Have you tested said wart does the job adequately? I've no idea of the load
but if its got any inductance in it then they don't like that very much.
Brian

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The Sofa of Brian Gaff...

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On 02/01/2018 23:17, Robin wrote:
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?

Can you not use a bell transformer? Eg

https://www.tlc-direct.co.uk/Products/TCTR7.html

I could, but I've already got a suitable wallwart