It depends on the equipment. The nameplate of the appliance should have the appropriate voltage tolerances and frequency requirement. In North America, most appliances will be designed for 60 Hz use. Higher voltage residential appliances are typically rated at 230 VAC. The typical household voltage supplied by the utility is between 220 - 250 VAC (between phase), and 110 - 125 VAC (phase to ground) .
In commercial and multi-family units, it is very common to have 120/208 VAC instead (beyond the scope of this question). Therefore, most ranges, water heaters, air conditioners, heaters, and dryers are designed to operate at 208 VAC as well. You should read the nameplate of the appliance, read the owners manual, and / or consult a licensed electrician if you are still unsure. C. P., Master Electrician
If it does not come with a plug on it, no. If it is made for direct wire, then 99.9% chance is that it is a 240 volt unit. If you plug it into a 120 volt outlet your water will barely get warm.
Nope. Unless you wanna burn up your speaker.
No. First off, the plug will be different. And even if you replace the plug, it won't work right on the wrong voltage
You sure can. It will run a little faster.
No, the plugs are different to prevent this and even if you could the lamp would be very dim.
Yes.
no
Yes
Yes.
If it does not come with a plug on it, no. If it is made for direct wire, then 99.9% chance is that it is a 240 volt unit. If you plug it into a 120 volt outlet your water will barely get warm.
The bulb will be about half as bright.
Yes
Nope. Unless you wanna burn up your speaker.
yes
No, it will cause the bulb to blow. A 12 volt light is DC voltage and your home outlet is AC voltage.
Take the plug in your hand, and insert the plug into the wall outlet.
No. First off, the plug will be different. And even if you replace the plug, it won't work right on the wrong voltage