The fundamental reason
behind insulation is to protect user against electric shock and energy hazard. Electrical insulation shall be achieved by using...
- solid/laminated insulating material having adequate thickness and adquate creepage distance
over their surface.
- adequate clearance through air.
- or both.
Insulation needed for the correct operation of the equipment
BASIC INSULATION: Insulation to
provide basic protection against electric shock.
Independent insulation applied in addition to basic insulation in order to ensure protection against electric shock in the event of a failure of the basic insulation.
DOUBLE INSULATION: Insulation
comprising both basic insulation and supplementary insulation.
A single insulation system which provides a degree of protection against electric shock equivalent to double insulation.