It is not illegal for personal use, but you must request it from the energy department before you can use it.
Legal basis:
Article 29 of the “Regulations on Electricity Supervision” If a person engaged in supervisory work of an electric power regulatory agency commits any of the following circumstances, he or she shall receive administrative sanctions in accordance with the law; if it constitutes a crime, be investigated for criminal liability in accordance with law:
(1) Violating relevant laws and relevant regulations of the State Council by issuing a business license electricity;
(2) Discovering the conduct of an electricity exploitation activity without authorization, failing to deal with it in accordance with the law;
(3) Failing to process it in a timely manner after discovering illegal acts or receiving reports of illegal acts;
(4) Taking advantage of itsposition to seek inappropriate interests.