5.9Installing the residual current device#

The RCD must be installed upstream of the equipment or part of the circuit it is required to protect and downstream of any MEN point. Because the RCD is detecting imbalance in the phase and neutral currents, upstream of the MEN, the neutral is carrying both the neutral and the earth currents and so the RCD is not likely to function in the manner for which it was designed.

The manufacturer’s instructions must be followed when installing the RCD.