Does anyone know what the NEC clearance has to be from a cable tray containing #8's for power and an energized piece of equipment (A/C condenser & pump within metal enclosure)? Currently the tray is about 4' above the condenser.
I would like to place a mushroom emergency stop button on a stantion, necessarily away from the process equipment. To depict on a P&ID, can I have a double headed arrow on/off the page connected with dashed line to a YS dcs bubble connected to a HS local bubble? This would be shown as...
Has anyone placed emergency stop buttons (with signal back to dcs)on their P&ID's for motor control, next to an HOA? Would you use something for the symbol identification like XSC for a user defined control switch?
