Patent ID: 6861951
Filing Date: 2005-03-01
Classification: G06F,G08B

Abstract:
1. A method of calculating an electrical parameter associated with an alarm system, the method comprising: receiving first user inputs at a computer aided drawing system, the first user inputs being indicative of graphical placement in a drawing area of a first alarm appliance, a second alarm appliance, and a third alarm appliance, the first alarm appliance and the second alarm appliance being separated in the drawing area by a first distance; receiving second user inputs at the computer aided drawing system, the second user inputs being indicative of a first electrical connection between the first alarm appliance and the second alarm appliance, the second user inputs being indicative of a second electrical connection between the second alarm appliance and the third alarm appliance; storing first data indicating that the first electrical connection is to be treated as a first scaled wire during an electrical calculation; storing second data indicating that the second electrical connection is to be treated as a non-scaled wire during the electrical calculation; receiving a numeric user input indicative of a wire length associated with the second electrical connection; determining a first electrical resistance associated with the first electrical connection based on the first distance; and determining a second electrical resistance associated with the second electrical connection based on the numeric user input indicative of the wire length.