I've been looking for some formulas to help me calculate conductor sizing, derated values, ampacity and so on. For example, say I have an 800A distribution panel, and I have an 800A MCCB that could be used at 100% of it's rated value (800A plug), what would be the size of the conductor that I...
We have 3 large air unit bringing in fresh air from the outside and sort of act as an air exchanger for our manufacturing plant during the summer time. Now in the winter time, we do the same thing, but we try not to bring in as much fresh air (through dampers)in because of the large cost...
Hey all,
We have a 150A breaker feeding 2 sub panels at our plant. Those 2 sub panels are full and have a certain rating on them for capacity in amps and lug rating(which I don't have on hand right now, but is irrelevant to my question). What I would like to know, is how do you go about...
We are in the process of improving our electrical preventive maintenance schedule at work and with all the equipment that we have it makes it difficult to find the recommended maintenance for all the different types of motors. What I was wondering is if there was a chart or a web site that...
Hello all,
We have a lot of 3 phase induction motors at our facility and some people think they may save energy by turning on and off those motors 3-4 times an hour. For the past few weeks I have been trying to find some good information on how often a 3 phase induction motor can start and...
