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4mm2 twin and earth cable

Former Community Member
Former Community Member
regarding 4mm2 cable was it ever available in the old colours with solid conductors rather than the 7 strands version? Ive just done a pre - inspection of a property before doing an EICR and found 2 radial circuits fed from 32A MCBS. The cables appear to be  larger than 2,5mm2 . I'm going back to inspect this property with a view to reducing the MCB's to 20A if if they are 2.5mm2. I'm also taking  a Vernier  gauge to measure the cable diameters and compare to reference tables.

The installation is approximately 30 years old but is in very good condition.
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    Dave,

    the engineers I was talking about regularly used 0 to 1 inch mics with vernier grads to be accurate to within 1/10 thou repeatedly. Off course they were very well practised and constantly checked themselves with slip gauges etc. Acquired skill without using the ratchet although they were sure aware that to standards you officially needed two clicks on the (correctly set) ratchet..



    PS yes these guys did know the difference between resolution and accuracy too. Sadly many today do not

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  • 0
    Dave,

    the engineers I was talking about regularly used 0 to 1 inch mics with vernier grads to be accurate to within 1/10 thou repeatedly. Off course they were very well practised and constantly checked themselves with slip gauges etc. Acquired skill without using the ratchet although they were sure aware that to standards you officially needed two clicks on the (correctly set) ratchet..



    PS yes these guys did know the difference between resolution and accuracy too. Sadly many today do not

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