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If it is an alternating current (ac) circuit you could use suitable a step-down transformer.
If the circuit uses direct current (dc) then you could use a drop-down resistor if you know the load's current draw in amps. Then, using Ohms' Law, the value of the resistor in ohms can be calculated.
For example if the current drawn by the 12 volt load is 1 amp, you would need to "lose" 48 - 12 = 36 volts, so, using Ohm's Law (R = E / A) the resistor would need to have a resistance value of 36 / 1 = 36 ohms.
The resistor would have to be big enough to run safely without overheating, so, using the Power Law (W = E x I) its power rating would have to be at least 36 x 1 = 36 watts. That is not a trivial amount of power to dissipate - it's about the same power as a 40 watt electric light bulb - so it would be a good idea to make sure the resistor is mounted in such a way that it can lose its heat safely without burning anything.
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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
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Will a 500volt 50hz squirrel cage motor run on 380volts 50hz?
No, the voltage of 500 volts is too high to operate a 380 volt motor.
How many volts to run a 48 Volt club car electric motor?
If a 48 Volt club car electric motor requires 48 volts, then it should be given a 48 volt power source, or something close to it. Too many more volts and it may burn out; not enough volts and it may not run or it will try to draw too much power and burn out the power supply.
Can you run a 12 volt ac water pump with a 12 volt dc adapter?
No. You need 12 volt AC to run a 12 volt AC motor, not 12 volt DC.
Is it okay to use a 5 volts amp DC power supply with a device that says it needs 5 volts 2 amp?
It looks like the crucial number was left out of the question, between the words "volt ... amp DC". If the device says it needs 5 volts at 2 amp, it will run safely on any DC power supply rated at 5 volts and (2 or more) amps.
Is it safe to run a 220 volt AC to 12 volt DC step down transformer in a 110 volt outlet and will it transform it to 6 volts or will it run at 12 volts?
Since there is an AC to DC converter in there, it's hard to say. If it's a basic transformer to rectifier to capacitor design it will put out 6 volts. If it is a transformer to a voltage regulator it's hard to say what will happen. Certainly the drive voltage to the regularor will be cut in half. It may or may not run, but won't be able to run at 12 volts because there won't be any 12 volts to drive the regulator. (There will only be 6 volts.) If it is a switcher it may work fine or it may do nothing.
Can you operate a 24 volt sump pump with 12 volt battery?
No, you will need two 12 volt batteries connected in series to give the 24 volts necessary to run the pump. It will not run on 12 volts.
A 15 volt battery is connected to 4 lights of the same resistance in a series circuit How many volts of electricity run across each light?
There is a 3.75 Volt drop across each bulb.
Appliances usually run on what volt circuits?
120 volts
Can 240 volt appliances from NZ run on 240 Volts in the US?
yes 240volts is 240 volts
Will a 5 volt computer fan run on 6 volts?
Yes
Can a 110 volt motor run on 240 volts without damage?
No, unless the motor was wound for dual voltage operation, which it will state on the motor nameplate, a 110 volt motor run on 240 volts will be damaged.
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Yes. However, the device me not run at its optimum capacity/speed. Other thing to take into consideration is that the polarity (+/-) of adapter and the receiving device must match.
How do you modify 240 volt appliances to run directly on 12 volts?
You don't.
Can a 12 volt bulb run on 22 volts?
yes, but it may burn out
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Yes, but the 600 volts would have to be transformed down to 480 volts. Direct connection to the motor with 600 volts would overheat the motor to destruction.
Will a 500volt 50hz squirrel cage motor run on 380volts 50hz?
No, the voltage of 500 volts is too high to operate a 380 volt motor.
Can you run a 4.3v device with a 5v power adapter?
Yes, you can run a 4.3v device with a 5v power adapter as long as the amperage of the 4.3 volt device is under the amperage capacity of the 5 volt adapter.
