Can you size a residential service without guessing?

Most electrical training explains what a load calculation is. Almost none walks you through one from the first tape measure to the finished breaker. This handbook does, in plain language, one step at a time, with every number shown.

You start with volts, amperes, and volt-amperes, then build up through the five load groups that make up every dwelling calculation: general lighting, fixed appliances, the range, the dryer, and heating versus cooling. By Chapter 8 you are running complete standard-method calculations. By Chapter 14 you are working multifamily buildings and evaluating whether an existing service will carry a vehicle charger.

Written in second person for apprentices, trade students, licensing exam candidates, and working electricians who want the method to finally click.

Inside you will find:

Complete worked calculations, not fragments. Five full examples carried start to finish, including a gas house, an all-electric house by both permitted methods, a large home near a service boundary, an eight-unit building, and an addition to an existing service.
Over 200 figures, tables, and diagrams. Every demand factor illustrated, every worksheet shown filled in as well as blank.
Both calculation methods, side by side. Learn when the optional method gives you 25 amperes of headroom instead of 2 on the same house, with no change to the building.
Twenty practice problems per chapter with a full answer key. Every solution shows the arithmetic, not just the result.
Blank printable worksheets. Standard method, optional method, multifamily, and feeder calculations, ready to photocopy.
A quick reference card. Every demand rule in the book on a single page you can keep with your tools.
An audit checklist that catches real errors. Seven checks, plus the characteristic mistake each chapter warns about and the signature it leaves on a worksheet.

The book closes with the five principles behind every rule, so when a specific table value slips your mind, you still know the shape of the answer.

Stop guessing at service sizes. Start calculating them.

"About this title" may belong to another edition of this title.

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