GENERAL WIRING MATERIALS AND DEVICES


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GENERAL WIRING MATERIALS AND DEVICES
GENERAL WIRING MATERIALS AND DEVICES91. Insulators of various types are employed for interior-wiring work when the conductors are not installed in raceways. The more common types may be classified as knobs, cleats, tubes, crane insulators, and rack insulators. The accompanying sections and illustrations give data on many standard types. Insulators for outdoor and underground installations are discussed in Div. 8.Split knobs are shown in Figs. 4.136 and 4.137. Those of Fig. 4.136 are factory-assembled with a suppor…
Citation
Terrell Croft; Frederic P. Hartwell; Wilford I. Summers: American Electricians' Handbook, Sixteenth Edition. GENERAL WIRING MATERIALS AND DEVICES, Chapter (McGraw-Hill Professional, 2013), AccessEngineering Export