BS7671 Isolation and Switching Quiz

What are the three main functions for isolation and switching in BS7671?

• Isolation, Switching off for mechanical maintenance, Emergency switching

• Functional switching, Automatic isolation, Manual switching

• Isolation, Automatic switching, Emergency maintenance

• Manual isolation, Switching off for electrical maintenance, Functional switching

According to BS7671, what must every installation and all items of equipment be provided with?

• Non-automatic means of isolation and switching to prevent or remove hazards

• Automatic means of isolation and switching to prevent or remove hazards

• Manual means of isolation only

• Functional switching only

What is the main area of the BS7671 that deals with Isolation and Switching?

• Chapter 53

• Chapter 132.15

• Section 511

• Section 132.15

Every item of equipment must comply with which standards according to BS7671?

• The relevant British Standard

• The relevant International Standard

• The relevant European Standard

• Any standard deemed suitable

What is the purpose of devices selected according to BS7671?

• They can fulfill more than one purpose but must be suitable for the primary one.

• They must be suitable for the primary purpose only.

• They can fulfill more than one purpose but must be suitable for a secondary one.

• They must be automatic and suitable for all purposes.

What is the purpose of isolation according to the document?

• To enable persons to safely carry out work on, or in the vicinity of normally live parts.

• To prevent access to moving parts during maintenance.

• To stop an operation in an emergency.

• To combine functional switching with mechanical maintenance.

Switching off for mechanical maintenance is intended to prevent what?

• Electric shock

• Physical injury

• Mechanical damage

• Electrical failure

What may emergency switching be intended to stop?

• An operation

• A mechanical maintenance

• A live part from being isolated

• The need for functional switching

What does functional switching include according to the document?

• 12 or 24 hr supply switching or a thermostat.

• Emergency stopping of operations.

• Isolation of live parts.

• Cutting off electrical systems as a whole.

According to BS7671, how many functions can one device be used to fulfill?

• Only one function

• Exactly two functions

• Two or more functions

• Functions are not specified