Question 1

Do I need a lightning protection system for my plant?

Accepted Answer

IEC 62305-2 answers this with a number: if the calculated risk R exceeds the tolerable risk RT (10â»âµ/year for loss of human life), protection is required. Run the free calculator or request a risk assessment â the result tells you the required LPL class, not just yes/no.

Question 2

ESE arrester or Franklin rod â which should I specify?

Accepted Answer

Franklin/mesh systems designed to IEC 62305-3 geometry are accepted by every standard and auditor. ESE devices are designed to NF C 17-102 and claim larger coverage per terminal; that claim is not recognised by IEC 62305. For code-driven industrial projects we recommend conventional air termination; we supply both and state the basis either way.

Question 3

Copper-bonded or GI conductor for a coastal site?

Accepted Answer

Coastal C4âC5 corrosivity (ISO 9223) attacks zinc coatings fast. Copper-bonded steel (254 Âµm min copper) or solid copper lasts the design life; GI needs thicker coating and inspection every year. Our conductor range lists coating thickness per SKU.

Question 4

How often should an LPS be inspected?

Accepted Answer

IEC 62305-3 Table E.2: visual inspection every 1â2 years and complete testing every 2â4 years depending on LPL, plus after any strike or structural change. Hazardous areas (OISD 180) inspect annually. We offer periodic testing contracts with dated reports.

Question 5

What is separation distance and why does it matter?

Accepted Answer

The minimum air gap between the LPS and internal metal/electrical systems so the strike cannot side-flash into them, calculated per IEC 62305-3 clause 6.3. When the gap can't be kept, insulated (HVI-type) down conductors or bonding are the fixes â our design service calculates s for every roof object.

Question 6

Does an LPS remove the need for SPDs?

Accepted Answer

No. The LPS handles the direct strike; induced and conducted surges still enter on power and data lines. IEC 62305-4 coordinates both through lightning protection zones â which is why LPES quotes LPS and SPD as one system.

Lightning Protection Systems — Design, Manufacture, Install

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