Fuse description

[Chuggy]

Anyone any idea what's protected by a 10 amp fuse marked 'BKUP+B' ?? Car is a Subaru XV

It's the most convenient slot (constant power) for piggybacking a dashcam to.

[E-bmw]

Back Up Sensor & Buzzer.

[Chuggy]

That'll do. Thank you very much. (though I do wonder why it's permanently live.....)

[Chuggy]

Late thought....car has a reversing camera but no backup sensor or buzzer .......??

[E-bmw]

FIIK, it was a guess by the way.

[Chuggy]

Poor joke, my friend and outwith the spirit of PH

[E-bmw]

It wasn't a joke.

You asked if anyone had any idea, I had an idea/guess based on the information given, it was worth a look.