California Code, Public Utilities Code - PUC § 7720

(a)(1) When an appropriate prosecuting agency determines that any person has engaged in, is engaging in, or is about to engage in, any acts or practices which constitute, or which shall constitute, a violation of any provision of this chapter or of any rule, regulation, permit, covenant, standard, requirement, or order issued, promulgated, or executed pursuant to this chapter, the city attorney or district attorney of the jurisdiction in which these acts or practices have occurred, are occurring, or shall occur, or the Attorney General, may make application to the superior court or to the commission for an order enjoining these acts or practices or an order directing compliance with this chapter.

(2) A temporary restraining order, preliminary or permanent injunction, or other order may be issued under this subdivision upon a showing that any person has engaged in, is engaging in, or is about to engage in, the acts or practices set forth in paragraph (1).

(1) That irreparable damage shall occur should the relief sought not be granted.

(2) That the remedy at law is inadequate.