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.
For the more than 100 years after its ratification, the Fourth Amendment was of little value to criminal defendants because evidence seized by law enforcement in violation of the warrant or reasonableness requirements was still admissible during the defendant's prosecution.