advidana- it is interesting to know that ducts getting crushed, could you please provide more details like no. of ducts, size of cable runs, configuration etc.
because of various connection of tubing etc the area certainly do not remain safa or unclassified , once the analyser is installed. for all switching operations the solinoid valves in general are intrincally safe but other parts have to be certified safe for hazardas area. the room can be...
would it not be advisable to size the cable on full load current and then check if voltage drop at starting current do not cause a voltage drop at motor end such that it is less than 80% or so. starting is a transient phenomenon and short can very well be met with the short time rating of the...