By Paul Rosenberg
In response to the 1999 nationwide electric Code® RulingsIncludes greater than a hundred illustrationsWith specific sections on the best way to take a attempt and the way to arrange for enterprise competency examsFor an individual getting ready for electricians examinations—Apprentice, Journeyman, or MasterQuestions and solutions for Electricians Examinations is an Audel vintage, thought of the main thorough at the topic in assurance and content material. The absolutely revised thirteenth variation, in accordance with the 1999 electric Code®, is written for a person getting ready for one of many a variety of electricians examinations: Apprentice, Journeyman, or grasp. It presents the license applicant with an figuring out of idea in addition to of all definitions, standards, and rules integrated within the 1999 nationwide electric Code® via quite a few examples in question-and-answer shape. distinctive positive factors of the thirteenth version comprise sections on the right way to take a try out and the way to organize for enterprise competency tests.
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Extra info for Audel Questions And Answers For Electrician's Examinations
May be designated as shown below: (a) Closed when device is in energized or operated position. (b) Closed when device is in deenergized or nonoperated position. (aa) Closed when operating mechanism of main device is in ener- gized or operated position. (bb) Closed when operating mechanism of main device is in deen- ergized or nonoperated position. 6). 1 Closed contact (break) See also SWITCHING FUNCTION (item 77). 2 Open contact (make) See also SWITCHING FUNCTION (item 77). 3 Transfer See also SWITCHING FUNCTION (item 77).
Additional windings may be shown or indicated by a note. 1-1956. 2 Application: transformer with magnetic core shown and with a shield between windings. The shield is shown connected to the frame. 1-1965 for interconnections for complete symbol. 1 Current transformer with polarity marking. Instantaneous direction of current into one polarity mark corresponds to current out of the other polarity mark. Symbol used shall not conflict with item 77 when used on same drawing. 1 Potential transformer with polarity mark.
7 Direct-current shunt motor or 2-wire generator; with commutating or compensating field winding or both* (continued) *The broken line (- — -) indicates where line connection to a symbol is made and is not a part of the symbol. 12 Direct-current, 3-wire shunt generator; with commutating or compensating field winding or both* (continued) *The broken line (- — -) indicates where line connection to a symbol is made and is not a part of the symbol. 15 Direct-current balancer, shunt wound* N N (continued) *The broken line (- — -) indicates where line connection to a symbol is made and is not a part of the symbol.