The guys who ran the lighting gallery in my school hall found that the fuses kept blowing, and eventually solved this by getting a piece of copper rod of the right thickness from the physics lab, cutting off fuse-length pieces and using these to replace the fuses. Worked perfectly, they could turn all the lights on (eg for the last scene of the school play) and no fuses blew.
Now the thought of that has me worried. What happens when fuses don't blow? The cables tend to go on fire because no fuses = overcurrent = heat.
I know what would have happened to these guys if I had been a sparkytrician there, they would not have been employed in any capacity for much longer.