Electrical/Lighting ARE Building Systems

5. ELECTRICAL

Ground rod is a 8 to 10 ft copper rod (1/2” or ¾”) stabbed into earth soil to provide grounding for any electrical metering system.
Not: Breaker, disconnect switch, switch box
For large 16 story building, the best electrical distribution for minimum wire size and voltage drop is 277/480 volts, three phase 4 wire
Not: three wire of any voltage, 120/208 volt 4 way
Lightning protection can be provided by: A system of lightning rods and conductors extended to the ground, an overhead grid of wire conductors extended to the ground, a system of lightning rods connected to the building steel frame and then to the ground

If all electric building has a very smooth electric power profile: Retrofit of this building for lighting is the best reduction of power consumption.
GFI protection is required in residential restrooms
Not: No lower than 4’AFF, below toilet or lavatory fixtures, minimum 6 ft from tub or shower
Brach circuit breakers are in last panels downstream of feeders feeding the appliances.

6. LIGHTING

Coefficient of utilization in lighting level calculations is the percentage of lamp lumens to reach the work plane
Not: Leave the luminaries, the amount lost due to age, lost due to environmental dust
Controlling lights within two spaces is a double switch
Not: Two single-pole, double-throw switch