Ok to show I am a decent person, and except your apology..I will explain the Categories for you.
There are 2 categories P & L ( P= property, L= Life) only real difference is sounders can be scaled down in P, but battery backup would be increase to 72 hours.
L1/P1 is to protect all areas within a building with the idea to protect life or property
L2/P1 is to protect all escape routes and any room which opens onto an escape route
L3/P3 is to protect all escape routes and any room which forms a hazzard to the escape route
L4/P4 is to protect all escape routes within the building leading to an exit
L5/P5 is a system which requires special design, not covering any of the above.
With all categories, a risk assessment and fire strategy report may conclude areas of high risk or areas of low risk.
over the years, some I have come across are, detection in public toilets, due to the risk of arson, removal of void detection in 1.5m ceiling, due to the risk being low and not equipment being stored.
Hope this has helped[/QU
You deserve alot of respect from the op for this and you TAZZ are indeed a nice fella.