Electrical Safety Quiz

What is defined as a current impulse with a virtual front time of 8 ps and a time to half-value of 20 us according to BS 7671?

• Accessory

• Agricultural and horticultural premises

• 8/20 Current impulse

• Appliance

What does the term "Accessory" refer to in the context of BS 7671?

• A device that mitigates the effects of arcing faults

• A device other than current-using equipment, associated with such equipment or with the wiring of an installation

• A part providing a defined degree of protection against contact with live parts

• Insulation applied to live parts to provide basic protection

What is the purpose of an "Arc fault detection device (AFDD)"?

• To provide a defined degree of protection against contact with live parts

• To protect against electric shock under fault-free conditions

• To mitigate the effects of arcing faults by disconnecting the circuit when an arc fault is detected

• To transmit signals for control, detection, supervision or measurement of the functional status of a main circuit

Which of the following is NOT included in the definition of "Agricultural and horticultural premises"?

• Rooms where livestock are kept

• Greenhouses where plants are grown

• Rooms where fertilizers are stored

• Amusement devices for public entertainment

What is the definition of "Ambient temperature" in the context of BS 7671?

• The temperature of the air or other medium where the equipment is to be used

• The temperature of a device by overcurrent coordination

• The temperature inside agricultural or horticultural premises

• The temperature at which an arc fault detection device operates

What is the purpose of a bonding conductor?

• To provide a path for currents at radio frequency

• To protect cables and accommodation of electrical equipment

• To provide equipotential bonding

• To enable the connection or disconnection of two flexible cables

What does a bonding network (BN) do?

• Supports transverse supporting elements

• Provides a path for currents from direct current (DC) to radio frequency (RF)

• Mechanically retains the cable or conduit

• Accommodates equipment generally for pleasure or demonstration purposes

What is a non-stationary unit, intended to accommodate equipment generally for pleasure or demonstration purposes, called?

• Cable ladder

• Booth

• Caravan

• Cable tunnel

What is the definition of a building void, non-accessible?

• A space within the structure or the components of a building which has no ready means of access

• A space within the structure or the components of a building accessible only at certain points

• An enclosure above or in the ground, ventilated or closed, having dimensions which do not permit the access of persons but allow access to the conduits and/or cables throughout their length during and after installation

• A corridor containing supporting structures for cables and joints and/or other elements of wiring systems

What is a cable ladder?

• A means of enabling the connection or disconnection, at will, of two flexible cables

• A cable support consisting of a series of transverse supporting elements rigidly fixed to main longitudinal supporting members

• A closed enclosure normally of rectangular cross-section, for the protection of cables

• A corridor allowing persons to pass freely throughout the entire length