2365 203 #16 - T&E Cables

What does “Twin and Earth” refer to in T&E cable?

• Two phases and an RCD

• Two insulated conductors and one bare CPC

• Twin-phase system

• Double-layer insulation

What is the CPC in a Twin and Earth cable?

• Circuit Phase Connector

• Control Panel Conductor

• Circuit Protective Conductor

• Core Protective Casing

What are the typical core colours in T&E for single-phase use?

• Red, black, green

• Brown, blue, bare copper

• Blue, black, green

• Black, brown, yellow

What size T&E cable is commonly used for domestic lighting circuits?

• 1.0mm² or 1.5mm²

• 2.5mm²

• 4.0mm²

• 10.0mm²

What size T&E cable is typically used for socket outlets?

• 1.0mm²

• 1.5mm²

• 2.5mm²

• 6.0mm²

What insulation material is used in most T&E cables?

• Silicone

• Thermoset

• PVC (Polyvinyl Chloride)

• XLPE

Where is T&E cable commonly used?

• Underground services

• Embedded in plaster or clipped direct indoors

• Swimming pool circuits

• Overhead lines

What type of installation method is “clipped direct”?

• Buried in trunking

• Laid across the floor

• Fixed directly to a surface with clips

• Secured inside MICC

What is one disadvantage of T&E cable?

• Too flexible

• No mechanical protection

• Requires armouring

• Too heavy

What regulation affects how and where T&E can be installed?

• Part L

• BS7671 Regulation 522.6.202

• Part G

• GN3 Section 3