Yes, there are residual-current devices (RCDs) that do not require a neutral wire. These types of RCDs are known as two-wire RCDs or two-pole RCDs. They work by comparing the current flowing through the live wire with the current returning through the earth wire. If there is an imbalance, indicating a leakage of current, the RCD will trip and disconnect the circuit. These two-wire RCDs are commonly used in older electrical installations where a neutral wire may not be present. **

No, a residual-current device (RCD) requires a neutral wire to function properly. The neutral wire is essential for the RCD to detect any imbalance in the electrical current and trip the circuit if there is a leakage of current. Without a neutral wire, the RCD would not be able to provide the necessary protection against electric shocks and potential electrical hazards. **

To connect a residual-current device (RCD) without a neutral wire, you will need to use a two-pole RCD that does not require a neutral connection. This type of RCD can be connected between the live wire and the earth wire in the circuit. Make sure to follow the manufacturer's instructions carefully and consult with a qualified electrician if you are unsure about the installation process. It is important to ensure that the RCD is properly installed to provide the necessary protection against electrical faults. **

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