In Europe, the protection of workers from electrical hazards, including arc flash, is regulated by a number of laws and standards. These regulations vary by country, but generally, employers are required to assess the risks of electrical hazards in the workplace and take appropriate measures to protect workers.

One of the key European standards for the protection of workers from electrical hazards is EN 61439-1:2011, which is a standard for low-voltage switchgear and control gear assemblies. This standard covers the design and construction of electrical switchgear and control gear, as well as the necessary safety measures to protect workers from electrical hazards.

In addition to EN 61439-1:2011, there are several other European standards that address the protection of workers from electrical hazards, including:

1. EN 50110-1:2007: This standard covers the safety of electrical installations in overhead power lines with a nominal voltage above 1 kV.
2. EN 50110-2:2007: This standard covers the safety of electrical installations in overhead power lines with a nominal voltage of 1 kV or less.
3. EN 50238:2012: This standard covers the safety of electrical installations in areas with a risk of explosion.
4. EN 50254:2006: This standard covers the safety of electrical installations in hazardous areas.

In addition to these standards, there are also several European Directives that address the protection of workers from electrical hazards. These include:

1. The Low Voltage Directive (LVD): This Directive applies to all electrical equipment designed for use with a voltage rating between 50 and 1,000 volts for alternating current and between 75 and 1,500 volts for direct current. It requires that such equipment be designed and constructed in a way that ensures the safety of workers.
2. The Electromagnetic Compatibility Directive (EMCD): This Directive applies to all electrical and electronic equipment designed for use within the European Union. It requires that such equipment be designed and constructed in a way that ensures it does not cause harmful interference with other equipment.
3. The ATEX Directive: This Directive applies to equipment and protective systems intended for use in potentially explosive atmospheres. It requires that such equipment and systems be designed and constructed in a way that ensures the safety of workers in these environments.

In addition to these regulations, employers in Europe are also required to provide appropriate personal protective equipment (PPE) to protect workers from electrical hazards, including arc flash. This may include items such as arc flash suits, helmets, gloves, and face and eye protection. Employers are also required to provide training to workers on the proper use and care of PPE, as well as the risks associated with electrical hazards and the measures that should be taken to protect against them.

Overall, Europe has a robust regulatory framework in place to protect workers from electrical hazards, including arc flash. Employers are required to assess the risks of electrical hazards in the workplace and take appropriate measures to protect workers, including providing appropriate PPE and training. These measures help to ensure the safety of workers and prevent serious injuries or fatalities from electrical accidents.