Busbar separation is achieved by metallic or non-metallic rigid barriers or partitions. Terminals are separated from the busbars, but not from functional units or each other.
Form 4 Type 2
Busbar separation is achieved by metallic or non-metallic rigid barriers or partitions. Cables are terminated within the same compartment as the functional unit. Cables are glanded elsewhere, e.g. in a common cabling chamber.
Form 4 Type 5
Busbar separation is achieved by metallic or non-metallic rigid barriers or partitions. Terminals are external from the functional unit compartment and separated by insulated coverings, e.g. PVC boots. Cables are glanded elsewhere, e.g. in a common cabling chamber.
Form 4 Type 6
All separation is achieved by metallic or non-metallic rigid barriers or partitions. Terminals are external from the functional unit compartment and enclosed in their own compartment by means of rigid barriers or partitions. Cables are glanded elsewhere, e.g. in a common cabling chamber.
Form 4 Type 7
All separation is achieved by metallic or non-metallic rigid barriers or partitions. Terminals are external to the functional unit compartment and enclosed in their own compartment by means of rigid barriers or partitions complete with integral glanding facility.
