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Working life span of twin; and twin & earth cables.

We have not had a discussion lately about the anticipated working life span of PVC insulated twin; and twin & earth cables lately.

Given that many installations have PVC insulated twin; and twin & earth cables that are now over fifty five years old if we issue a satisfactory EICR with a recommendation to retest after five years the cable will actually be over sixty years old by the date the retest is due.

How much consideration do you give to putting in writing that you consider that sixty year old will still be okay to use?

Andy B.

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0 AJJewsbury over 4 years ago

Some early plastic compositions were not as stable as today

The reverse can also be true ... early PVC cables seemed to have little issue with UV (T&E outside was standard practice for several decades with no apparent problems) - yet some more recent ones seem at lot more vulnerable on that score.

I agree with the consensus though - If a cable is fine after so many years it isn't going to suddenly fail just because it's reached some arbitrary 'best before' date.

- Andy.
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0 AJJewsbury over 4 years ago

Some early plastic compositions were not as stable as today

The reverse can also be true ... early PVC cables seemed to have little issue with UV (T&E outside was standard practice for several decades with no apparent problems) - yet some more recent ones seem at lot more vulnerable on that score.

I agree with the consensus though - If a cable is fine after so many years it isn't going to suddenly fail just because it's reached some arbitrary 'best before' date.

- Andy.
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Working life span of twin; and twin & earth cables.

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