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Guide to the National Electrical Code by Thomas L. Harman

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Chapter 8Installation Rules for Distribution Equipment

Electrical circuits on a premises normally originate at a distribution center where the main overcurrent devices and other equipment are grouped together. A residential occupancy has only service-entrance equipment containing the disconnecting means and overcurrent devices. A large industrial complex may have several distribution centers as well as additional equipment to control and distribute electrical energy for various locations within the complex. This chapter deals with the installation of equipment associated with the distribution system on a premises.

Working space and clearances are required around electrical equipment that must be accessible for examination or service. These clearances ...

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