gareth magennis wrote:

So what would be the maximum voltage drop you might expect from a non
overloaded mains system?

Crikey. I know where I'd test with a highish power PA rig, the local venue that
has some 5kW ? or so of amps but last year I had a separate 32A circuit run in
just for the amp rack so I doubt it would be more than a few volts.

Graham