[amp_mcq option1=”31.25 percent of copper” option2=”33.3 percent of copper” option3=”distributor, a 3-wire distributor with same maximum voltage to earth uses only A. 31.25 percent of copper B. 33.3 percent of copper C. 66.7 percent of copper” option4=”125 percent of copper” correct=”option1″]<\/p>\n
The correct answer is A. 31.25 percent of copper.<\/p>\n
A 2-wire D.C. distributor has two conductors, one for the positive voltage and one for the negative voltage. A 3-wire D.C. distributor has three conductors, one for the positive voltage, one for the negative voltage, and one for the ground. The ground conductor is used to provide a safe path for current to flow in the event of a fault.<\/p>\n
The amount of copper used in a distributor is proportional to the square of the voltage. This means that a 3-wire distributor with the same maximum voltage to earth as a 2-wire distributor will use only 31.25% of the copper.<\/p>\n
Option B is incorrect because it is the amount of copper used in a 3-wire distributor with twice the maximum voltage to earth. Option C is incorrect because it is the amount of copper used in a 2-wire distributor with twice the maximum voltage to earth. Option D is incorrect because it is the amount of copper used in a 3-wire distributor with four times the maximum voltage to earth.<\/p>\n","protected":false},"excerpt":{"rendered":"
[amp_mcq option1=”31.25 percent of copper” option2=”33.3 percent of copper” option3=”distributor, a 3-wire distributor with same maximum voltage to earth uses only A. 31.25 percent of copper B. 33.3 percent of copper C. 66.7 percent of copper” option4=”125 percent of copper” correct=”option1″]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[949],"tags":[],"class_list":["post-59374","post","type-post","status-publish","format-standard","hentry","category-transmission-and-distribution","no-featured-image-padding"],"yoast_head":"\n