- Reference authority
- IEC symbols — OMRON reference glossary
- Programme / market
- International
- Mark type
- Informational symbol
- Artwork access
- See source requirements
- Source checked
- 23 September 2026
What this mark means
A square inside a square identifies Class II electrical equipment with double or reinforced insulation. Use the classification documented for the complete equipment.
Before using this resource
- Use the classification documented for the complete equipment.
- Match the symbol, any accompanying value and the applicable market to the approved product or packaging specification.
- Keep the source reference and selected artwork with the proof for the final reviewer.
A detail worth checking
This is different from an earth terminal symbol or a product certification seal.
Browse everyday packaging symbols
Useful to know
What should I check before using Class II — Double Insulation?
This is different from an earth terminal symbol or a product certification seal. Use the classification documented for the complete equipment.
Does downloading the artwork give me permission to use it?
This image is an identification reference. Use the responsible organisation’s current specification and artwork route for production use.
Curated by GoVisually from published source references. How we maintain the library.
