In case involving HVAC subcontractor's employee who was injured after the lights went out on the job, summary judgment for defendant general contractor is affirmed over plaintiff's claims that: 1) precedent did not bar his action as defendant retained control of the electrical work; 2) defendant owed a duty to him under Labor Code section 6304.5; 3) defendant's failure to exercise control of safety on the jobsite affirmatively contributed to plaintiff's injuries; 4) defendant failed to fulfill an assumed duty to determine the reason the lights went off previously; and 5) it should have been determined whether a cause of action for negligence per se was included in the action.