If you are interested in learning more about custom power cables and what to expect from a custom power adapter, consider some advice from experienced people in the field. According to some research, domestic power plugs were invented in the 1880s, and T.T Smith of England is thought to have invented one of the first plugs in 1883. You may be wondering why you are unable to use NEMA power cords in other countries, and why they only work in the U.S. This is because the company that manufactured NEMA cords was created to be used only in North America, at the volts that they service. Some other countries may be borrowing these electrical standards from North America, because they may not have the technology themselves. Custom length power cables can be useful when you are interested in generating more power for your devices from your electrical outlets. The amperage of these cords from custom power cord company professionals could be around 15 amps. You may be interested in using a drop down power outlet as well, which can provide electricity to hard-to-reach places in your home.