On 02/01/2018 23:10, wrote:
I need to replace an ancient bell/call box power supply with a modern
wallwart. The original transformer (from the 1930s, with internal fuses
in both L and N) was wired into the lighting circuit. It would be very
difficult to get non-lighting power to this location (near the ceiling,
in the kitchen), I don't have space for a fused spur and I can't find a
13A socket with a built-in fuse. I'm planning on using a standard 13A
socket, fitting an internal 500mA in-line fuse and adding a suitable
label to the socket.
What does the jury think?

Nothing wrong with it in principle. A 3A fuse would probably be more
useful.

You could also look at 2A plugs/sockets if you can't find a
PSU/transformer that can be wired directly. e.g:

https://www.tlc-direct.co.uk/Products/CB7046.html

Having said that, you can get neat bell transformers that can be wired
directly. What is it to power? Do you need DC or is AC ok?

--
Cheers,

John.

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