This European Standard defines terms and specifies the general design characteristics of ladders. It applies to portable ladders designed for general professional and non-professional use. This standard does not apply to portable ladders which by their design and instructions are intended and limited only for a specific professional use and as a result are not for general professional or non-professional use." NOTE 1 For multiple hinge joint ladders EN 131–4 applies. NOTE 2 For telescopic ladders EN 131–6 applies. NOTE 3 For mobile ladders with platforms EN 131–7 applies. NOTE 4 This standard does not apply to step stools for which EN 14183 applies. NOTE 5 For ladders to work near high voltage installations, EN 61478 applies and for working near low voltage electric installations, EN 50528 applies.