7 ms·

I recommend shorting to ground. Even if it's your own fuse. Shorting means that if you picked the wrong fuse you notice. And when your friend comes by and flips

• wlesieutre 8y ago
  A common solution for this is lockout-tagout, where you physically lock the breaker open using a lock with your name on it, and nobody can flip it until you come back and take the lock off. Used on electrical circuits as well as dangerous machines if you need to climb inside a compactor for maintenance or something. https://www.osha.gov/Publications/3120.html https://www.osha.gov/Publications/3120.html http://www.deenergize.com/?target=Universal_Circuit_Breaker_Lockout_Device_(PSL-CB) http://www.deenergize.com/?target=Universal_Circuit_Breaker_...
  • zaarn 8y ago
    That works too, though IIRC the common procedure in the industry in my country is to use a warning label/shield and hang it on the breaker box during repairs, locking the breaker box itself, then short out the circuit to ground and measure to be sure. Locks on the breaker itself are more rare (usually for low voltage repairs where the common person might frequent the area)