Discuss Concentric stranded cable???? in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net

davidanthony41

New EF Member
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Has anyone come across this cable before .i havnt it looks like 10 1mm twisted together and the mains earth is 4 2.5mm.i was all set to fail it till my mate said it was consenteric is he right
 

Strima

Electrician's Arms
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St Neots
Could well be. Is this direct from the meter or sub main?
 

Marvo

Admin and gender confused
Staff member
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South Africa
Yup, deffo split con cable. You could maybe fail the termination into the MCB clamp, it's usually against manufacturers recommendations having so many wires in it, should really be using a palm lug or similar.
 

Rob

Control System Engineer
Electrician's Arms
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Is it allowed under BS7671?
Split concentric is, concentric is not.

It also does not meet the requirements of negating the need for RCD (additional protection) if is buried in a wall for example.
 

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