Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) - Part 3: Electrical safety requirements

IEC 63044-3:2017+A1:2021 specifies the electrical safety requirements for HBES/BACS. In addition, it defines safety requirements for the interface of equipment intended to be connected to an HBES/BACS. It does not apply to interfaces to other networks. This document covers the following requirements and compliance criteria : protection against hazards from the device, protection against overvoltages on the network, protection against touch current, protection against hazards caused by different types of network, protection of the communication wiring against overheating caused by excessive current.