewed, the website shows a preliminary design estimate only.
Enter the missing details in this section. After submission the project status changes to Ready for SN Engineering Risk Review.
Use the same building to compare Rolling Sphere, Mesh and Protective Angle arrangements. The visual, preliminary quantities and explanations change together. Applicability depends on the structure geometry, selected LPS class and the applicable IEC / IS / NBC design criteria.
Whole-building strike-point and protected-volume evaluation.
Roof conductor network using the selected LPS mesh reference. Mesh intersections are not automatic rod locations.
Local air-terminal protection where geometry and applicable height limits permit.
| Comparison | Rolling Sphere | Mesh | Protective Angle |
|---|---|---|---|
| Primary design concept | Checks exposed strike points around 3D geometry | Roof conductor network | Protective zone around an air terminal |
| Complex roof / HVAC / PV | Strong fit | May need additional rods / detailed checks | Local use only where applicable |
| Simple flat roof | Applicable | Strong fit where mesh arrangement is selected | Can be suitable for local points |
| Vertical rods | Placed only where protected-volume design requires | Not automatically at mesh intersections | Method depends on selected rod geometry |
| Customer visibility | Very clear 3D protection concept | Very clear conductor layout | Easy for simple local geometry |
| Main limitation | Needs actual 3D geometry | Does not by itself solve all protrusion/clearance issues | Not suitable as a universal whole-building shortcut |
Even if no drawing is uploaded, the system provides preliminary planning quantities from the entered dimensions, building use, rooftop condition, selected LPS class and stated calculation assumptions. These quantities are for budgeting, tender preparation and initial project planning only.
| Applicable / Preferred System Item | Preliminary Estimated Quantity | Basis / Assumption |
|---|
Submit the current project inputs, selected method view, preliminary BOQ and risk-input status to Team SN Engineering for full & final design, verified quantities and technical confirmation.
Use the online tool for preliminary project calculation and tender estimation. For final risk analysis, verified LPS layout, BOQ confirmation, drawings, product/technical selection and execution support, contact Team SN Engineering.
Use AI to identify content gaps, prepare technical article/FAQ drafts, improve internal linking and flag outdated pages. Technical and standards-related updates should be reviewed before publication.
Click any box to open a separate full technical page. These pages explain the design role, scope, project inputs, calculations/limitations and how each standard connects to the Lightning Protection Design Studio.
Open products, applications, engineering resources, tenders, city/state/district pages, calculators and technical content.
OPEN KNOWLEDGE CENTRE βUse these focused guides for price, specification, application, BOQ and quotation requirements. Final engineering and selection are based on project/site data.
For quotation: send BOQ/specification, site location, quantity/capacity and application details to SN Engineering.
| Stage | Deliverable to define in the consultancy scope |
|---|---|
| Design basis | Project specification, soil data, equipment schedule, fault/protection inputs and agreed acceptance criteria. |
| Earthing design | Proposed earth-grid/electrode arrangement, conductor and connection schedule, bonding interfaces and test access. |
| Lightning protection design | Risk/design basis, selected air-termination method, roof layout, down-conductor routing, bonding and earth-termination coordination. |
| BOQ and submittals | Material quantities, model datasheets, required evidence, drawings, deviations and clear installation exclusions. |
| Construction coordination | Drawing revisions, supports, civil-work interfaces, sequencing, inspection hold points and access arrangements. |
| Testing and handover | Agreed test methods, instrument records, measured results, defect closure, as-built drawings and maintenance schedule. |
Confirm which calculations, drawings, site visits and revisions are included. A preliminary estimate or product recommendation is not an approved final design.
For PWD, MES, Air Force project contractors, railway and construction EPC teams, send the tender specification and roof/electrical drawings. Terminal selection must follow the accepted system approach and complete design requirements.
Government project documentation and UL verification Β· MES project consultation Β· Air Force infrastructure enquiries
SN Engineering reviews lightning protection enquiries for Delhi, Gurugram/Gurgaon, Noida, Greater Noida, Ghaziabad, Faridabad and Manesar from its Gurgaon contact office. Use the design tool above for preliminary project planning, then submit drawings and specifications for an engineering and commercial review.
A lightning risk assessment needs the structure's dimensions, location, use, occupancy, incoming services and consequences of damage. Confirm the required standard edition and customer specification before selecting a protection approach. The IEC 62305 series separates general principles, risk management, physical protection of structures and protection of electrical/electronic systems.
