CharlieUK
Quite Involved in Discussions
Earth Bonding impedance and test current is completely unrelated to touch current
Earth bonding test current is typically the larger of 25 A or 2x rated current of the equipment.
The 0.1 / 0.2 ohm values have been in use for decades - I don't know where they originate, but a properly bonded connection should be < 0.02 ohm
Typically tested with a few volts dc.
Earth leakage current is the AC current that would flow in a specified test circuit (simplest one is a 2000 ohm resistor) that was placed between chassis and ground with the equipment ground disconnected. This is tested at rated mains voltage
Earth bonding test current is typically the larger of 25 A or 2x rated current of the equipment.
The 0.1 / 0.2 ohm values have been in use for decades - I don't know where they originate, but a properly bonded connection should be < 0.02 ohm
Typically tested with a few volts dc.
Earth leakage current is the AC current that would flow in a specified test circuit (simplest one is a 2000 ohm resistor) that was placed between chassis and ground with the equipment ground disconnected. This is tested at rated mains voltage
