Re: WA State Adminstrative exam
The simple answer is that it is all in Article 220, and that there are example problems in the back of the book. I think the real difficulty comes from there being so many ways to describe a problem, and that a seemingly simple or unimportant detail can significantly change the answer. The real skill in taking this type of test is in recognizing which information is important and how to use that information.
By way of an explanation of what I mean, you can get a multi-family dwelling problem for which half of the ranges are gas. That fact might seem minor, since you don?t have to include any electrical cooking load for the units with gas ranges. However, the fact that all units do not have electrical cooking prevents you from using the Optional Method for the building. See 220.32(A)(2). But there is an exception that might let you use the Optional Method. So you might have to calculate it two ways, before you find the ?right answer? for that problem.
You can use the example problems in the Annex to set up your own ?worksheet.? My best advice is to study the various demand factors (for the phase load and the neutral load), and to make sure you understand the tables (for example, the range table 220.19 is very complicated).
