Quiz on Chapter 46 Isolation and Switching

What does Chapter 46 deal with in terms of isolation and switching?

• Automatic isolation and switching

• Non-automatic local and remote isolation and switching

• Isolation and switching for non-electrical equipment

• Isolation and switching for mechanical equipment only

In TN-C and TN-C-S systems, what should not be isolated or switched according to 461.2?

• Neutral conductor

• PEN conductor

• Live conductor

• Ground conductor

What is required if protective equipotential bonding is installed in TN-C-S systems?

• Isolation of the neutral conductor

• Switching of the neutral conductor

• No isolation or switching of the neutral conductor

• Isolation of the live conductor

What should every circuit be provided with according to 462.2?

• Automatic switching means

• Isolation means for all live conductors

• Manual switching means

• Emergency shutdown means

What is the function of a main switch intended for operation by ordinary persons?

• To provide emergency lighting

• To interrupt both live conductors of a single-phase supply

• To increase voltage supply

• To reduce current flow

What is one precaution for devices designed for isolation?

• Located in an open space

• Padlocking

• Placed on the floor

• Covered with a cloth

Where should a single-pole switching device not be placed?

• In the live conductor

• In the neutral conductor

• In the ground wire

• In the control device

What should earth faults in control circuits not cause?

• Increased efficiency

• Unintentional starting

• Reduced voltage

• Enhanced safety

What is the provision for reverse-current braking of a motor?

• Increase speed

• Avoidance of reversal

• Enhance power

• Reduce noise

What is the purpose of emergency switching off?

• Increase power

• Remove unexpected danger

• Enhance speed

• Reduce noise