【Safety Certification】The Insulation Requirement for Live Parts and Metal Parts in Household and Similar Electrical Appliances for CE Marking & EN Certification

Based on IEC/ EN 60335-1, the general requirements for household and similar electrical appliances, the insulation shall be applied to live parts and metal parts to provide protection against electric shock.
 
Do you know the insulation requirement between live parts and different metal parts?
 

• Live Part and accessible earthed metal part (L & A):

Basic Insulation
 

• Live Part and inaccessible unearthed metal part (L & B):

Basic Insulation
 

• Live Part and accessible unearthed metal part (L & C):

Reinforced Insulation
 
Examples of Insulation
The live part L is partially surrounded by a plastic enclosure, partially by air and is in contact with solid insulation. A piece of inaccessible metal is incorporated inside the construction. There are two metal covers, one of which is earthed.

​​[Note] Safety Standard
- IEC/ EN 60335-1
Household and similar electrical appliances – Safety – Part 1: General requirements
 
GCS Safety Team