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Roger Hayter[_2_]

ARW 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?

Why would you want a non lighting power source?

Why would you want a socket with a 3A fuse in it if the wallwart is
designed to fit a 13A socket?

Am I just missing something?

Why not just fit a 13A socket from the existing power supply, plug your
wallwart into that and be done with it?

I agree. The wiring to the socket is protected by the MCB and it is the
wall wart's job (if even vaguely reputable) to protect its own 240V
components as well as the ElV side.

--

Roger Hayter