It doesn’t take long before a 20A 120V circuit starts to seem small. In this article series, we will take a look at several next steps.
A Word About Safety
Electricity can be dangerous. In addition to shock potential, electricity can also be a fire or arc flash hazard, particularly as voltage or available current increases. This article discusses commonly accepted electrical practices, but is far from exhaustive in its scope or treatment. When approaching an unknown electrical service, do not assume that it is correctly wired or in working order. You must test it. A procedure for testing standard 120V 20A receptacles can be found here.
Any distribution equipment must be constructed to the standards of the regulating authorities in your area (The NEC and/or listing agency such as the UL in the case of the US); and some localities require that all equipment be UL or ETL listed for use; precluding homemade equipment.
This article is based on the US power system design and regulations...
