We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
ELECTRICAL CONDUCTORS 59
37. Will the neutral wire be positive or negative?
38. If 110 volt lamps or motors be connected to each side of a 110-220 volt 3-wire circuit, will they operate at 110 or 220 volts ?
39. If lamps or motors are attached to each side of a 3-wire circuit, the total, and the combined amperage capacity of those attached to each side being unequal, what will happen?
-40. Explain the current action illustrated in Fig. 17.
41. What is the correct designation of the two outside win
42. What is the effect of an unbalanced load on the generators supplying a 3-wire system?
43. Were the load equally balanced would there be any need for a fuse in the neutral wire?
44. Why should projector lamps be connected to opposite sides of a 3-wire circuit?
45. Why do power plants of small capacity insist upon the connection of both projector light sources to the outside wires of a 3-wire system ?
. 46. Why is such a connection unobjectionable if the power is taken through transformers, but highly objectionable if the voltage is reduced by rheostatic resistance?
— 47. Explain the problem set up by Fig. 18 and the accompanying text.
48. How may the unbalance of the load be measured?
49. How may wire sizes of a 3-wire circuit be calculated ?
Switches, page 75
50. What is meant by a single-pole, single-throw (S.P.D.T.) switch ?
51. What is a single-pole, double-throw switch? ^Itui. — 52. Describe the several types of single-throw switches.
53. Is it of vital importance that switches be conveniently located ?
54. In installing knife switches, what should be avoided? How should the blade or blades be placed?.
55. How often should knife blade switches be inspected? What faults should be looked for at inspection "'
56. 57.
What is meant by an ''inclosed switch" and why is it inclosed ? ,
58. How should inclosed switches be connected?
59. Is it desirable to so connect all knife switches that the blades will not be charged when open? >#