Signs positioned at the High Location Level are intended for all users within a building. Therefore, they shall be installed at a height above 1.8m. This way the presence of people or objects located between the equipment and the user does not obstruct the visibility of the signs.

Signs located at the Intermediate Location Level are intended for the user of the identified equipment. This signage contains complementary information advising the correct usage of the equipment or what actions are required and should therefore be installed at a height of between 1.2 and 1.8m.