In order to keep everything safe there are some nice standards for electrical connections. It is almost impossible for example to connect a 110v plug to a 240v socket. The different voltages and amperages are all colour coded, have mis-matched keyways, and are different in size. However never assume wiring has been done to the standard and double check that you're connecting what you think you are.

In order to keep everything safe there are some nice standards for electrical connections. It is almost impossible for example to connect a 110v plug to a 240v socket. The different voltages and amperages are all colour coded, have mis-matched keyways, and are different in size. However never assume wiring has been done to the standard and double check that you're connecting what you think you are.

Ohms law can help you work out your requirements if your not sure.

Joule's law can help you work out your requirements if you're not sure.