【Safety Certification】The Insulation Requirement for Live Parts and Enclosure Openings for CE Marking & EN Certification

The insulation shall be applied to live parts to provide protection against electric shock.
 
Do you know the insulation requirement between live parts and enclosure openings? Please see the following for examples.

• Basic Insulation

- L & B

• Supplementary Insulation

- B & E
[Note]
If the insulation L & B meet the requirements for reinforced insulation, the insulation B & E of supplementary insulation are not measured.

• Double Insulation

- L & E

• Reinforced Insulation

- L & D
- L & F
 
Examples of Insulation
The live part L is partially surrounded by a plastic enclosure containing openings, 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] Reference Safety Standard:
- IEC/ EN 60335-1
Household and similar electrical appliances – Safety – Part 1: General requirements
 
GCS Safety Team