What Class Code 5190 Covers
WCIRB Class Code 5190 covers electrical wiring installation in commercial and industrial buildings — offices, warehouses, manufacturing facilities, retail centers, hospitals, schools, and government buildings. This includes licensed C-10 electrical contractors performing new construction wiring, tenant improvement electrical, panel upgrades, conduit installation, and electrical system integration in non-residential structures. The code covers journeyman electricians, apprentices, and working forepersons on commercial job sites.
Residential electrical work — wiring single-family homes, condominiums, and small apartment buildings — is classified under a different code (5191). Contractors who perform both commercial and residential work must split payroll between 5190 and 5191 on their workers comp policy. The distinction matters because residential electrical work has a different (lower) WCIRB rate, and misapplying the commercial rate to residential payroll results in premium overpayment.
Industrial electrical work — high-voltage installations, motor control centers, switchgear, industrial control systems — is also included in 5190, though some specialty high-voltage work may require specific underwriter review. The $5.38/100 rate is elevated compared to general construction because of the unique severity of electrical injuries, particularly electrocution and arc flash events, which can be fatal even in small voltage exposures.
Who This Code Applies To
Journeyman electricians (IBEW and non-union), apprentice electricians, master electricians who perform field work, electrical foremen working alongside their crews, low-voltage installers when employed by C-10 contractors, and solar panel electricians doing grid-tie installations all fall under the 5190 classification. C-7 (low-voltage systems) contractors doing data cabling, security systems, or AV installations may have a different applicable code — the C-10 commercial electrical code specifically covers power distribution wiring.
Working owners of electrical contracting companies who perform field work are coded 5190 unless excluded from coverage. Given the relatively high rate and often high salary of working electrical contractors, owner exclusions can represent meaningful premium savings — especially for sole proprietors who carry workers comp primarily to satisfy GC requirements.
Electricians who work on both commercial and residential projects present a common payroll split challenge. Accurate time tracking by project type is required to maintain the split at audit. Many carriers will accept a good-faith payroll allocation based on estimated percentages of revenue or hours by project type if exact records aren't kept — but be prepared to document that estimate.
WCIRB Advisory Rate and Premium Calculation
At $5.38 per $100 of payroll, commercial electrical wiring generates substantial workers comp premiums for contractors with significant field payroll. For a 10-person commercial electrical crew averaging $80,000 in annual wages:
- Total commercial electrical payroll: $800,000
- Manual premium: ($800,000 ÷ 100) × $5.38 = $43,040
- With 0.95 ex-mod (credit mod): $43,040 × 0.95 = $40,888
- After 8% schedule credit: $37,617
- Carrier LCM range (0.90–1.05): approximately $33,855–$39,498
- Plus CA surcharges (~3.5%): approximately $35,040–$40,880 total
A contractor who successfully separates office staff payroll (8810, $0.15/100) and achieves a split between commercial (5190) and residential (5191) where applicable can reduce their effective blended rate significantly — potentially saving $15,000–$25,000 annually on a $1M payroll operation.
Common Misclassification Scenarios
Applying 5190 to residential electrical work. An electrical contractor doing new home wiring on a residential subdivision should be coded 5191, not 5190. If a contractor does 60% residential and 40% commercial but codes all payroll as 5190, they're overpaying the commercial rate on $600,000 of residential payroll — a meaningful annual cost.
Low-voltage / data cabling employees coded as 5190 electricians. Employees who exclusively run Cat6 cable, install access control systems, or set up AV equipment typically do not carry the same electrocution exposure as power electricians. Depending on their scope of work and employer classification, a lower-rated code may apply — this is a nuanced area that benefits from WCIRB guidance or a formal classification survey.
Solar installation workers coded as 5190 when they qualify for a different code. Solar panel installation has specific WCIRB classification considerations, particularly for roof-mounted residential solar. Some solar work falls under 5190; some may fall under roofing or a specific solar installation code. The distinction matters because 5190 is not the highest-rate code — and misclassifying residential rooftop solar under a commercial electrical code, or vice versa, creates premium discrepancies.
Foremen who transition primarily to supervisory roles still coded as journeymen. A master electrician or foreman who has largely stopped performing hands-on electrical work and now focuses on project coordination, estimating, and site oversight may qualify for a split or reclassification. Document the transition and discuss with your broker before renewal.
