OK guys, I need ideas on how to provide a safe & NEC compliant installation for the following:
Customer makes water faucets and has several test stands that are actually sinks with electro/pneumatic actuators that hook up to the knobs and levers on faucets. The solenoids are 24VDC and the motors are 90-100VDC. Everything is within sight of the main control panel, about 10 ft. away. There is a main disconnect on the panel and separate fuse blocks inside for the individual motors, etc.
Water will be flowing out of the faucets into the sinks while the actuators are moving and energized. Cords from a wireway connect to the test stand to feed power to these units. Each of these cords has a female cord cap on it to connect to the test stand.
What really concerns me is that the 90-100VDC cords from the wireway are long enough to fall into the sink when they are disconnected. Due to the test stand design, the cords cannot be shortened. The area is only accessible to qualified personnel. Shutting off the main disconnect to connect or disconnect one cord is not feasible because it will interrupt testing on other units. I?m thinking separate disconnects will need to be added and the customer should provide employees with a written procedure for working on this equipment. What else????????
Thanks in advance for your ideas.
Customer makes water faucets and has several test stands that are actually sinks with electro/pneumatic actuators that hook up to the knobs and levers on faucets. The solenoids are 24VDC and the motors are 90-100VDC. Everything is within sight of the main control panel, about 10 ft. away. There is a main disconnect on the panel and separate fuse blocks inside for the individual motors, etc.
Water will be flowing out of the faucets into the sinks while the actuators are moving and energized. Cords from a wireway connect to the test stand to feed power to these units. Each of these cords has a female cord cap on it to connect to the test stand.
What really concerns me is that the 90-100VDC cords from the wireway are long enough to fall into the sink when they are disconnected. Due to the test stand design, the cords cannot be shortened. The area is only accessible to qualified personnel. Shutting off the main disconnect to connect or disconnect one cord is not feasible because it will interrupt testing on other units. I?m thinking separate disconnects will need to be added and the customer should provide employees with a written procedure for working on this equipment. What else????????
Thanks in advance for your ideas.
