Can you?
Where in
Schedule 2B are there exemptions for those?
Paragraph 2.
2. Work which—
(a) is not in a kitchen, or a special location,
(b) does not involve work on a special installation, and
(c) consists of—
(i) adding light fittings and switches to an existing circuit; or
(ii) adding socket outlets and fused spurs to an existing ring or radial circuit;
I see no mention of an air conditioning unit there.
And the definition of "special installation".
“special installation” means an electric floor or ceiling heating system, an
outdoor lighting or electric power installation....
Hard to see how an outside security light is not outdoor lighting.
Please remember - Schedule 2B is not a list of what is notifiable, it's a list of what is not notifiable. You start with the position that the work is notifiable, because
everything is notifiable unless exempted, and then you read down Schedule 2B until you find a match which makes what you are doing non-notifiable. If you reach the end without finding a match then it is notifiable.
You will not find that installing any new fixed equipment is non-notifiable, unless it is a pre-fabricated equipment set and associated flexible leads with integral plug and socket connections, and you will not find that an outside security light is non-notifiable.
Equipment attached to an outside wall does not itself comprise an outdoor installation.
It doesn't have to, but it does have to be in Schedule 2B to be non-notifiable.
This is made clear in the Approved Document part P in the additional notes on page 9.
The Approved Document is not the law.
Of course, you have to have a peculiarly pedantic frame of mind to conceive an item that's attached to the outside of an outside wall as still being inside for the purposes of part P.
I'm not trying to conceive anything of the sort. You are the one who seems to think that an outside security light is inside for the purposes of Part P.
And as for the A/C unit it's irrelevant where it is - if it is new fixed equipment, i.e. not a replacement, it does not become exempt via 1a, and if it is not a pre-fabricated equipment set and associated flexible leads with integral plug and socket connections it does not become exempt via 3c, and so you've reached the end of Schedule 2B and not found a classification which makes your A/C unit non-notifiable.
I can think of only one person who would have no difficulty with such a conundrum: BAS.
There is no conundrum, the wording of Schedule 2B is perfectly clear, and quite easy to understand, unless you approach it with the preconceived idea that you so don't want it to say what it does that you'll wriggle and twist and "interpret" it incorrectly until it does appear to say what you want it to.