High Voltage Areas

What is the definition of high voltage as given by the Electricity (Safety) Regulations 2010?

• The voltage exceeding 500 volts AC or 1000 volts DC.
• The voltage exceeding 2000 volts AC or 3000 volts DC.
• The voltage exceeding 1000 volts AC or 1500 volts DC.
• The voltage exceeding 5000 volts AC or 7000 volts DC.

What is the definition of low voltage as given by the Electricity (Safety) Regulations 2010?

• A voltage not exceeding 50 volts AC or 120 volts ripple-free DC, but not exceeding 1000vAC or 1500VDC.

• A voltage not exceeding 100 volts AC or 200 volts ripple-free DC but not exceeding 3000vAC or 1600VDC.

• A voltage not exceeding 10 volts AC or 20 volts ripple-free DC but not exceeding 1200vAC or 2500VDC.

• A voltage not exceeding 500 volts AC or 1000 volts ripple-free DC but not exceeding 1050vAC or 1050VDC.

Why does equipment operating at high voltage require greater insulation and clearance distance than low voltage equipment?

• To make trained persons feel confident working around HV.

• HV can enhance insulation in equipment and cause greater seperation.

• HV can break down insulation/equipment and cause them to be conductive, including the air.

• To stop people from working on it.

Which four (4) of these are primary dangers of working in high voltage areas?

• Temporary Blindness, Vertigo, Stress & Cuts

• Electric Shock, Arc Flash, Fire & Burns

• Exhaustion, Static Shocks, Radiation & Fractures

• Loud Noises, Workplace Disagreements, Poor Diet & Concussion

In regards to high voltage areas, what does M.A.D stand for?

• 
  Maximum Arc Distance

• Maximum Approach Distance

• Minimum Arc Distance

• Minimum Approach Distance

Which of the following is true about Touch Voltage?

• It only happens if the person is standing on a wet surface.

• It happens regardless of whether the person is wearing wet or dry clothing or standing on a wet or dry surface.

• It only happens if the person is wearing insulated gloves and boots.

Which of these statements describes "Step Voltage" in HV Works?

• It is Potential Difference created by decreasing voltage radiating from a fault in the ground .

• It is the voltage created by moving quickly on a static surface.

• Step voltage is the voltage drop across a resistor.
• A shock that makes you step funny until you recover.

What is Clearance Distance?

• Prevention of rodent damage in HV gear

• How far workers should be from each other

• An insulator surface that prevents tracking

• An air gap that prevents arcing

What is Creepage Distance?

• Prevention of rodent damage in HV gear

• How far workers should be from each other

• An insulator surface that prevents tracking

• An air gap that prevents arcing

Which two [2] of these are dangers of working around high voltage equipment?

• High voltage equipment and electrical systems can generate heat and sparks, which can cause a fire to start.

• High voltage moving machinery produces excessive noise.

• Electric shock when a person comes into contact with (or close to) live electrical wires or equipment.

• Arc flash due to excessive creepage distance.

• Induced voltages resulting in burns to the hands.