The standard length of a hookup cable or extension cable is 25 metres which should be enough to reach the electricity point from your pitch. If your pitch is closer, do not coil the excess cable, as a coiled cable acts as a heating element.

What amp is mains electric?

Most homes have an electrical service of between 100 to 200 amps. Amperage is a measurement of the volume of electricity flowing through wires, and this measurement can vary between 30 amps in very old homes that have not been updated to as much as 400 amps in a very large home with extensive electric heating systems.