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Use a step down transformer 240 primary to 120 secondary. You must know what the connected load (amps) is so that you don't overload the transformer. Small Transformers are rated in VA.

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Q: How can you convert 240v to 120v for ac?
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Can you use a 240V disconnect switch for a 120V AC?

Yes and you will have a spare terminal for future use


Why are you not getting 240v between the two hot wires?

Because they are "in-phase". In order to get 240v, you need two 120v Alternating Current lines that are 180° out of phase, that is, opposite phases. Only when one line is +120v and the other -120v will you see 240v between the wires.


If you put a 60W 120V bulb in a 120V lamp that has a transformer for 240V and plug it into a 240V outlet will it work or blow the circuitry?

Off hand no but your explanations are not clear as to who is doing what to whom,,


What are the two most popular operating voltages for residences?

120v and 240v


Will a diode work as a light dimmer when switched or added in series to an incandescent 120 volt AC bulb?

Actually, I have seen this in a respected electronics magazine (Elektor) quite some time ago: A diode (selected to be capable to handle the amps, the voltage and the heat from the bulb - if placed inside the lighting fixture) is used to "cut off" one half of the AC sine wave and thus sending pulses of 120V to an incandescent light bulb, simulating a simple dimming device. The proposal was meant to run 240V bulbs at 50% of their brightness but I am pretty certain this concept can be used to run 120V bulbs from 240V power. One other way of connecting 120V bulbs to 240V would be to connect two 120V bulbs OF THE SAME WATTAGE in SERIES, so the two bulbs form their own voltage divider. Not sure what happens if one bulb burns out - I would expect the other one to blow too, as a dying light bulb represents zero Ohms (plasma/arcing) for a few milliseconds before it goes dark forever.

Related questions

You are building a new house and trying to decide between 120v and 240v which is better More practical?

In the US, both 120v and 240v will be needed for your home, as different appliances need different voltages. Your TV needs 120V, while your electric dryer and stove will need a 120V/240V supply. If you have an electric water heater, or central AC unit, they will need a 240V supply.


Can you use a 240V disconnect switch for a 120V AC?

Yes and you will have a spare terminal for future use


Will a stepdown transformer which converts 240V AC to 120V AC concurrently convert 50Hz to 60Hz?

T/F works without any change in frequency.... Er. K Godiyal. email: kuldeepgodiyal@gmail.com kuldeep.godiyal@medhaj.com


Can 240V washer run on 120V outlet?

No.


120V light fixtures wall mounted you want to convert to 240V for a house overseas?

It will work it you use 240 volt light bulbs.


What adapters do you need to plug your 240V Ac plug into a 110V AC supply?

You would need a step-up transformer or voltage converter to plug a device with a 240V AC plug into a 110V AC supply. Make sure the converter can handle the wattage of your device and has the correct plug type for your country.


Why are you not getting 240v between the two hot wires?

Because they are "in-phase". In order to get 240v, you need two 120v Alternating Current lines that are 180° out of phase, that is, opposite phases. Only when one line is +120v and the other -120v will you see 240v between the wires.


How can you plug 2000 watts 240v into a 120v 20 amp breaker with out replacing your breaker and all the plugs on the line?

You cannot safely plug a 2000 watt 240v appliance into a 120v 20 amp breaker without risking damage or fire hazard. To use the appliance, consider installing a step-up transformer to convert the voltage from 120v to 240v before plugging it in. This will ensure the appliance operates correctly without overloading the circuit.


If you put a 60W 120V bulb in a 120V lamp that has a transformer for 240V and plug it into a 240V outlet will it work or blow the circuitry?

Off hand no but your explanations are not clear as to who is doing what to whom,,


Can I use 120v 10a 1250 w cable for projector 110-240v power in India?

You can use 120v 10a 125w cable projectors 110-240v power in India.


You have 120v photo flash lights - how do you use them with 240v in Oz?

Power adaptors are readily available that plug into Australia's 240v outlets, converting to 120v. Find them in travel, luggage and electronics stores.


Can you convert a gas dryer 120V hookup to an electric dryer 240V hookup?

No, you cannot convert a gas dryer hookup to an electric dryer hookup. Gas dryers require a 120V outlet for power, while electric dryers need a 240V outlet for power. You would need to install a new 240V outlet specifically for the electric dryer.