Ground and fire wire resistance is 6.5 kilo-ohms is not normal, because according to the national electrical installation standards, ground and fire wire resistance should be 10 ohms or less, to ensure the safety of electricity.
Firewire is relative to the zero line, general household electricity will only use three-phase electricity, one of the phase, his line voltage is 220 volts, it is through the zero line to form a circuit to make household appliances work; ground wire, not for the work of the circuit, but only as a protective line. The use of the earth's absolute "0" voltage, when the equipment shell leakage, the current will quickly flow into the earth.