NEC 422.12 mandates that central heating equipment must be supplied by?

The requirement stated in NEC 422.12 specifies that central heating equipment must be supplied by an individual branch circuit. This is crucial for ensuring that the heating equipment receives adequate and dedicated power to operate efficiently and safely without being affected by other loads on a shared circuit.

Using an individual branch circuit minimizes the risk of overloading the circuit since the heating equipment will not have to share its supply with other devices. It also allows for easier troubleshooting and maintenance, as the heating system will be isolated from the influence of other appliances, which can help in identifying potential issues more effectively.

Overall, the implementation of individual branch circuits for central heating equipment supports compliance with safety standards and enhances performance reliability in residential and commercial setups.