Hello everyone who has posted responses to my question. I have subsequently washed my hands of this project. Reason being, the other mechanic who started this project told me to drop the issue of designing with "fail safe" considerations, and told me to drop the issue of liability...
Richard Neff,thanks for your response. We are not going to be allowed to use a PLC. We have several AB PLC's at work so I have knowledge of these, and suggested that we use one. But my employer is very cheap and insisted on relays. And what we have in stock. I have my hands tied. We have the...
spector, I am taking your recommendation to heart. I have tried to convince my supervisor that this is risky, and he continues to blow me off, as if I don't want the responsibilty. They don't or won't understand the principal of "fail safe" design. I will take a copy of your...
Thanks for the advice everyone. Had not considered liability consequences. And jraef, thanks for clarifying the meaning of NRTL and the importance it has in protecting myself from a catastraphe someday. To spector I am afraid it is being made for installation, and the enclosure and din bar...
I am just starting out in my on-hands electrical training and have been handed a challenge project. I am to layout a ladder diagram for an alarm panel for our plant. It will involve one central located panel which will be able to monitor nine different fault possibilities throughout the plant...
