The use of SY cable is "discouraged" within BS7671:2018+A2 2022 On Site Guide Section 7.9, as generally it is not manufactured to a British or Harmonized standard.
It is not rated for external use or for use in ducts. It's normally classed as a control cable rather than a power cable.
On an EICR it should be recorded as a non-compliance.
 
I dont understand why it is so popular, i have even seen it used on a 350KVA generator for power.
Its horrible, whenever you touch the screen, which i would only earth one end anyway, its expensive for what it is and there are better cables for all the uses we come across. I think its toughness is an illusion and its outdoor performance is shocking. However, unless it has damage, i would C3 it as there are better products out there, that will last and perform better under most circumstance
 
Depending on the size of the company, ie, has a H&S department or H&S. I'd just use the phrase that's it's not compliant with BS standards and insurance would likely not cover any incident arising from its failure. Whether that 2nd part of the statement is true or not I wouldn't know. But it may start the conversations along the lines if "what if he's correct and we have a fire or death".

My last company with 30,000+ employees would have started a switch out programme on a phrase like that. Quite proactive to be fair to them. One guy cut himself badly stripping a cable with an electricians knife, next week they were banned and a bunch of new bespoke tools appeared that couldn't get you.

Depends on the company you work for I guess. I'd emphasise the poor workmanship items over the construction of the cable in conversation. Like the glanding, poor terminations, etc. and back it up with a mention of the outdoor cable being close to failing being non BS approved.
 

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SY cable on EICR again ....
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Periodic Inspection Reporting & Certification
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lozarus,
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