I need Specsavers too, but I'd say it was the Blue Phase + a Neutral , a switch /RCD has been removed .
As said , terminate them in a Henley Block or remove them.
If,as you say , you don't have great experience with 3Ph , what you're looking at has been divided up into 3 lots of single phase but beware of those Henley's with the R/Y/Blue tapes on. ( And Blue is NOT the neutral in your case )
As said , terminate them in a Henley Block or remove them.
If,as you say , you don't have great experience with 3Ph , what you're looking at has been divided up into 3 lots of single phase but beware of those Henley's with the R/Y/Blue tapes on. ( And Blue is NOT the neutral in your case )