Energy & Power
What kind of energy comes from the sun and is harvested using solar panels?
Solar Energy
What is the formula of Ohm’s Law?
V = I × R
What type of circuit has only one path for current?
Series Circuit
What is the standard system for determining the size of electrical wires?
American Wire Gauge (AWG)
What is the maximum load of a 15A circuit breaker based on the table, "Standard Ampere Rating for Fuses and Circuit Breakers"?
12A
What is the formula for electrical power?
P = V × I
If a circuit has 12V and 3A, what is its resistance?
4 ohms
In which circuit does total resistance decrease as more components are added?
Parallel Circuit
What color wire is typically used for ground in the Philippines?
Green or green with yellow stripes
What is the maximum wattage or volt-ampere assigned to a single convenience outlet when computing electrical loads?
180 W or 180 VA
What is the power consumed by an appliance running at 220V and 2A?
440 watts
What happens to current if resistance increases but voltage stays the same?
Current decreases
Total resistance of three 10-ohm resistors in series?
30 ohms
What type of protection device responds to arcing faults to prevent fires?
AFCI (Arc Fault Circuit Interrupter)
What conduit size is required for three (3) #6 AWG (14.0 mm2) wires?
32 mm diameter
Name one renewable and one non-renewable energy source used in buildings.
Ex. Renewable: Wind / Non-renewable: Coal
An LED light runs on 24V and 0.8A. What is the resistance?
30 ohms
What is the total resistance of three resistors in parallel: 12Ω, 12Ω, and 6Ω?
3Ω
Where is GFCI required according to PEC for residential units? (Name 3 locations)
Bathrooms, kitchens, outdoors, garages, basements, etc.
If each convenience receptacle has a maximum load of 180 watts, how many single receptacle outlets can be connected to a single branch circuit protected by a 20-ampere circuit breaker?
20 single receptacle outlets
Compare renewable and non-renewable energy in terms of sustainability and reliability.
Renewables are sustainable but weather-dependent; non-renewables are reliable but polluting and finite.
A fan is rated at 220V and draws 3A. Find the power and resistance.
Power = 660W; Resistance = 73.33 ohms
Why are parallel circuits preferred in home lighting systems?
Each device operates independently; one failure doesn’t shut down the others.
Explain the function of a pull box.
It allows easier conductor pulling across long distances or bends without damaging wires.
If each lighting outlet or fixture has a maximum load of 100 watts, how many fixtures can be connected to a single branch circuit protected by a 15-ampere circuit breaker?
27 lighting outlets or fixtures