A conventional proposal should state the chosen air-termination method, protection level/design basis, down-conductor arrangement, earth termination, bonding and the protection of incoming services. Rolling-sphere, mesh and protective-angle methods have method-specific applicability; a preliminary visualisation is not a substitute for a reviewed project drawing.
An ESE proposal should identify the model, declared ΞT, installation height, test documents and applicable ESE-specific requirements. Confirm customer acceptance and distinguish the ESE design basis from a conventional IEC 62305 proposal. Review the ESE selection and price checklist.
| Component | Selection and quotation details |
|---|---|
| Air-termination system | Conventional terminals, mesh or masts, or a specified ESE model where accepted by the project. Identify the design method, mounting arrangement and protected-zone drawing. |
| Down conductors and fittings | Specify conductor material and dimensions, measured routes, supports, compatible connectors, guards and accessible test joints. |
| Earth termination and bonding | Define electrodes or ring/grid arrangement, connections, inspection points, material compatibility and the relationship to the existing earthing system. |
| Surge protection | Identify the power and signal services requiring protection, SPD selection and coordination, installation locations and connection details. |
| Inspection and handover | State inspection scope, continuity and earth-testing records, equipment/calibration identification, as-built drawings and maintenance instructions. |
Installation quotations should identify roof access, mounting supports, measured conductor routes, test joints, earth termination, bonding and any civil work. Agree inspections before concealed work is covered. Testing and handover should record the installed configuration, continuity and earth measurements, test-point identifiers and instrument details. Define maintenance inspections and checks after modifications or a suspected lightning event in the handover plan.
Testing and commissioning Β· Maintenance guide
Separate air terminals, masts/supports, conductors, connectors, earth termination, bonding, SPDs, access equipment, installation, testing and documentation. State materials and measurable quantities against drawings. Confirm taxes, freight, civil work and installation responsibilities in the written quotation. Building area alone does not define the installed system price.
BOQ preparation guide Β· Lightning arrester buyer guide
Request the datasheet for the exact model offered, relevant test documents and a drawing showing the design basis. A test report for a different model, or a general company certificate, does not establish the performance of the proposed item.
For installation handover, agree dated site photographs linked to drawing references, conductor and bonding inspection records, test-point identifiers, the measurement method and instrument details, and as-built drawings. A preliminary design assessment is different from a signed record of completed installation and measured site results.
Selection requires the building dimensions, roof levels, equipment projections, design basis and protected-zone drawing. There is no universal coverage radius suitable for every project.
Compare the exact air-terminal model, mast/support arrangement, conductor material and quantity, earthing and bonding scope, SPDs, access equipment, installation, testing, taxes and freight. Request a written itemised quotation; model-only prices do not describe a complete installed system.
Confirm the edition and requirements named in the project specification. The IEC 62305 series addresses lightning protection and risk management; an ESE proposal should separately identify its ESE-specific design and test basis and the customer's acceptance requirements.
Review the project-specified edition and acceptance requirements. Official references: IEC 62305-2:2024 β risk management; IEC 62305-3:2024 β physical protection of structures; IEC 62305-4:2024 β electrical and electronic systems.
Send the site location, roof plan/elevations, electrical single-line diagram, project specification, photographs and required supply/installation/testing scope. SN Engineering's contact office is DSS F-5, 1st Floor, Sector 10, Gurgaon, Haryana 122001. Project feasibility, visit arrangements, availability and schedule are confirmed during enquiry review.
A terminal-only price cannot be compared directly with an installed system quotation. Request the same project scope from each supplier and ask for these costs separately.
| Quotation line | Information needed |
|---|---|
| Design and terminal selection | Building dimensions, roof plan, risk/design basis and accepted system approach. |
| System materials | Air terminals, supports, conductors, connections, bonding, earth termination and specified surge protection. |
| Installation and access | Roof access, work-at-height arrangements, conductor routes, civil work and exclusions. |
| Testing and handover | Inspection scope, measured results, as-built drawings and maintenance requirements. |
SN Engineering can review project enquiries for Delhi NCR and India. Price, service availability and execution schedule require confirmation against the supplied drawings and scope.
Prepare the earth-termination RFQ Β· Compare ESE model requirements