CONNECTIONS AND APPLICATIONS OF AUTOTRANSFORMERS


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CONNECTIONS AND APPLICATIONS OF AUTOTRANSFORMERS
CONNECTIONS AND APPLICATIONS OF AUTOTRANSFORMERS116. Use of autotransformers. The National Electrical Code allows the use of autotransformers for supplying interior-wiring systems under certain conditions.A branch circuit may be supplied through an autotransformer only if the system supplied has a grounded conductor which is electrically connected to a grounded conductor of the system supplying the autotransformer, with the following exceptions. An autotransformer can be used to extend or add a branch circuit for an equipment load without the connection to a similar grounded conductor when transforming from a nominal 208 V to a nominal 240-V supply or similarly from 240 t…
Citation
Terrell Croft; Frederic P. Hartwell; Wilford I. Summers: American Electricians' Handbook, Sixteenth Edition. CONNECTIONS AND APPLICATIONS OF AUTOTRANSFORMERS, Chapter (McGraw-Hill Professional, 2013), AccessEngineering Export