The requirements for Type B RCD use in Heat Pump installationsChaz Andrews, Technical Manager at Doepke UK, looks into the requirements for Type B RCD use in Heat Pump installations, following Amendment 3 to BS 7671. Heat Pumps (HP) producing leakage currents above 1 kHz, will not be compatible with Type B RCDs that are only manufactured to meet the lowest requirement of BS EN ...The post The requirements for Type B RCD use in Heat Pump installations appeared first on Professional Electrician.