Bad Design.

Question

This emergency stop button appears to indicate that the red button must be rotated clockwise to operate it to the OFF position. Should it not be marked PUSH, so that anyone knows what to do to operate it in an emergency? 
 
 Z.

gkenyon · Accepted Answer

Zoomup said: Should it not be marked PUSH, 
 No,not according to the standard BS EN 60947-5-5. It only needs to be a red button, yellow background, with direction of unlatching marked. 
 However, on installation it should be accompanied by this sign, according to the Health & Safety (Signs and Signals) Regulations, to tell people how, when to operate it in an emergency, and/or what it stops, along with appropriate text indicating how to achieve the safe state as necessary: https://www.iso.org/obp/ui#iso:grs:7010:E020 
 
 Note that, under the old BS 5499-5, which was withdrawn in 2011, the sign had a red background. Under BS EN ISO 7010 that replaces it, the sign has a green background, aligning with the concept of 'green indicates the safe way or safety/emergency procedure' like emergency exits, first aid signs, assembly points and RVPs, etc,

Bad Design.

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