danger isolation tag signage placing on locking out equipment permit only operation do not start or operate

alert and attention australia background beware building careful caution concept construction control controller danger dangerous design equipment exclamation exclusions factory first forbidden hazard health icon industrial industry isolated isolation label locking machine mark message not notice occupational only open operate operation out permit perth placing precaution pressure prevention product protection restriction risk safe safety security sign signage signs site start symbol tag technology this warn warning workplace zone