Electrical - Module 11 - Residential Wiring

If the local building code surpasses the requirements of the NEC, what should you follow?

• Follow the local building code.
• Consult with a non-certified electrician
• Ignore both the local building code and the NEC
• Follow the National Electrical Code (NEC)

Who provides the single-phase service entrance to a residence?

• Electrical contractor
• Homeowner
• Local government
• Utility company

What do you need to review before calculating the service?

• Specific requirements, irrelevant data, and incorrect method
• Outdated information, irrelevant data, and simple method
• Review the floor plan

• Specific requirements, relevant data, and calculation method

According to the NEC, for residential occupancies, you will figure ___ VA per square feet of living space.

• 3
• 7
• 5
• 10

What formula do you use to find AREA?

• Use the specific formula for the shape you are calculating the area of.
• Ask a friend for the answer
• Length x Width

• Use the same formula for all shapes

What spaces in a residence do you NOT include when calculating lighting load?

• Open porches, garages, or unused/unfinished spaces that are not adaptable to future use

• Bedrooms, bathrooms, kitchen
• Basement, study room, guest room
• Living room, dining room, laundry room

Look at the floor plan:

Calculate the area and the general lighting load required.

• The area is X square feet and the general lighting load required is Z watts.
• 65 x 50 x 45 = 146250

  146250 x 2 = 292500

• The area is Z square feet and the general lighting load required is Y watts.
• 65 x 45 = 2925

  2925 x 3 = 8775

Which NEC article provides rules regarding the application of demand factors to certain types of loads?

• NEC Article 250
• NEC Article 310
• NEC Article 500
• NEC Article 220

What is a demand factor?

• A demand factor is a term used to describe the efficiency of a power plant.
• A demand factor is a unit of measurement for electrical resistance.
• Max amount a VA load expected at any given time compared to the total connected load of the circuit.

• A demand factor is a measure of the total energy consumed in a system.

What demand factor of each of the fixed appliance loads on a neutral be computed at/

• 80%

• 100%

• Sum of total power consumption of fixed appliances / Total number of fixed appliances
• Sum of average power demand of fixed appliances / Total number of fixed appliances