All parts of the overhead electrical system (such as contact wires, catenary wires and traction return system) must be considered as electrified. Coming too close, there is a chance of getting an electric shock. The area where you must consider risk of electrocution is called “danger zone – ER”.
The “danger zone – ER” is the area within a radius of 1.5 meters around the live parts of the electrical system. When working within the “danger zone – ER”, the section of the electrical system must be isolated.

The overhead electrical system is always live, UNLESS you have been told otherwise by safety personnel. You must always be at a minimum of 1.5 meters distance from the electrical system when it is “live”.

You should also pay attention when working with ladders or tall objects. You enter the “danger zone – ER” unknowingly easier than you think.