As I understand it, Proteus mark their bidirectional devices with two arrows in opposite directions. Not a bad idea for implementing in the product standard.  

As I understand it, Proteus mark their bidirectional devices with two arrows in opposite directions. Not a bad idea for implementing in the product standard.  

Proteus are doing a few good things recently, they are one of the few Makers who do a Type B RCD, I was looking for a F or B type this week, Hager dont seem to do them, well, some old webpages point to them, but not available in the UK.

On a similar subject, if we need to fit a type B, but the Maker doesnt make one, would it be ok to fit into an existing board, so long as busbar and front openings fit correctly?

Or, do we have to put in a separate, different make, CU to supply the one item that requires the Type B or F RCD? Making the intake cupboard look a real mess with an extra CU there, when there are plenty of spare ways in the existing CU.