- What Is SC-RSC-EL, Exactly?
- Who Runs the Exam: LLR, the Commission, and PSI
- Exam Format: Questions, Time, and Passing Score
- The Nine Domains You'll Be Tested On
- The Companion Business Management and Law Exam
- Fees and Costs to Expect
- Eligibility and Application Requirements
- Open-Book References Allowed at PSI
- Who Actually Needs This License
- Preparing for SC-RSC-EL Without Wasting Time
- Frequently Asked Questions
- SC-RSC-EL is South Carolina's PSI trade exam for the Residential Electrician (RBE) specialty license, not NASCLA.
- The trade exam has 60 scored questions, a 180-minute limit, and requires 44 correct (73.3%) to pass.
- Services, Feeders, and Branch Circuits carries the most weight at 15 questions; General Electrical Knowledge follows at 13.
- A separate Business Management and Law exam (50 questions, 120 minutes, 34 correct to pass) is also required.
What Is SC-RSC-EL, Exactly?
SC-RSC-EL refers to the South Carolina Residential Specialty Contractor Electrical Exam - the state-specific trade examination that candidates must pass to hold the Residential Electrician (RBE) license classification in South Carolina. This is a licensed residential specialty contractor credential, and it is distinct from the alternative NASCLA electrical examination pathway and from any commercial electrical credential. If you're researching this exam, you're preparing for PSI's South Carolina Residential Electrical trade exam specifically, not a national or commercial-scope test.
This distinction matters because the acronym gets reused elsewhere for unrelated credentials. Everything on this site - question counts, fees, references, and rules - reflects the actual South Carolina residential electrical licensing exam administered through PSI Services LLC on behalf of the state's licensing commission.
Who Runs the Exam: LLR, the Commission, and PSI
The South Carolina Residential Builders Commission, operating under the Department of Labor, Licensing and Regulation (LLR), sets licensure policy for residential specialty contractors, including electricians. LLR handles applications, credentials review, and license issuance. Once the Commission approves an applicant, PSI Services LLC - the testing provider - schedules and administers both required examinations at its test centers.
This two-agency structure means your paperwork goes through LLR first. Commission approval must happen before PSI will let you schedule a seat. If you want the full walkthrough of documents, affidavits, and timing, see the dedicated SC-RSC-EL Requirements guide.
Exam Format: Questions, Time, and Passing Score
The SC-RSC-EL trade exam consists of 60 scored multiple-choice questions with a 180-minute time limit. To pass, you need 44 correct answers, or 73.3%. PSI may also insert 5 to 10 unscored pretest questions into your session; time spent on those pretest items doesn't count against your 180-minute clock, but you won't know which questions are pretest and which are scored, so every question deserves your full attention.
The exam is computer-delivered at a PSI test center and is open-book, meaning you can bring approved printed references with you - more on what's allowed in a later section.
Key Takeaway
Budget your 180 minutes across 60 questions deliberately - that's roughly 3 minutes per question, but code-lookup questions on Services, Feeders, and Branch Circuits or Grounding and Bonding may take longer than pure recall questions.
For a deeper breakdown of exactly what 73.3% means in practice and how missed questions add up, read the SC-RSC-EL Passing Score guide. And if you're wondering how this compares against candidates who've already sat for it, check the SC-RSC-EL Pass Rate data.
The Nine Domains You'll Be Tested On
PSI's official candidate bulletin breaks the trade exam into nine content domains, each with a fixed question allocation. Knowing these weights lets you prioritize study time where it actually pays off.
| Domain | Topic | Questions |
|---|---|---|
| 1 | General Electrical Knowledge | 13 |
| 2 | Services, Feeders, and Branch Circuits | 15 |
| 3 | Overcurrent Protection | 5 |
| 4 | Grounding and Bonding | 6 |
| 5 | Conductors and Cables | 5 |
| 6 | Raceways and Boxes | 4 |
| 7 | Lighting | 4 |
| 8 | Specialty (pool/spa, garages, generators, wheelchair lifts) | 4 |
| 9 | Safety | 4 |
Domains 2 and 1 together account for 28 of the 60 scored questions - nearly half the exam. That's why most successful candidates spend disproportionate time on services, feeders, branch circuits, and general electrical knowledge before moving to the smaller domains.
Domain 2: Services, Feeders, and Branch Circuits
The single largest domain at 15 questions. Candidates need fluency in service entrance sizing, feeder calculations, branch circuit requirements, and load calculations as they apply to residential dwellings under the 2017 NEC.
- Service and feeder conductor sizing methods
- Branch circuit rating and load requirements for dwelling units
- Voltage drop and demand factor considerations
Domain 1: General Electrical Knowledge
At 13 questions, this domain covers foundational electrical theory and code application that underpins the rest of the exam.
- Basic circuit theory, definitions, and terminology used throughout the NEC
- Code organization and how to navigate the 2017 NEC quickly under time pressure
- General application rules that show up again inside more specialized domains
The smaller domains - Overcurrent Protection, Grounding and Bonding, Conductors and Cables, Raceways and Boxes, Lighting, Specialty topics, and Safety - carry between 4 and 6 questions each. Don't skip them; a candidate who ignores five small domains is effectively giving up 27 of 60 points. For a full topic-by-topic breakdown of every domain, the SC-RSC-EL Exam Domains Guide covers all nine areas in depth.
