What is the difference between earthing and grounding?
Earthing is used in European electrical installation standards (IEC), Grounding is used in US electrical installation standards (NEC, UL). But both are describing the same idea. By definition both are same but the usage is different. An earthing system or grounding system (US) is defined as an arrangement of connections and devices necessary to earth equipment or a system separately or jointly for providing protection against voltage surges and shock accidents.