Electrical circuits and the circuit breakers designed to protect them are rated by how much current they can safely handle. All the different types of plugs and corresponding receptacles exist to ensure that equipment can only be installed on power supplies that can safely handle it. Connecting equipment to the wrong power supply could cause it to become damaged or prevent it from working as the manufacturer intends. That’s why it is extremely important to ensure that you are getting an electrical enclosure from a company that knows what they’re doing.