If you mean the maximum occupancy of a room, then several things are considered. The square footage of the room, the room's purpose, and the number of emergency exits that exist are factored in.
Is this a commercial Pool?If yes then what state is the pool located in? Different states, different codes.Some methods are: based on water volume, surface area, flow rate. Some have a combination of...
Depends on several factors, but mainly the net floor area, whether there are more than 50 people allowed inside, and the net width of the exits. You divide the net floor area by the feet-per-person...
Generally, devices designed for use on an AC circuit cannot be supplied from a DC supply. The reason is that whereas DC loads are simple resistances, so current is calculated by volts divided by...
By adding together the power ratings, and applying a diversity factor. A 'diversity factor' takes into account that not all loads will be operating at the same time.