North American standard applies mainly for products used in USA, Canada and Mexico. But also other parts of the world use standards that are based on the North American, with some variations. The North American market is approximately of the same size as the European.
For marketing and sales of electrical equipment to North America product adaptation is of major importance. Product adaptation means complying with valid standards and regulations as well as satisfying the final customer's demand for well-known products and easy access to spare parts. It is also important to recognize product responsibility, something that will strike if you meet misfortune. Try to avoid misfortune by obtaining knowledge and seeking aid from those who have knowledge and experience.
Electrical safety in USA is decided on federal, state, regional and local level. Federal regulations are of general nature and compliance is required. Local regulations can differ between states and regions. Much of the differences are due to different climate conditions etc.
USA and Canada have similar regulations but a CSA approval is not valid in USA and the other way around. There are possibilities in both countries to test a product and achieve for example a CSA(us) approval.
All US flagged ships must have equipment that meets standards developed by US Coast Guard.