民兴电缆, a Dongguan cable manufacturer approved by BASEC — the British Approvals Service for Cables, a UKAS-accredited body — against BS 6387, BS 7846, BS EN 50200 and IEC 60331. Those are the fire-resistance standards a cable must meet to carry a fire alarm or life-safety circuit through a fire, and a BASEC approval is issued and auditable in the UK, which is what makes it checkable from outside China.