2365 203 #15 - SWA Cables

What does SWA stand for?

• Single Wire Assembly

• Steel Wire Armoured

• Shielded Wiring Application

• Solid Wire Armature

What is the purpose of the steel wire armour in SWA cable?

• Improve voltage rating

• Provide mechanical protection

• Increase flexibility

• Prevent water ingress

Where is SWA cable commonly used?

• In light fittings

• On domestic plasterboard walls

• In outdoor or underground installations

• In extension leads

What is the outer sheath of SWA cable made from?

• Copper

• PVC or thermoplastic

• Tinned steel

• Silicone rubber

How is SWA cable typically terminated?

• With standard T&E clips

• With compression glands and banjo washers

• With cable ties

• Using junction strips

What does the “banjo” do in an SWA termination?

• Supports the cable

• Allows water drain-off

• Provides earth continuity through the armour

• Tightens the outer sheath

Can the armour of an SWA cable be used as a CPC?

• No, never

• Yes, if calculated to meet CPC requirements

• Only in conduit

• Only indoors

What core colours are typically used in a 3-core SWA cable?

• Blue, black, red

• Brown, black, grey

• Red, yellow, green

• Green, blue, white

What regulation governs the use of cable armouring as a CPC?

• Part P

• BS7671 Regulation 543.2

• EAWR

• GN3 Section 3

Why must SWA cables be securely cleated?

• To look tidy

• To reduce EMI

• To prevent mechanical stress and movement

• To make insulation easier