Demand factors

Yes. The Client can. After all, these are facility-dependent things.

any idea what should be the normally used values.?

If you are the client what values will you provide normally..?

Here is all about demand factor calculation

I once had a demand for 5 lighting centers to be built. I also had a demand for a couple of MCC's once. Never had a demand for a power control center, but I think I had a demand some kind of a switch to be built for a train, and it used power.

Now I am not trying to be a smart A$$ but I hope you can see my point. Without-very good communication in the questions you ask, anything can be read into the question. If English is not your 1st language then try to get someone to help you ask the question so we can help you.

Sorry ,

I asked for the demand factors normally used to calculate the maximum demand from the connected load. Will you please provide what are the commonly used"values"for demand factors..?

I hope you understood what i am asking.

AP1,

Demand Factors are a valid way to safely estimate or approximate the real-world connected load, when a large number of examples have shown the ratio between the total connected load and the actual demand load. In the USA, the National Electrical Code allows their use for residential occupancies to calculate feeder and service sizes, because of the very large base of existing homes/apartments that have been wired safely.

However, when you look at industrial facilities, there is entirely too much variation from one panel to another and from one plant to another. If every motor or heater is likely to be turned on at the same time then your demand factor cannot be less than 100%. Instead, you would want to look and see if any of the loads are non-coincident (cannot be used at the same time). That is a separate issue that the code also addresses (allowing the lesser of two non-coincident loads to be deleted from the calculations).

Sorry, my short answer is that demand factors cannot be given in advance for an industrial facility. Stay safe and plan at 100%.

--JMM