Final answer:
High voltage equipment must be turned off at provided switches before maintenance or intervention to prevent electric shocks and ensure safety. Circuit breakers and fuses are designed to handle high current scenarios and GFIs prevent unintentional current paths.
Step-by-step explanation:
High voltage equipment should be turned off at provided switches prior to maintenance or any form of intervention to ensure safety. This is necessary to prevent shock hazards as high voltage can lead to dangerous electric shocks. Circuit breakers and fuses are designed to interrupt excessive currents and prevent hazards, but special measures such as insulating gas or jets of gas to blow out sparks are used to deal with the particular problems associated with interrupting high voltage currents. Additionally, devices like ground fault interrupters (GFIs) and isolation transformers provide additional safety by preventing unintended current paths and electric shocks. Always ensure that high voltage equipment is powered down correctly according to safety protocols to prevent accidents.