South Carolina Electrician License Guide: Exam Requirements, Fees & NEC Edition (2026)

South Carolina splits electrical licensing into two completely separate systems depending on the size of the job: a Residential Electrical Specialty license from the Residential Builders Commission for jobs over $500, and a Mechanical Contractor's Electrical classification from the Contractors' Licensing Board for commercial work over $10,000. Both are tested through PSI, but with different exams, different fees, and — as our research found — different levels of currency in their published materials. Here's exactly how each one works.

Quick Answer

Two Licenses, Two Boards

South Carolina's LLR (Department of Labor, Licensing and Regulation) draws a hard line based on project size. Per the state's own guidance: "Residential electrical work exceeding $500 requires a license" from the Residential Builders Commission. But "if you intend to perform commercial electrical work that exceeds $10,000," you need a Mechanical Contractor's license with an Electrical classification from the separate Contractors' Licensing Board instead. These are administered by different boards, use different exam bulletins, and are not interchangeable — an electrician doing both residential and larger commercial jobs may need both credentials.

Residential Electrical Specialty License

The Residential Builders Commission requires two passing exam scores within a 12-month eligibility window: the trade exam and a separate Business Management and Law for Residential Builders exam (50 questions, 68% to pass, 120 minutes). You get 3 attempts to pass both within 12 months; failing three times means a 12-month wait before retesting.

For the trade portion, SC applicants get a choice:

The state-specific exam's reference list names NFPA 70, 2017 edition explicitly. The NASCLA-Accredited option, by contrast, accepts the 2020 or 2023 NEC and adds NFPA 70E, NFPA 72, Ugly's Electrical References (2023 edition), and an OSHA 1926 selections book to its reference list. NASCLA's appeal: pass it once and you can send your transcript through NASCLA's National Examination Database (NED) to other participating states, avoiding a repeat trade exam. Applicants can also skip the trade exam entirely if they hold an active SC Mechanical Contractor Electrical license for a year or more, an out-of-state license (NC or MS) by exam for a year or more, or a NASCLA Residential Electrical pass within the last 3 years.

Fees: $135 application, $220 initial license, $220 renewal (2-year cycle), $50 late renewal, $480 reinstatement.

Commercial Electrical Classification

The Contractors' Licensing Board's Mechanical Contractor classifications include Electrical among Air Conditioning, Heating, Plumbing, Lightning Protection, and others. Candidates need at least 2 years of commercial experience within the last 5 years in the classification sought, documented on an experience affidavit filed after passing the exam. Every commercial candidate (except Burglar/Fire Alarm) must also pass the separate Business Management and Law for Commercial Contractors exam (50 questions, 70% to pass, 2 hours) — unless they've already passed the residential builders' version.

Per PSI's commercial bulletin, the state-specific Electrician trade exam runs 80 questions, 4 hours, 70% to pass (56/80), fee $75. Applicants may instead elect the NASCLA Accredited exam, which multiple states accept in lieu of a repeat state-specific trade exam.

Open Book Rules and Tabbing

Both the residential and commercial trade exams are open book. Reference books listed in the applicable PSI bulletin may be highlighted, underlined, and indexed — but must otherwise be unmarked (not written in) and may not contain loose or attached papers. Proctors inspect books before and after the exam. Tabs must be permanent — defined as tabs that tear the page if removed. Avery Swift Tabs and Redi-Tag Self-Stick Permanent tabs are given as acceptable examples; Post-It Flags and Post-It Index Flags are explicitly named as unacceptable and must be removed before the exam begins, even if the packaging claims otherwise. If a proctor can peel a tab off without tearing the page, it comes off.

A Note on the Commercial Bulletin's Age

The official PSI "Commercial Contractor Candidate Information Bulletin" we pulled directly from PSI's own servers is dated "Last Revised 3/30/2010" and lists its Electrician exam reference as NFPA 70 National Electrical Code, 2005 edition, alongside a 2006 International Building Code and 2008 OSHA regulations. That's a genuinely old reference list for a document still being served as the current bulletin. Third-party test-prep sources describe the commercial electrical exam as currently based on the 2020 NEC, but we could not confirm a more recent official PSI or SCCLB bulletin superseding the 2010 version at the time of writing. If you're pursuing the commercial Electrical classification, confirm the exact reference edition directly with PSI or the SC Contractors' Licensing Board before buying a code book — don't assume the 2010 bulletin's 2005 NEC is current, and don't assume a third-party's 2020 NEC claim is either.

Frequently Asked Questions

Do I need a state electrician license in South Carolina?

Not a single unified one — you need a Residential Electrical Specialty license (Residential Builders Commission) for residential work over $500, or a Mechanical Contractor's Electrical classification (Contractors' Licensing Board) for commercial work over $10,000, depending on what you're doing.

What NEC edition does South Carolina's electrician exam use?

It depends on which exam: the residential state-specific exam's official reference list names the 2017 NEC. The NASCLA Accredited trade exam accepts the 2020 or 2023 NEC. The commercial bulletin we could access listed the 2005 NEC but is dated 2010 — confirm the current edition with PSI or LLR directly before relying on it.

Is the South Carolina electrician exam open book?

Yes, for both residential and commercial trade exams. Books may be highlighted, underlined, and tabbed with permanent (non-removable) tabs, but not written in or supplemented with loose papers.

Should I take the state-specific exam or the NASCLA exam?

If you only plan to work in South Carolina, either works. If you might license in other states later, the NASCLA Accredited exam lets you send a passing transcript to other participating states via NASCLA's National Examination Database, potentially skipping a repeat trade exam elsewhere.

Study Materials

Because South Carolina's own exam tracks reference three different NEC editions depending on which exam and bulletin you're looking at (2017 for the residential state exam, 2020/2023 for NASCLA, and an unconfirmed edition for the current commercial exam), we're not linking a single code book bundle here. Confirm which exam you're taking and its exact reference edition with PSI or LLR first, then check our electrical code book collection for the matching edition.

Official Sources

• LLR — Residential Electrician License
• PSI — SC Residential Builders Commission Candidate Bulletin
• LLR — SC Contractors' Licensing Board
• PSI — SC Contractors' Licensing Board Commercial Contractor Candidate Information Bulletin (Last Revised 3/30/2010)

This guide is for informational purposes only and is not legal advice. Licensing rules, fees, and exam content change — always confirm current requirements directly with the South Carolina Department of Labor, Licensing and Regulation before applying, testing, or purchasing study materials.