Domestic Circuits

Question 1

Radial Circuit

Answer 1

Feeds each light in turn - these circuits are used for lighting circuits

Identified by having only 1 conductor

Question 2

Ring final circuit

Answer 2

Used for domestic 13 A sockets - circuit cables start and finish at consumer unit and pick up each socket in turn

Identified by having 2 conductors

Question 3

What does it mean if more than 2 conductors are found in a circuit?

Answer 3

A spur has been taken from the circuit at the consumer unit

Question 4

What level of protection is required for sockets that “ordinary persons” can access as per Regulation 411.3.3 of BS 7671?

Answer 4

30 mA RCD