No, a 15 amp outlet should not be installed on a 20 amp breaker as it may pose a safety risk due to potential overload.
A 20-amp outlet is the maximum amperage rating that can safely handle high-power appliances like air conditioners and refrigerators.
is it polesible to run a range of appliances on a single 15amp receptical
You have a double pole breaker for 240Volt supply. The maximum current is 15 amp.
Technically, they can be on a 15 amp breaker when you use 15 amp outlets. There is a difference. Be sure to check your local code (just call the city building department and tell them you have a code question). some cities require the bedroom outlets to be on an arc-fault breaker.
At the breaker box the black and white will be on a double-pole breaker (or maybe even two separate breakers). To convert to 110V attach the black to a single pole 15 amp breaker, the white to the neutral bus bar (like all the other whites in there) and the ground to the grounding bar (like the other grounds). Then replace the receptacle with a regular 15amp 110V.
A 20 amp circuit with #12 gauge wire will work in any event but if the nameplate recommends a 15 amp circuit then #14 gauge wire on a 15 amp circuit is sufficient. In either case you will have a double pole breaker and your equipment may not require a neutral. Always run a grounding conductor.
It's the amps that are controlled by the breaker not the volts. You can have a 600 volt 15 amp breaker, you can have a 347 volt 15 amp breaker. The breaker will trip when you exceed 15 AMPS.
The minimum size wire a 20 amp breaker needs to be connected to is a #12 wire. The 15 is probably connected to a #14 right now which is only rated for 15 amps. Remember the breaker is sized to the wires ampacity not the load .
If the circuit breaker is in the off position there is no need of overload protection. Overload protection monitors the load amperage, If there is no amperage through the circuit there is nothing to monitor.
Your only hope is that someone wired the box not to code and that there are two wires going into the offending breaker. If you can't separate wires you can't distribute the load.
50 watt equals less than 1/2 amp current flow at 120 volts so you can have 30 light on a 15amp breaker or 40 on a twenty amp breaker.
The key is to ensure that a 15amp breaker has no more than 6 220-240V wall sockets,if more than 6, the extra sockets must be serviced by a different breaker to avoid overloading the D.B