The Companion Business Management and Law Exam
Passing the trade exam alone doesn't earn you the RBE license. South Carolina also requires a separate Business Management and Law for Residential Builders examination. This exam has 50 questions, a 120-minute time limit, and requires 34 correct answers (68%) to pass. It draws from a different reference: NASCLA's South Carolina Residential Builders guide, eighth edition, rather than the electrical code references used on the trade portion.
Both exams must be passed within a one-year eligibility period after Commission approval, and each is scheduled and paid for separately through PSI.
Fees and Costs to Expect
Budgeting for SC-RSC-EL involves both testing fees and state licensing fees, and they're charged at different stages:
- PSI exam fee: $75 per examination portion (charged separately for the trade exam and the business/law exam)
- State application fee: $135
- Initial licensure fee: $220
- Renewal fee: $220, due biennially
On top of testing and licensing fees, covered residential specialty contracting work exceeding $500 requires the license, and a surety bond of at least $10,000 is required for undertakings exceeding $5,000 in combined labor and materials. That bond figure is the coverage amount, not the premium you'd pay to purchase it. For a complete cost breakdown including how these pieces add up over an application cycle, see the SC-RSC-EL Certification Cost breakdown.
Eligibility and Application Requirements
Before you can sit for either exam, the Commission needs to approve your application. Requirements include:
- At least one year of relevant supervised electrical experience
- An affidavit signed by the qualifying licensed builder, general contractor, or electrician verifying that experience
- Supporting documentation of your work history
- A credit report
- Verification of lawful presence
Only after the Commission approves your file can you schedule with PSI. Once approved, you have a one-year eligibility window to pass both exams, and you're allowed three attempts. A third failure triggers a mandatory 12-month wait from your last attempt before you can try again. This makes early, focused preparation far more valuable than repeated blind attempts. The full requirements article walks through each document in more detail, and the exam dates and scheduling guide explains how the eligibility window interacts with PSI's scheduling system.
Open-Book References Allowed at PSI
Unlike many licensing exams, SC-RSC-EL is open-book - but with strict limits on what you can bring. The listed trade references are:
- 2017 National Electrical Code (NEC) or the NEC Handbook
- 2018 International Residential Code (IRC), South Carolina IRC, or IRC Commentary
- Ugly's Electrical References (2017)
- OSHA 29 CFR Part 1926
You're allowed to highlight, underline, and add permanent tabs to these references. Handwritten notes, removable tabs, and any extra loose or attached papers are prohibited. A silent, nonprinting, nonprogrammable calculator is also permitted. If you're using the alternative NASCLA path instead of this state-specific exam, note that its reference list differs - always confirm you're using the code editions listed for the exam you're actually taking.
Key Takeaway
Tab your 2017 NEC before test day. Permanent tabs are allowed and can save critical minutes when Domain 2 questions send you hunting through Article 220 or 230 under time pressure.
Who Actually Needs This License
The Residential Electrician (RBE) license is required for anyone performing covered residential electrical specialty contracting work exceeding $500 in South Carolina. In practice, this includes electricians working under residential builders, general contractors, or as independently licensed residential electrical contractors on single-family and residential construction projects. Employers and hiring builders in South Carolina's residential construction market look for this license specifically because it confirms both electrical trade competency and Commission-verified business/legal knowledge. If you're evaluating whether pursuing this license fits your career plans, the ROI analysis and SC-RSC-EL Jobs overview go into the employment landscape in more detail, and the salary guide covers earnings considerations.
Preparing for SC-RSC-EL Without Wasting Time
Because the domains are weighted so unevenly, a generic study plan wastes time. A more efficient approach allocates study weeks according to the point value of each domain rather than treating all nine equally.
Domain 2 and Domain 1 Foundations
- Work through service/feeder sizing and load calculation problems
- Review general electrical knowledge terminology and NEC navigation
Grounding/Bonding and Overcurrent Protection
- Drill grounding electrode and bonding jumper sizing rules
- Practice overcurrent device selection scenarios
Conductors, Raceways, Lighting, Specialty, Safety
- Cover the five smaller domains in condensed review sessions
- Focus extra attention on Domain 8's pool/spa and generator rules
Timed Practice and Reference Tabbing
- Take full-length timed practice sessions on the practice test platform
- Finalize NEC tabs and confirm your calculator meets PSI's rules
Spacing your review this way - heaviest domains first, smaller domains batched together, and a full week reserved for timed practice - respects both the exam's weighting and the 180-minute pressure you'll face on test day. For a structured week-by-week plan with more detail, see the SC-RSC-EL Study Guide. If you're still deciding how much runway you need, the difficulty guide breaks down where most candidates struggle. And when you're ready to test your recall quickly, the one-page cheat sheet is a fast final review tool.
Frequently Asked Questions
No. SC-RSC-EL refers to South Carolina's state-specific PSI trade exam for the Residential Electrician (RBE) license. NASCLA is a separate, alternative electrical examination path with its own reference list.
The trade exam has 60 scored multiple-choice questions within a 180-minute limit. PSI may add 5 to 10 unscored pretest questions, but their answering time is excluded from the exam clock.
You need 44 correct answers out of 60, or 73.3%, to pass the trade exam. The separate Business Management and Law exam requires 34 correct out of 50, or 68%.
Services, Feeders, and Branch Circuits (Domain 2) has the most at 15 questions, followed by General Electrical Knowledge (Domain 1) at 13.
Both exams must be passed within a one-year eligibility period, and candidates are allowed three attempts. A third failure requires waiting 12 months from the last examination attempt before trying again.