Underwriting Considerations
Commercial electrical contractors are underwritten with significant attention to lockout/tagout (LOTO) program compliance. Cal-OSHA requires documented LOTO procedures for any work on energized systems — underwriters ask for this documentation and its absence is an immediate underwriting red flag that triggers declination or surcharge.
Height work is the second major underwriting concern. Electrical contractors routinely work on lifts, scaffolding, and ladders — carriers require documented fall protection programs and may ask for aerial lift operator certification records. For contractors doing work above 15 feet regularly, lack of documented fall protection training is a significant underwriting debit.
Arc flash protection — documented NFPA 70E training and PPE compliance — is increasingly a requirement for industrial electrical work and is becoming a standard underwriting inquiry for all commercial electrical accounts. Contractors with documented arc flash training programs receive better schedule ratings from sophisticated underwriters.
Loss history drives eligibility for preferred carriers. Electrical contractors with a single fatality on their record — even years in the past — will face restricted market access and significantly elevated pricing for three to five years following the event. Electrocution fatalities are high-visibility claims that affect carrier relationships beyond the standard three-year experience modification window.
Typical Injury Types
Electrocution and electrical contact injuries are the defining severe risk of this classification. Even low-voltage contact (120V) can cause cardiac arrest. High-voltage contact produces catastrophic, often fatal injuries. The frequency is low relative to musculoskeletal injuries, but each electrocution event is both a catastrophic claims loss and a regulatory investigation event.
Falls from height — from ladders, scaffolding, aerial lifts, and through unguarded floor openings — are the most frequent source of serious injuries. Falls account for a disproportionate share of fatal and permanently disabling claims in the electrical trade.
Musculoskeletal injuries from cable pulling, conduit bending, carrying heavy equipment, and working in overhead and awkward positions are high-frequency and often result in multiple weeks of temporary disability. These injuries drive the claims frequency component of the WCIRB rate.
Eye injuries from arc flash events, flying metal chips during conduit work, and chemical splash from battery systems require attention — particularly as more commercial electrical work involves working around UPS systems and battery storage installations.
Risk Mitigation
- NFPA 70E Arc Flash training and documentation: Annual arc flash training with signed acknowledgment records is both a safety best practice and a specific underwriting credit item. Ensure PPE requirements are documented and enforced — arc-rated clothing, face shields, insulated gloves by voltage class.
- Documented LOTO program: Written lockout/tagout procedures for every energy source type your crews encounter. Equipment-specific LOTO procedures should be posted and crews should be trained. Regulatory compliance here is also a meaningful underwriting credit.
- Fall protection plan: A written fall protection plan that addresses all types of elevation work — ladders, scaffolding, aerial lifts, and roof access. Require aerial lift operator certification and maintain records. Cal-OSHA's Construction Safety Orders are the governing standard.
- Electrician apprenticeship program participation: IBEW apprenticeship programs have structured safety training curricula. Union electrical contractors often demonstrate better safety records than non-union shops — some carriers recognize this with schedule credits for apprenticeship program participation.
- Job hazard analysis (JHA) for each project: Require foremen to complete a written JHA before each significant project phase. This practice demonstrates proactive safety culture to underwriters and creates documentation that can help in the event of a Cal-OSHA inspection.
Carriers Active in This Class
Commercial electrical contractors with clean loss histories have access to a competitive admitted market. ICW Group is one of the most active California carriers in the electrical trade, with construction-specialist underwriters and competitive pricing. The Hartford, Liberty Mutual, and Travelers actively write commercial electrical — Travelers in particular tends to focus on medium to large operations with strong safety programs.
IBEW union electrical contractors may have access to the IBEW's own workers compensation trust programs, which offer specialized claims management and competitive rates for union shops. Confirm with your broker whether trust participation is available and cost-effective relative to the admitted market.
For electrical contractors with elevated ex-mods (1.25+), or with recent significant claims, admitted carrier options narrow. Applied Underwriters, Berkshire Hathaway Homestate, and E&S specialty markets serve this segment. State Fund remains the market of last resort with no restrictions on ex-mod.