Insulating barriers of class II too

Insulating barriers of class II tools, and parts of class II tools which serve as supplementary insulation or reinforced insulation, and which might be omitted during reassembly after servicing, shall either:– be fixed in such a way that they cannot be removed without being seriously damaged; or− be so designed that they cannot be replaced in an incorrect position, and that, if they areomitted, the tool is rendered inoperable or manifestly incomplete.Compliance is checked by inspection and by manual test.Servicing includes replacement of components such as supply cords and switches.This requirement is met if the barrier is so fixed that it can only be removed by breaking or cutting.Fixing by means of rivets is allowed, provided that these rivets need not be removed when replacing the brushes, capacitors, switches, non-detachable flexible cables and cords and the like.Fixing by means of an adhesive is only allowed if the mechanical strength of the joint is equal to that of the barrier.An adequate internal lining of insulation material, or an adequate internal insulating coating on metal enclosures, is considered to be an insulating barrier provided that the coating cannot easily be removed by scraping.For class II tools, a sleeve on an insulated internal conductor, other than the core of an external flexible cable or cord, is considered to be an adequate insulating barrier, if it can only be removed by breaking or cutting, or if it is clamped at both ends.Ordinary lacquering on the inside of metal enclosures, varnished cambric, flexible resin-bonded paper, or the like are not considered to be insulating barriers.