Tolerable Risk – IEC 62305-2
In performing risk assessment as an essential step in the application of IEC 62305, the calculated risk of loss due to lightning shall be below the tolerable level.
Tolerable risk (RT) as defined in IEC 62305-2 is
- tolerable risk RT
- maximum value of the risk which can be tolerated for the structure to be protected
- Also referred to...
IEC 62305 – Risk Assessment Process
Risk assessment is a essential step in the application of IEC 62305. Risk assessment is required to determine the need and extent of protection measures to reduce the risk of loss due to lightning below an acceptable level.
The values assigned for certain parameters are values proposed by the IEC 62305. It is recognized by IEC that these identified values...
Solar Power Questions Answered
Human activities have been a major factor to the greenhouse gas (GHG) emissions. GHG emissions increased significantly since before the advent of the Industrial Revolution. GHG emissions contribute to the global warming and changing climate patterns. Global actions need to be taken to reduce GHG emissions.
The United Nations Framework Convention on Climate Change (
Lightning Strike Damage and Losses – IEC 62305
IEC 62305 identifies four main sources of damage:
- S1 Flashes to the structure
- mechanical damage, fire and/or explosion due to the hot lightning plasma arc, over-heated conductors or melted metal;
- fire and/or explosion triggered by sparks;
- injury to living beings by electric shock;
- failure or malfunction of internal systems due to Lightning Electromagnetic Pulse (LEMP).
- S2 Flashes near to the structure
- failure or malfunction of internal...
Steel Structure used as Lightning Protection System (LPS)
The design of a Lightning Protection System (LPS) should be technically and economically optimized.
Clause 4.2 Design of the LPS in IEC 62305-3 - Protection against lightning Part 3: Physical damage to structures and life hazard states that design optimization could be achieved if design and construction of the LPS are coordinated with the design and construction of the structure...
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Design Guides
This design guide is intended provide typical electrical installation scenarios with each scenario to include compliance to standards. As their are many ways of complying with standards,this design guide is prepared to suit the minimum standards requirements.
While design principles equally applies to larger and more projects, this design guide will not attempt to address the design needs of those installations.
Philippine Electrical Code
A Design Guide according to the Philippines Electrical Code is available at Filipino Engineer Wiki