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ISO 14118:2017

Safety of machinery — Prevention of unexpected start-up

Dec 8, 2017

General information

90.60     Mar 5, 2023


ISO/TC 199

International Standard


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ISO 14118:2017 specifies requirements for designed-in means aimed at preventing unexpected machine start-up (see 3.2) to allow safe human interventions in danger zones (see Annex A).
ISO 14118:2017 applies to unexpected start-up from all types of energy source, i.e.:
- power supply, e.g. electrical, hydraulic, pneumatic;
- stored energy due to, e.g. gravity, compressed springs;
- external influences, e.g. from wind.
ISO 14118:2017 does not specify performance levels or safety integrity levels for safety-related parts of control systems. While available means to prevent unexpected start-up are identified, this document does not specify the means for the prevention of unexpected machine start-up for specific machines.
NOTE A type-C standard can define the required means for the prevention of harm arising from unexpected start-up. Otherwise, the requirements for a specific machine need to be determined by risk assessment outside the scope of this document.

Life cycle


ISO 14118:2000


ISO 14118:2017
90.60 Close of review
Mar 5, 2023

National adoptions

Safety of machinery - Prevention of unexpected start-up (ISO 14118:2017)

60.60 Standard published

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