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.
In 1789, Congress submitted twelve articles of amendment to the states. Ten of these articles, written by Madison, achieved passage on December 15, 1791 and became the United States Bill of Rights. The Tenth Amendment set the guidelines for federalism in the United States.