Central Stations
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In our eReader you can find the full English version of the book. Read Central Stations Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Central Stations
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; distance, 20 ft. ; drop, 1 volt. Substitute in formula (54): Or. Mils = (22 X / X L) -5- V = (22 X 4 X 20) + 1 = 1, 760 dr. Mils.
Now referring to Table 154, the standard size wire next larger than 1, 760 cir. Mils is No. 16, which has an area of 2, 583 cir. Mils. This size wire would be satisfactory were it not for the fact that the National Electrical Code prohibits the use of any wire smaller than No. 14. Hence, No. 14 must be used in this case. (In outdoor service no copper wire smaller t...han No. 8 or No. 6 has sufficient mechanical strength to give satisfactory service. ) No. 14 rubber insulated wire has a safe current- carrying capacity of 15 amp. Hence, is amply large to carry the 4 amp. Load in circuit AB\.
BRANCH AB 2 .
Load, 6 amp. ; distance, 40 ft. ; drop, 1 volt. Substitute in formula (54): Cir. Mils = (22 X / X L) -=- V = (22 X 6 X 40) -i- 1 = 5, 280 cir. Mils. Referring to Table 154, the next larger size wire is No. 12 which has an area of 6, 530 cir. Mils and since it has a current-carrying capacity of 20 amp.
What to read after Central Stations?
You can find similar books in the "Read Also" column, or choose other free books by Terrell Croft to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
; distance, 20 ft. ; drop, 1 volt. Substitute in formula (54): Or. Mils = (22 X / X L) -5- V = (22 X 4 X 20) + 1 = 1, 760 dr. Mils.
Now referring to Table 154, the standard size wire next larger than 1, 760 cir. Mils is No. 16, which has an area of 2, 583 cir. Mils. This size wire would be satisfactory were it not for the fact that the National Electrical Code prohibits the use of any wire smaller than No. 14. Hence, No. 14 must be used in this case. (In outdoor service no copper wire smaller t...han No. 8 or No. 6 has sufficient mechanical strength to give satisfactory service. ) No. 14 rubber insulated wire has a safe current- carrying capacity of 15 amp. Hence, is amply large to carry the 4 amp. Load in circuit AB\.
BRANCH AB 2 .
Load, 6 amp. ; distance, 40 ft. ; drop, 1 volt. Substitute in formula (54): Cir. Mils = (22 X / X L) -=- V = (22 X 6 X 40) -i- 1 = 5, 280 cir. Mils. Referring to Table 154, the next larger size wire is No. 12 which has an area of 6, 530 cir. Mils and since it has a current-carrying capacity of 20 amp.
What to read after Central Stations?
You can find similar books in the "Read Also" column, or choose other free books by Terrell Croft to read onlineMoreLess
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