EN ISO 14120: design and construction of fixed and movable guards

Last edit: 03/03/2023

The EN ISO 14120 Standard, published in October 2015, replaces the European standard EN 953:1997+A1:2009. 
This is a technical standard of type-B regarding guards. 
Its purpose is to specify the general principles for design, construction and selection of guards provided to protect people from mechanical hazards.
Guards determine a risk reduction both thanks to the protection against unexpected accesses and against the ejection of parts of substances. Guards could also provide protection against other hazards such as noise, fire and radiation.
The Standard applies to guards for machinery. 

Distance guard: guard which does not completely enclose a hazard zone, but which prevents or reduces access by virtue of its dimensions and its distance from the hazard zone.

Movable guard: guard which can be opened without the use of tools. 
Self-closing guard: movable guard operated by a machine element or by the workpiece or a part of the machining jig, so that it allows the workpiece to pass and the automatically returns to the closed position as soon as the workpiece has vacated the opening through which it has been allowed to pass.
Interlocked guard: guard associated with an interlocking device. 
Interlocked guard with guard locking: guard associated with an interlocking device and a guard locking device.

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