I'm looking at installing an AC receptacle for possible future use with a power amplifier. From what I can see on the various equipment vendors' Web sites, most "full legal" amplifiers - and many with output power below that - use NEMA 6-15P power plugs, which have two "hot" prongs with 240 volts across them and then a ground. (There's no neutral, because it isn't necessary.) One way to power the amplifier would be to install a matching NEMA 6-15R receptacle, connected via 14 AWG wire to two 15A circuit breakers on opposite rails at the breaker panel. However, many of these amplifiers say, in their spec sheets, that they may draw up to 14A of power, which is uncomfortably close to the full 15A such a circuit can provide. The wires could get warm, and a surge might trip the breaker! So, I am wondering if it is better to install a NEMA 6-20R receptacle, connected via by 12AWG wire to a pair of 20A breakers. The NEMA 6-15P plug apparently WILL fit into a 6-20R receptacle, because the T-shaped slot in the outlet will accept one of the horizontal prongs of the plug. The thing is, plugging a 6-15P plug into a 6-20R receptacle would only be truly safe, in the event of an overload or short circuit in the amplifier or its cord, IF two things were true. First of all, if the amplifier was built to draw less than 20A, it would need to have a built-in fuse or breaker; secondly, the amplifier's power cord would need to be rated for 20 amps in case a short occurred upstream of the fuse (perhaps in the cord itself). Can folks here with experience with big power amps (I have never owned one that required 240V) tell me if they fulfill those two conditions?