Electrical Safety Standards Quiz

What constitutes the service protective device after the electric meter?

• Transformers
• Circuit breakers or fuses
• Surge protectors
• Voltage regulators

What is the maximum number of disconnects per supply grouped in any one location?

• Four

• Five

• Six

• Seven

What is the minimum horizontal clearance in mm?

• 1000

• 1500

• 2000

• 2500

What is the minimum vertical clearance over roofs accessible to pedestrians in mm?

• 3400

• 3000

• 2500

• 2000

What is the minimum distance required between overhead power lines and buildings in mm?

• 3000

• 4500

• 6000

• 7500

Which device is primarily used for overcurrent protection in electrical circuits?

• Transformers

• Fuses

• Capacitors

• Inductors

What is the maximum allowable voltage drop in a residential electrical system?

• 3%

• 5%

• 7%

• 10%

What is the standard color for grounding wires in electrical installations?

• Black

• Green

• Red

• Blue

What is the maximum allowable current for a standard 15-amp circuit?

• 10 amps

• 15 amps

• 20 amps

• 25 amps

What is the purpose of a circuit breaker in an electrical system?

• To increase voltage

• To protect against overcurrent

• To store energy

• To convert AC to DC