The track can fully handle 20 Amps, but because of field installation conditions such as the quality of existing building wiring, track distance run, number of connections, etc., it is common practice to de-rate the track by 20%.
The 4th Amendment, one of the most contraversial amendments ever drafted, was added to the Bill of Rights on December 15, 1791. The idea of being secure in your home, however, goes back into the Pre-Revolutionary period.
The sixteenth amendment to the Constitution of the United States was proposed to the legislatures of the several States by the Sixty-first Congress on the 12th of July, 1909, and was declared, in a proclamation of the Secretary of State, dated the 25th of February, 1913, to have been ratified by 36 of the 48 States.