Where is solid 18 gauge copper wire typically used in residential air-conditioning installation?
A) The thermostat control wire
B) The power wire to the indoor unit
C) Inside the equipment supplying power to the major loads
D) The power wire to the condensing unit
Question 2
What is the maximum level of the normal CO range?
A) 9 ppm B) 1 ppm C) 10 ppm D) 36 ppm