100v,115v versus 230v
https://www.asc.ohio-state.edu/physics/p616/safety/fatal_current.html . |
** Note: The Quick 220® Power Supply uses two outlets from two different circuits that are out of phase and not controlled by ground fault interupters (GFI’s). The Quick 220® Power Supply has built in circuitry to test for the out of phase circuits. A separate tester is supplied to check the outlet for a GFI. Most buildings have numerous outlets that meet these two requirements.https://www.quick220.com/-A220-15D.html Note the two power cords hardwired, connected, to the converter. ** Note: The Quick 220® Power Supply uses two outlets from two different circuits that are out of phaseTherein one 120V wall outlet fed from Line 1 to neutral and one 120V outlet fed from Line 2 to neutral. Difference of potential, voltage, between Line 1 and Line 2 = 240V nominal. . |
P = I x E P = Watts, Volt-amps. I = Current, Amps. E = Voltage. Will a 240V 1500 watt space heater connected to a 240V source produce more heat than a 120V 1500 watt space heater connected to a 120V source? No..... Current, amps? P / E = ? 1500W / 120V = 12.5 amps. 1500W / 240V = 6.25 amps. A 120V 20 amp branch circuit is capable of supplying up to 2400 watts continuous power. The same branch circuit will supply short spurts, draws, of well over 2400 watts all day long without causing the 20 amp circuit breaker to trip open. If voltage drop is an issue, or concern, use #10awg branch circuit wiring. Unless a piece of equipment, like a monster power amp, consumes more than 1440 volt-amperes continuous power it’s a violation of US electrical safety code to install a 240V branch circuit and receptacle in a US residential dwelling. I doubt any manufacturer builds a home consumer sold amp for use in the US that is rated at more than 1440 watts, volt-amps, continuous power. They know the power cord plug needs to have a 5-15P 120V 15 amp plug if they want to sell the amp to a US home consumer. NEC 210.6 Jim. |
glupson6,016 posts @ glupson but I have a few unused ones, too. I have nothing to plug into them (except the tuntable that would then be too far so no need anyway),Just a guess the "unused ones" were installed at the time for "220V" window air conditioners. How does it go in real life? In the U.S.A., I have usual 110V outlets, but I do have a few 220V (240?), too.There is a good chance if you measured the voltage at your 110V outlets it is closer to 120V than 110V. What ever it measures the hot Line 1 to hot Line 2 voltage at the electrical panel will/should measure twice that. Example: Hot Line to neutral, 110V. Hot Line 1 to hot Line 2 will measure 220V. Audio equipment that has dual voltage primary windings power transformer will still output the same secondary winding(s) voltage and exactly the same volt-ampere rating(s). The only thing that could influence the performance of say a power amp would be Voltage drop on the mains if a 120V branch circuit is used verses a 240V branch circuit. Possibly another reason, for here in the US, if 240V mains power is used it basically could be considered balanced power, 120V - 0V - 120V. As for this: stefano_f1 posts @ stefano_f The frequency has nothing to do with whether the voltage is 230-240V or 110-120V. The frequency is determined by the Utility Power Company’s generating plant. https://www.worldstandards.eu/electricity/plug-voltage-by-country/ Jim. |
I’m moving to USA soon ,planning to take all my gear with me do not want sell my we91 amplifier which is 240 volt that’s why raise the question , in my humble opinion audio equipment regardless of how hungry or not performs better 240 volt operation. I doubt any audio equipment designer/manufacturers would agree with you that feeding their equipment 240Vac is better than 120Vac for the sound from their audio equipment. UK power. https://en.wikipedia.org/wiki/Ring_circuit The power system in the UK used in residential housing would not meet electrical safety codes in the US. The UK power system is a grounded "Power System". It has a Grounded Conductor, Neutral Conductor, and an "Ungrounded Conductor", the Hot Conductor. How and where the service neutral conductor is connected to mother earth in the UK is different than where it is connected to earth here in the US, from what I understand. Residential electrical services in the US are fed from a single phase step down transformer. The output secondary winding is called a Split Phase Winding. The single phase 240V winding has a center tap in the middle of the winding. The center tap leg is called the neutral. When connected to mother earth it becomes the Grounded Conductor. The output voltage of the split phase winding is 120/240Vac or 240/120Vac, nominal. Two Hot Ungrounded conductors and one Grounded conductor will feed the electrical service of the residential dwelling. How does a 120/240V single phase split phase winding work? Here is a good video on how it works. https://www.youtube.com/watch?v=eVamt9IdQd8 Your problem if you plan on feeding your 230V audio equipment from the 240Vac mains power here the US, in the UK the 230V power has a neutral and a hot conductor + EGC (Equipment grounding Conductor). Here in the US the 240V mains are both Hot ungrounded conductors. 120V 0V 120V. The internal safety fusing for audio equipment is only on the Hot Line. The neutral Line is not fused. Which is correct when the equipment is fed from AC mains that use a neutral and hot conductor, as is the case in the UK and 120V mains here in the US. Not the case for US 240V mains power. Both 240V ungrounded Lines should be fused. . |
ditusa133 posts It sure does! 7. IEC Power Cord Receptacle.I noticed it has a Switched Mode Power Supply. Why the designer/manufacturer recommends 230Vac? Maybe to eliminate the possibility of AC Line voltage drop. It would be interesting to see a schematic wiring diagram of the power supply of the amp. . |
