3 Protection use Class equipment equivalent insulation
(see Figures 5.
This insulation shall equivalent basic plus supplementary insulation.FUNDAMENTAL RULES FOR PROTECTION AGAINST ELECTRIC SHOCK 47
Protection without automatic disconnection supply measures without application of
protective conductors (PE)
The most common protective measures without automatic disconnection supply are:
- protection the use Class equipment,
- protection electrical separation.
Protection shall foreseen by:
- the use Class equipment (identified the symbol ).2.11)
This measure the most recommended one for electrical equipment, particular for
domestic appliances.2.10
Principle diagrams for Class equipment; three examples and symbol
1 basic insulation
2 internal metal part
3 supplementary insulation
4 outside metal part
5 reinforced insulation
.2.2.
Figure 5.10 and 5.
5.
- supplementary insulation applied electrical equipment having basic insulation only,
- reinforced insulation applied uninsulated live parts
