Electrical query: Will home appliances designed to work on voltage of 110V work on 240V supply?

[hafeezrocks]

For examples, the standard voltage in United States is 110 Volts and thus the appliances are designed to work on the 100 Voltage rating.

Now if the same appliances are used to operate on standard voltage rating of 220-240 Volts in Pakistan, what will be the impact on the working and efficiency of the appliances?

Will the appliances like a Bulb, Dishwasher, Electric Fan, Refrigerator , LED Television still operate smoothly or will they get burnt out or draw more current or draw more power or won't start at all?

Expecting an answer on the impact of current and Power drawn by the appliances.

Any Electrical engineers or ones with interest in electricity can help.

 

[Robert]

No.

When I was in construction we used to switch from 220V to 110V tools on site.

You need a step-up or step-down transformer between supply and motor.

 

[Syed1]

A lot of appliances are rated for 120-220 volts and have a built in stepdown transformer, but smaller ones like cordless phones, bulbs and hairdriers etc only operate at 120 or 220.

 

[hafeezrocks]

No.

When I was in construction we used to switch from 220V to 110V tools on site.

You need a step-up or step-down transformer between supply and motor.

Thanks but what will happen if the appliances are run on higher voltages?

Will higher voltages draw more current and Power and thus burn the device?

 

[hafeezrocks]

A lot of appliances are rated for 120-220 volts and have a built in stepdown transformer, but smaller ones like cordless phones, bulbs and hairdriers etc only operate at 120 or 220.

Yeah for example the Mobile Chargers have Step Down transformers and rectifier which step down the voltage to 5 V and then convert it into DC.

But with bigger devices with no Step Down facilities, will higher voltages lead to more current and more power consumption ( P = VI) and hence they are unsafe to use?

Will the appliances designed for 240 Volts Supply ( Pakistan ) run at standard rating of 110 Volts?

 

[Syed1]

Yeah for example the Mobile Chargers have Step Down transformers and rectifier which step down the voltage to 5 V and then convert it into DC.

But with bigger devices with no Step Down facilities, will higher voltages lead to more current and more power consumption ( P = VI) and hence they are unsafe to use?

Will the appliances designed for 240 Volts Supply ( Pakistan ) run at standard rating of 110 Volts?

From my experience if something is rated for higher voltage and you provide lower voltage then the operation is compromised like a fan wouldn't run as fast as you want or an AC won't cool enough (or barely anything)


BUT


if something is designed for lower voltage and you provide higher voltage, then you will short it.

 

[Yossarian]

Thanks but what will happen if the appliances are run on higher voltages?

Will higher voltages draw more current and Power and thus burn the device?

**** DANGEROUS ****

Depending upon the appliance, it could short circuit, burn, cause electric shock, run too fast or become dangerous in some other way.

Unless it has a built in transformer resulting in the appliance being able to be used on both 110 volts and 240 volt supplies (either automatically or by changing a switch setting on the appliance) then you are potentially risking lives by plugging a 110 volt device into a 240 volt power supply.

 

[Robert]

Thanks but what will happen if the appliances are run on higher voltages?

Will higher voltages draw more current and Power and thus burn the device?

Well, I would imagine that the device would pull too much current, and if it were not protected by a fuse or RCD, would burn out and catch fire. Applying Ohm's Law, the voltage would double, resistance stay the same and so the current would double too.