Form 3a- Separation of busbars from the functional units.
- No separation or insulation of busbars.
- Separation of functional units from one another.
- Separation of terminals from the functional units.
- No separation of terminals from others.
Form 3b - Separation of busbars from the functional units.
- Separation of functional units from one another.
- Separation of terminals from the functional units.
- No separation of terminals from others.
Form 3b type 1
- Busbar separation is achieved by insulated coverings: sleeving, wrapping or coatings etc.
| Form 3b type 2
- Busbar separation by metallic or non-metallic rigid barriers or partition.
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