Instruction manual

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Page 8
1M
Technical Information
Continued
CLASS 2 (Double Insulated) CONSTRUCTION
(Double insulated equipment)
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This method of construction employs two safety barriers comprising two layers of
insulation between dangerous voltages and the user of the equipment.
The first layer of insulation is formed around the live conductor and is termed ‘the
Functional Insulation’.
The second layer of insulation is termed ‘the Supplementary Insulation’. In Class II
equipment, protection against electric shock does not rely on
basic insulation only, but has additional supplementary
insulation such as double insulation or reinforced insulation
provided, there being no reliance on precautions in the fixed
wiring of installation.
Class II equipment is marked with the words "DOUBLE
INSULATION" or the symbol
For double insulated under Safety Symbols:
Note 1 – Double Insulation is insulation comprising both basic and supplementary
insulation.
Note 2 – Reinforced Insulation is a single insulation system with a degree of protection
against electric shock, which is equivalent to double insulation.