Electrical Installation earthing and bonding

What rating of circuit protection device would be used to protect a radial circuit?

(both minimum and maximum)

• 16 Amp

• 20 Amp

• 6 Amp

• 32 Amp

What size cables are used for A3 circuits?

• min 1.5mm

• min 6mm

• min 2.5mm

• min 4mm

What size cables are used for A3 circuits wired in MI?

• min 1.5mm

• min 6mm

• min 2.5mm

• min 4mm

What size cables are used for A1 circuits wired in MI?

• min 1.5mm

• min 6mm

• min 2.5mm

• min 4mm

What is the maximum floor area for A1 circuits wired in MI?

• 100m2

• 75m2

• 50m2

• Unlimited m2

What is the maximum floor area for A2 circuits wired in PVC?

• 100m2

• 75m2

• 50m2

• Unlimited m2

What is the maximum floor area for A3 circuits wired in PVC?

• 100m2

• 75m2

• 50m2

• Unlimited m2

What size cables are used for A2 circuits?

• min 1.5mm

• min 6mm

• min 2.5mm

• min 4mm

What size cables are used for A2 circuits wired in MI?

• min 1.5mm

• min 6mm

• min 2.5mm

• min 4mm

Why is the largest load / protective device placed next to the main switch?

• To avoid over heating of the busbar

• To reduce the risk of electric shock

• To balance the load

• To avoid overloading the circuit