By Stephen L. Herman

Electric WIRING commercial, 15E is the total, step by step consultant to wiring commercial constructions in line with the present 2014 nationwide electric Code. an excellent on-the-job reference for apprentice and journeyman electricians, development contractors, and an individual operating within the electric box, electric WIRING INDUSTRIAL,15E offers concise, hassle-free details in a pragmatic, task-oriented sort. bankruptcy themes discover all basics, from fitting new electric carrier and changeovers from previous platforms to venture making plans and upkeep tactics. The ebook highlights the 2014 nationwide electric Code in the course of the readings to illustrate code updates, in addition to tips on how to follow requisites to sitework, feeder bus platforms, panelboards, fiber optics, harmonics, and extra . as well as a whole pattern set of commercial development plans, electric WIRING business, 15E illustrates ideas with stimulating drawings, pictures, and different pix to help studying and advance the reasoning abilities which can increase you to the following point of your profession.

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CHAPTER 2 The Unit Substation Copyright © 2015 Cengage Learning®. 26 High-voltage section 1 Pothead 2 Lightning arrester 8 Secondary bus Transformer section 3 High-voltage fused switch 4 Grounding bus The Unit Substation 27 Low-voltage section 5 Transformer 6 Taps 7 Load-side terminals 9 Neutral connections FIGURE 2-7 Unit substation. The following steps are then completed in the order given: (1) The cable conductors are connected to the terminals at the end of the porcelain insulators; (2) the lead cable is wiped (soldered) to the wiping sleeve; and (3) the pothead is filled with a protective and insulating compound (usually made from an asphalt or resin base).

622 in. 560 in. 635 in. 632 in. 660 in. ⁄2 Electrical Metal Tubing ⁄2 Electrical Nonmetallic Tubing ⁄2 Flexible Metal Conduit ⁄2 Rigid Metal Conduit ⁄2 Intermediate Metal Conduit Copyright © 2015 Cengage Learning®. Copyright 2015 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has deemed that any suppressed content does not materially affect the overall learning experience.

Copyright © 2015 Cengage Learning®. Outlet boxes and device boxes use their nominal measurement as their trade size. For example, a 4 in. ϫ 4 in. ϫ 11⁄2 in. does not have an internal cubicinch area of 4 in. ϫ 4 in. ϫ 11⁄2 in. ϭ 24 cubic inches. 3 This table shows trade sizes in two columns—millimeters and inches. Table 1-6 provides the detailed dimensions of some typical sizes of outlet and device boxes in both metric and English units. In practice, a square outlet box is referred to as 4 ϫ 4 ϫ 11⁄2-inch square box, 4> ϫ 4> ϫ 11⁄2> square box, or trade size 4 ϫ 4 ϫ 11⁄2 square box.

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