BS EN 50122-1:2011+A4:2017

What is BS EN 50122-1 - Protective provisions against electric shock about?  

BS EN 50122 is a European standard that discusses electrical safety, earthing, and the return circuit of fixed installations for Railway applications. BS EN 50122-1 provides the best industry guidance on the protective provisions against electric shock to ensure the safety of workers. 

BS EN 50122-1 outlines requirements for the protective provisions relating to electrical safety in fixed installations associated with a.c. and/or d.c. traction systems and to any installations that can be endangered by the traction power supply system. 

BS EN 50122-1  applies to all aspects of fixed installations that are necessary to ensure electrical safety during maintenance work within electric traction systems. 

BS EN 50122-1 also applies to all new lines and all major revisions to existing lines for the following electric traction systems: 

• Railways 
• Guided mass transport systems such as tramways, elevated and underground railways, mountain railways, trolleybus systems, and magnetically levitated systems, which use a contact line system 
• Material transportation systems 

Note 1: BS EN 50122-1 does not apply to: 

• Mine traction systems in underground mines 
• Cranes, transportable platforms and similar transportation equipment on rails, temporary structures (e.g., Exhibition structures) in so far as these are not supplied directly or via transformers from the contact line system and are not endangered by the traction power supply system 
• Suspended cable cars 
• Funicular railways 

Note 2: BS EN 50122-1 does not specify working rules for maintenance. 

Who is BS EN 50122-1 - Protective provisions against electric shock for? 

BS EN 50122-1 on the protective provisions against electric shock  is useful for: 

• Personnel or technical staff authorized for electrical Fixed installations 
• Regulatory authorities 

Why should you use BS EN 50122-1 - Protective provisions against electric shock? 

Electrical safety is important because hazards such as arc flash and shock can result in death if you are exposed to them. Fortunately, the likelihood of this occurring is relatively low. However, the control measures that prevent these hazards require careful management, attention to detail, and technical competence. 

BS EN 50122-1 guideline assists you with the contact line zone and current collector zone, protective provisions against direct contact, protective provisions against indirect contact and impermissible rail potential, protective provisions for low voltage non-traction power supplies, protective provisions where track systems, which are utilized for carrying traction return current, protective provisions where contact line systems pass through hazardous zones, limits for touch voltage of rail potential, protection against the danger of rail potential for protective provisions against electric shock railway application. 

With compliance and obedience to BS EN 50122-1, you can adopt appropriate protective provisions against electric shock to ensure the safety of workers.