Question

High voltage installations require warning notices. List 3 locations where  a permanent, legible warning notices carrying the wording “Danger-High Voltage” should be located. substations, question from hydrocodes and standards

Answer 1

Danger signs must provide warning where a hazard or hazardous condition is
likely to be life-threatening.

So "Danger-High Voltage" signs should be placed where it is likely to get in contact with Voltage which is life-threatening.

So few of such places are:

1. "Danger – High Voltage" warning signs must be placed on all substation parameter fences.
2. Every Power transformer should be labeled with "Danger – High Voltage" sign.
3. Every fenced capacitor bank must be provided with "Danger – High Voltage" warning.
4. High voltage Switch gears are also should be labeled with "Danger – High Voltage" sign.