531.3.5.3.2.201
For Class I enclosures in TT systems where RCD protection is used on outgoing circuits, double or reinforced insulation of all live conductors (incoming cables, extension terminals, etc.) on the supply side of the incoming device, e.g. main switch, shall be used. Insulated and non-metallic sheathed cables are deemed to meet the requirements of double or reinforced insulation.
NOTE: Consideration should be given to the manufacturer's internal live interconnecting cable links on the supply side of an RCD being double insulated, having reinforced insulation or equivalent mechanical protection.
531.3.5.3.2.201
For Class I enclosures in TT systems where RCD protection is used on outgoing circuits, double or reinforced insulation of all live conductors (incoming cables, extension terminals, etc.) on the supply side of the incoming device, e.g. main switch, shall be used. Insulated and non-metallic sheathed cables are deemed to meet the requirements of double or reinforced insulation.
NOTE: Consideration should be given to the manufacturer's internal live interconnecting cable links on the supply side of an RCD being double insulated, having reinforced insulation or equivalent mechanical protection.
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