Why Singapore takes lightning seriously
Singapore sits in the lightning belt of South-East Asia. Tropical convective storms drive ground-flash densities of around 15 strikes per square kilometre per year — among the highest measured anywhere. Combined with dense urban infrastructure, sensitive electronics, fuel storage, telecoms and people on rooftops, the case for engineered lightning protection is settled. The only questions are: what level of protection, and does the design actually deliver it?
Lightning Protection Systems (LPS) in Singapore are governed by SS 555 — the Singapore Standard for Protection Against Lightning — which is closely aligned with the international standard IEC 62305. Both require a structured risk assessment and an LPS designed to a defined Lightning Protection Level (LPL I, II, III or IV).
What our lightning protection service covers
- Lightning risk assessment per IEC 62305-2 — quantifying risks R1 (loss of human life), R2 (loss of service), R3 (loss of cultural heritage), R4 (economic loss).
- External LPS design — air termination network (rolling sphere, mesh or protective angle method), down conductors, earth termination network.
- Internal LPS design — equipotential bonding, separation distances, Surge Protective Devices (SPDs) coordinated across LPZs.
- Earthing system design — soil resistivity testing, electrode configuration, Type A or Type B arrangements.
- SPD coordination — Type 1 at service entrance, Type 2 at sub-distribution, Type 3 at sensitive equipment.
- Testing and inspection — earth resistance, continuity, visual inspection per maintenance interval.
- PE endorsement for submission to authorities (BCA, SCDF where applicable).
Process
- Site & building data. Building dimensions, occupancy, services entering the building, location, surrounding structures, soil type.
- Risk assessment (IEC 62305-2). Calculate exposure factor, identify tolerable risk levels, derive required Lightning Protection Level.
- External LPS design. Position air terminals using the rolling sphere method, route down conductors at the calculated spacing, design the earth termination.
- Internal LPS design. Determine separation distances, specify equipotential bonding bars, design SPD coordination scheme.
- Drawings & calculations. Plan view, elevation, section, single-line of SPDs, earthing diagram, risk assessment report.
- PE endorsement. Apply stamp and signature; deliver submission package to client.
- Installation oversight (optional). Site inspection during installation, witness of earth resistance testing.
- Final verification. Post-installation inspection, completion certificate.
A sample of past projects
- Kallang Football Stadium — open-roof stadium with elevated lighting masts.
- Seletar Satellite Earth Station Antenna — high-value RF infrastructure.
- Rail Test Centre (SRTC) for LTA GS 190.
- LTA pedestrian overhead bridges, covered linkways and bus shelters.
- Jurong Island Desalination Plant.
- Geylang Seri Gateway — Changi Road, Geylang Road and Joo Chiat Road precinct.
- Bean Sprouts Farm — Sungei Tengah Road agricultural facility.
- Yusof Ishak Secondary School — Sumang Walk.
- 10+ landed property houses and event tentage installations.
Standards
- SS 555-1 to SS 555-4 — Singapore Standard for Protection Against Lightning (general, risk management, physical damage, electrical and electronic systems).
- IEC 62305-1 to -4 — international equivalent.
- SS 551 — Earthing.
- IEC 61643 — Low-voltage surge protective devices.
Frequently asked questions
Is lightning protection mandatory for every building in Singapore?
Not every building is required by statute to have an LPS — but BCA, SCDF and EMA approvals frequently require risk-assessed protection for any structure of meaningful occupancy, fuel storage, electronic infrastructure or critical service. The right answer comes from the risk assessment, not from an assumption.
What about ESE (Early Streamer Emission) air terminals?
SS 555 and IEC 62305 are conventional standards (Franklin rod / rolling sphere / mesh). ESE terminals are covered by separate (and controversial) regional standards. Our designs follow the SS 555 / IEC 62305 approach; we don't endorse ESE-only designs.
How often should an LPS be inspected?
SS 555 recommends visual inspection at least annually and full inspection/test every 1 to 4 years depending on LPL and environment. We can run the inspection cycle on an annual maintenance basis.
Can you handle a one-off event tentage LPS?
Yes — we've designed and endorsed lightning protection for more than ten temporary tentage installations for events. Risk assessment and design are scaled to the temporary nature of the structure.