In workplaces where flammable, explosive or hazardous chemicals are present, sufficient warning and communication systems must be in place to warn the employees and relevant rescue and emergency services of an accident, injury or emergency situation.When necessary, monitoring equipment shall be installed for automatic and continuous recording of gas concentrations in specific places.When important in relation to safety or evacuation, the alarm systems must activate a fail-safe function in technical systems, for example devices to cut off power automatically from electrical installations and internal combustion engines.
