Operation Manual / 2 Safety / A130 - A1551 Safety Page 4 / 19© Copyright 2017 ABB. All rights reserved. HZTL4022_EN Revision D January 20171.3 Definition of mandatory signsTo be worn at all timesProtective clothing Safety footwear to protect againstmechanical hazard and risk of fall-ingTable 1: Personal protective equipment to be worn at all timesTo be worn specific to the respective taskSafety glasses Safety gogglesSafety gloves to protect against- Mechanical hazard- Chemical hazard- Thermal hazardRespiratory mask to protect against- Dusts- GasesSafety helmet Ear protectionTable 2: Personal protective equipment to be worn specific to the respective task1.4 Definition of safety instructionsWARNINGDefinition of WarningNon-compliance or inaccurate compliance with working or operating instruc-tions indicated by this symbol and the word WARNING can lead to seriousinjuries to personnel and even to fatal accidents. Warning signs must always be observed.CAUTIONDefinition of CautionNon-compliance or inaccurate compliance with working or operating instruc-tions indicated by this symbol and the word CAUTION can lead to seriousdamage to engine or property with grave consequences. Caution signs must always be observed.