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What RCD rating should you use?

The RCD rating you should use depends on the requirements of the circuit you are protecting. For general purpose circuits in homes, a 30mA RCD is commonly recommended. In certain specific situations or for specific equipment, a higher or lower rating may be appropriate. Consulting with a qualified electrician for advice tailored to your specific needs is recommended.


Will a rcd detect live to neutral fault?

No, a Residual Current Device (RCD) will not detect a live-to-neutral fault because this type of fault does not result in a current imbalance that the RCD can detect. An RCD is designed to detect imbalances between the live and return current in a circuit, such as those caused by a leakage current to ground.


What difference in current amperage makes an RCD trip?

RCD stands - Residual Current Device. Normally It measures current on phase & neutral and if there is any change or difference (Should be Phase I - Neutral I = Zero) even 30mAmps RCD trips to break the circuit to avaoid any damages to equipments as well as human beings. Its same as ELECB / RCCB.


Does RCD works on DC system?

No, Residual Current Devices (RCDs) are designed to work on AC systems only. They are used to protect against electric shock by monitoring the current balance between the live and neutral conductors. In a DC system, different protection measures are necessary since the current flows continuously in one direction.


How will a 3 phase rcd work with no neutral?

a traditional rcd wont work as it uses the difference between the incoming active and neutral to detect current loss it has to read 0. In particular, an RCD alone will not detect overload conditions, phase to neutral short circuits or phase to short circuits. Over-current protection must be provided.