High-voltage equipment operates at voltages typically above 1,000 volts AC or 1,500 volts DC. This category includes transformers, circuit breakers, switchgear, cables, and other critical components in power distribution and industrial settings. This Chapter details the requirements for protection of persons from ionising radiations emitted by high voltage (HV) equipment. Whether you're designing a residential circuit, managing an industrial facility, or planning a power transmission network, knowing the differences between low, medium, and. High voltage equipment is defined as any equipment that uses voltages greater than 600V or high amperage (>100 milliamps (mA)) of electrical power.