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

Clean Earthing Examples of clean earthing are the DC earthing, usually 24VDC, that reference the PLC, DCS or metering/control system in the gate station or plant. Frequently, control systems engineers from the major SCADA vendors recommend isolatin

Dirty Earthing Dirty earthing inside the facility are typically those 120VAC, 220VAC, 480VAC power earthing that are associated with high current level switching such as Motor Control Centers (MCC), lighting, power distribution, and/or earthing corr

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