AC Power Supply Discussion for Ham Shack

[Lightspeed]

an A) from a European perspective:

I’d say its unlikely that the operator would ever be drawing full load from both radios at the same time. As he said in the OP the VHF/UHF radio would be used for permanent monitoring, in which state its current draw would be minimal, typically 1 to 2 A at 13v.

So, lets say his absolute max current draw would round up to 50amps at 13v = 650w

That’s 2.7amps current draw from the UK AC which is delivered at 240v

Assuming a switch mode supply is 80% efficient, that would see it drawing a rounded up (again) 4 amps. From the AC circuit.

So is it essential to run the shack on its own supply line and contact breaker? In terms of current draw for the described operation, no, its not essential. But I’d personally follow best practice and still run a dedicated circuit protected with its own 6a or 10a breaker to the shack.