It’s easy to flip a light switch or turn on your television without thinking of the processes going on behind them. What powers them up? Electricity! How does that electricity work? That’s for you to tell us! In this quiz, we’ll be trying to gauge your knowledge on all things electricity, with specific reference to the United Kingdom. What do you know about it all? Let’s find out!
Lift installations
Mobile offshore electrical systems
Distributor's networks
Locations containing a bath or shower
Cabins containing sauna heaters
Fountains
Highway power supplies
Lightning protection
Demolition site installations
Electric fences
Medical locations
Motor caravans
Electricity Safety, Quality and Continuity Regulations
Electricity at Work Regulations
The Building Regulations
Requirements for Electrical Installations
Preventing current from passing through the body
Ensuring adequate continuity between extraneous conductive parts
Automatic disconnection of supply in the event of a fault
Separation of equipment from the supply using a safety isolating transformer
No earth facility is supplied by the distributor
The supply is from a low voltage generator
Earthing is via the distributor’s cable armour
The electrical system is TN-C
24V ac
48V ac
50V ac
120V ac
Chapter 32
Chapter 53
Appendix 4
Appendix 5
Large electric motors
Fire alarm systems
Emergency lighting circuits
Reduced low voltage supplies
1.0mm2
1.5mm2
2.5mm2
4.0mm2
75m2
100m2
50m2
200m2
9
16
22
32
1.0mm2
1.5mm2
2.5mm2
4.0mm2
Nominal voltage
frequency
Earth loop impedance Ze
Power factor
Health screening services
Pleasure craft
Mobile machinery to BS EN 60204-1
Traction equipment of electric vehicles
Ordinary persons from operating equipment
Intentional contact with exposed parts
Intentional bodily approach to a live part
Unintentional bodily approach to a live part
Electrical separation
Barriers or enclosures
Insulation of live parts
Placing out of reach
The supply point and subtracting the value of internal loop impedance (R1 + R2)
The furthest socket-outlet from the supply
The origin of supply
both the supply and at the furthest socket-outlet, and subtracting one result from the other
0.4s
0.8s
4.0s
5.0s
30 degrees Celsius
55 degrees Celsius
65 degrees Celsius
70 degrees Celsius
Due to low insulation resistance
In a circuit which is electrically sound
Due to a fault of negligible impedance
In a line conductor in contact with earth
Maximum demand and diversity value
Short circuit and overload current
Design current and distributor’s main fuse
Short circuit and earth fault currents
Be rated lower than the design current
Meet the requirements of BS 7846
Be able to withstand the prospective fault current
Not operate due to a line to earth fault
A push-button controlling an all-pole contactor
A manually operated switch
A circuit-breaker
A luminaire support coupler
Switch with off position at the bottom and mounted at 2.75m from the ground
Switch with off position at the top and mounted at 3.75m from the ground
Switch with off position at the bottom and mounted at 3.75m from the ground
Switch with off position at the top and mounted at 2.75m from the ground
Wait!
Here's an interesting quiz for you.