Who may touch the wire: state electrician certification, the trainee route, apprentices, and what an inspector asks your crew for
In one paragraph
California is one of the states where the person on the ladder, not only the company, must be credentialed. Anyone who performs work as an electrician for a C-10 contractor must hold a state certification card, be a registered apprentice in an approved program, or be a registered electrician trainee enrolled in an approved school and supervised one-to-one by a certified electrician. The qualifying person on the license is the exception. This lesson gives the definition that triggers the rule (connecting electrical devices, above 100 volt-amperes), the five certification categories and the hours to sit each exam, what the card costs and how it renews, the trainee path a new hire can start on this month, where apprentices fit, and the enforcement mechanics: a Labor Commissioner referral, a CSLB investigation that must open on receipt, and a presumption of violation the moment your crew cannot produce evidence on site.
The rule
Persons who perform work as electricians, meaning all persons who connect electrical devices for a C-10 contractor above 100 volt-amperes, must be certified by DLSE (Labor Code 108(c), 108.2(a)-(b)); the exceptions are registered apprentices in an approved program (108.2(d)), registered trainees enrolled in an approved curriculum under the direct supervision of a certified electrician who supervises no more than one such person (108.2(e), 108.4(a)), and the C-10's own qualifying person (108.2(g)). Willfully employing uncertified persons or failing to supervise trainees is a disciplinary cause against the C-10 license, and failure to produce evidence of certification or trainee status creates a rebuttable presumption of violation (108.2(h), (j)). The general electrician exam requires 8,000 on-the-job hours; the card expires three years from its effective date and renews on 2,000 hours of work plus 32 hours of continuing education (DIR ECU).
Why it matters
The uncertified helper is the violation you commit in public. Inspectors, Labor Commissioner field staff and competitors can ask any person on your job for a card, and the law says that not producing one is presumed to be your violation, not the worker's. The fix is cheap and fast: a $25 trainee registration, an approved night class, and a one-to-one supervision plan you can actually keep. The cost of skipping it is a referral that CSLB is required to open, on a license that just started paying for itself.