NEN EN 50274 : 2002 + C1 2009

Introduction
1. Scope
2. Normative references
3. Definitions
4. Requirements
     4.1 General requirements
     4.2 Positioning of operating devices
     4.3 Measures
     4.4 Space of protection
     4.5 Base area
     4.6 Access area
     4.7 Equipment installed on movable parts
5. Tests
     5.1 Operating devices and access area
     5.2 Finger protected and back of the hand
          protected locations
Annex A (informative) Figures for explanation
Figure 1 - Permissible area for locating of operating
           devices
Figure 2 - Maximum and minimum height of the base area
           depending on the service position
Figure 3 - Operating space for pushbutton actuation
Figure 4 - Operating space for actuation by rotary means
Figure 5 - Example for operating space during activation
           by pushbutton

Applies to low-voltage switchgear and controlgear assemblies with rated operational voltage not exceeding 1000 V a.c. or 1500 V d.c.. Applies to the partial protection against direct contact in cases when the operating devices are positioned close to hazardous-live-parts and these operating devices are actuated by minimum skilled or instructed persons.