RIT Revision: Arrangement of Final Circuits

A circuit   connected directly to current-using   equipment, or to socket outlet(s) is called

• final circuit

• sub circuit

• protective circuit

• main circuit

Normally a lighting circuit feed from a MCB rated at

• 6 A

• 16 A

• 20 A

• 32 A

In normal installations, good planning usually limits the number of lights on each circuit to about

• 5

• 10

• 20

• 30

The simplest lighting circuit is one lamp controlled by one switch and is known as

• one-way control circuit

• two-way control circuit

• intermediate control circuit

• double way control circuit

For a lighting circuit to be independently controlled from two positions like on a staircase,

• one-way switches is required.

• two-way switches are required.

• 2-pole switch is required

• multi-pole switch is requied

A socket outlets complying with SS 145 is refer to

• 
• 
• 
• 

The PVC cable size for a radial final circuit using 13A switched socket outlets supplied from a 20A MCB is

• 1.0 mm²

• 1.5 mm²

• 2.5 mm²

• 4 mm²

The MCB rating of a ring circuit using 13A switch socket outlet is

• 10A

• 20A

• 32A

• 40A

The PVC cable size for a ring circuit supplied from 32A MCB is

• 1.0 mm²

• 1.5 mm²

• 2.5 mm²

• 4.0 mm²

The PVC cable size required for a radial circuit using 13A socket outlet supplied from a 32A MCB is

• 1.0 mm²

• 2.5 mm²

• 4.0 mm²

• 6.0 mm²