| Type |
Termination |
Busbar Segregation |
| Form 4 Type 2 |
Terminals for external conductors in the same compartment as associated functional unit. |
Busbar separation is by metallic rigid barriers or partition. Cables may be glanded elsewhere. |
| Form 4 Type 3 |
Terminals for external conductors in the same compartment as associated functional unit. |
All separation requirements are by metallic or non-metallic barriers or partitions. The termination for each functional unit has its own integral glanding facility. |
| Form 4 Type 5 |
Terminals for external conductors are not in the same compartment as the associated functional unit, but in individual, separate, enclosed protected spaces or compartments. |
Busbar separation is by metallic or non-metallic rigid barriers or partitions, terminals may be separated by insulated coverings and glanding common cabling chamber(s). |
| Form 4 Type 6 |
Terminals for external conductors are not in the same compartment as the associated functional unit, but in individual, separate, enclosed protected spaces or compartments. |
Busbar separation is by metallic or non-metallic rigid barriers or partitions, terminals may be separated by rigid partitions and glanding common cabling chamber(s). |
| Form 4 Type 7 |
Terminals for external conductors are not in the same compartment as the associated functional unit, but in individual, separate, enclosed protected spaces or compartments. |
All separation requirements are by metallic or non-metallic barriers or partitions. The termination for each functional unit has its own integral glanding facility. |
