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Welcome to Module 13, which is about Panelboards and Switchboards. In Module 10, we discussed power distribution with a loadcenter. Loadcenters are used mostly in residential applications. Distributing power in commercial and industrial facilities is more complex than residential distribution. A typical industrial distribution system is shown in Figure 1. In additional to distribution devices such as switchgear, switchboards, transformers, and panelboards, such a system usually contains metering equipment, main and branch disconnects, protective devices, power switching devices, and conductors. We will look at switchboards and panelboards in detail in this module. These expandable devices are used to supply electric service in industrial applications.
Figure 1. Typical Components of a Commercial and/or Industrial Distribution System Like the other modules in this series, this one presents small, manageable sections of new material followed by a series of questions about that material. Study the material carefully, then answer the questions without referring back to what you’ve just read. You are the best judge of how well you grasp the material. Review the material as often as you think necessary. The most important thing is establishing a solid foundation to build on as you move from topic to topic and module to module. A Note on Font Styles Key points are in bold. Glossary items are italicized and underlined the first time they appear.
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