Document RevisionsRevisions to the IALA Document are to be noted in the table prior to the issue of a revised document.Date Page / Section Revised Requirement for RevisionDecember 2005 Entire document Reformatted to reflect IALA documentation hi

Lightning is a high-frequency electrical phenomenon which causes overvoltages on all conductive items, especially on electrical cabling and equipment.Lightning strokes can affect the electrical (and/or electronic) systems of a building in two ways:

OPR lightning protection systemsExternal lightning protectionMain catalogABB OPR lightning protection systems | 1Lightning mechanism and location 2Lightning protection technologies 3Lightning protection risk analysis 8Lightning protection tec

TYPES OF EARTHING Any discussion on earthing invariably leads to a discussion on the different types of earthing and the corresponding definition of each. However, it is commonly accepted that earthing in the gas industry can be classified as either

TYPES OF EARTHING Any discussion on earthing invariably leads to a discussion on the different types of earthing and the corresponding definition of each. However, it is commonly accepted that earthing in the gas industry can be classified as either