North Carolina Restricted Limited Plumbing Contractor Exam Book Package

Prepare for the North Carolina Restricted Limited Plumbing Contractor examination with a focused reference-book package covering exterior plumbing systems, residential code requirements, code administration, licensing laws, business operations, and project management.

The Restricted Limited Plumbing Contractor classification is designed for a defined scope of exterior plumbing work. It includes exterior building sewer piping, exterior water-service piping two inches or smaller, exterior backflow preventers installed on piping two inches or smaller, and water-filtration systems. Candidates should understand both the technical requirements for this work and the legal limits of the classification.

This package includes the five references identified for the North Carolina Restricted Limited Plumbing Contractor examination: the North Carolina Administrative Code and Policies, 2018 Edition; North Carolina Plumbing Code, 2018 Edition; North Carolina Residential Code, 2018 Edition; NC Board’s Laws & Rules, 2026 Edition; and NASCLA Business, Law, and Project Management, 7th Edition.

Each book supports a different part of the licensing examination. The North Carolina Plumbing Code is the primary technical resource for exterior building sewer piping, exterior water services, approved materials, sizing, protection, testing, backflow prevention, connections, cleanouts, and installation requirements.

The North Carolina Residential Code supports questions involving plumbing systems serving qualifying residential buildings. Candidates may use it to review water-service installation, building sewer connections, piping materials, burial requirements, backflow protection, and related residential construction provisions.

The North Carolina Administrative Code and Policies addresses permits, inspections, approvals, construction documents, code enforcement, alternative materials, and the authority and responsibilities of code officials. These administrative requirements are important because exterior plumbing work must be properly permitted and inspected when required.

The NC Board’s Laws & Rules reference explains the statutes and administrative rules governing plumbing contractors in North Carolina. It supports preparation involving license classifications, examination requirements, professional conduct, supervision, permit responsibilities, advertising, enforcement, and the limits placed on restricted licenses.

NASCLA Business, Law, and Project Management supports the Business and Law portion of the examination. It covers business organization, contracts, estimating, financial management, project administration, employment responsibilities, safety programs, insurance, recordkeeping, and risk management.

The Restricted Limited Plumbing Contractor examination is open book. Candidates are responsible for bringing the approved references and ensuring that the books comply with the current rules for binding, commercial tabs, highlighting, and markings. Strong preparation combines trade knowledge with repeated practice locating information in the approved books.

What You Get

Exam Details

The North Carolina Restricted Limited Plumbing Contractor licensing process includes a technical examination and a Business and Law examination. The Restricted Limited Plumbing Contractor technical examination allows two hours. The Business and Law examination allows one and one-half hours.

The Business and Law examination may not be required when an applicant already holds a currently active contractor license issued by the same Board and passed the Board’s Business and Law examination after August 2003. The applicant must meet the Board’s conditions for the exemption.

The technical examination focuses on the work authorized by the restricted classification. Candidates should prepare for questions involving exterior building sewer piping, exterior water-service piping two inches or smaller, exterior backflow preventers on piping two inches or smaller, water-filtration systems, permits, inspections, safety, and applicable plumbing-code requirements.

Exterior building sewer preparation may include approved piping materials, minimum size, slope, cleanouts, changes in direction, connections, trench conditions, bedding, support, protection from damage, testing, and the transition between the building drain and the exterior sewer system.

Exterior water-service preparation may involve approved materials, sizing, pressure, burial depth, separation from sewer piping, protection against freezing and physical damage, valves, joints, connections, backflow protection, and prevention of contamination.

Backflow-prevention study should include the purpose of protecting potable water, common backflow conditions, approved devices, installation location, accessibility, drainage, testing considerations, protection from freezing, and restrictions associated with the two-inch piping limitation.

Water-filtration preparation may include equipment location, piping connections, bypass arrangements, shutoff valves, drainage, pressure considerations, service access, protection against contamination, and installation according to applicable code and manufacturer requirements.

Candidates should also understand trenching and excavation safety. Exterior plumbing work may expose workers to cave-ins, underground utilities, water accumulation, traffic hazards, falling materials, and restricted access. Safe excavation procedures remain an important part of professional plumbing work.

Administrative questions may address when permits are required, inspection responsibilities, correction of noncompliant work, approved materials, construction documents, code-official authority, and the process for obtaining approval before concealing or placing a system into service.

The Business and Law portion may cover business organization, proposals, contracts, estimating, project scheduling, financial controls, employment practices, insurance, safety programs, recordkeeping, licensing rules, and risk management.

Open Book Test

The North Carolina Restricted Limited Plumbing Contractor examination is an open-book test. Candidates must bring the references assigned to the examination category. Only books approved for that examination may be taken into the testing room.

The current reference list identifies the North Carolina Administrative Code and Policies, North Carolina Plumbing Code, North Carolina Residential Code, Board’s Laws & Rules, and the approved Business and Project Management reference for Restricted Limited Plumbing Contractor candidates.

Hard-bound, spiral-bound, and ring-bound editions may be used when they remain in their original published condition. Approved loose-leaf codebooks must remain in the original binders provided by the publisher.

Commercially available, non-removable index tabs may be permanently attached to the pages. Highlighting is permitted. Written notes, formulas, calculations, underlining, homemade tabs, unauthorized divider pages, loose paper, taped inserts, copied material, and printed PDF editions are not allowed.

Open-book testing requires preparation because the examination period is limited. Candidates should not expect to read unfamiliar chapters from beginning to end during the test. A better method is to identify the subject, select the correct reference, locate the governing section, and confirm the answer efficiently.

A question involving exterior building sewer slope or cleanouts should direct the candidate to the Plumbing Code. A question involving a residential water-service connection may require the Residential Code. A permit or inspection question may require the Administrative Code and Policies.

Questions involving the permitted scope of a Restricted Limited Plumbing Contractor, professional conduct, supervision, or Board authority should direct the candidate to the NC Board’s Laws & Rules. Business questions involving contracts, estimating, financial management, or project administration may require the NASCLA reference.

Candidates should practice using the table of contents, index, definitions, chapter headings, tables, figures, and cross-references in every book. Reading the complete provision is important because exceptions, limitations, and connected sections may affect the correct answer.

Licensing Steps

1. Confirm the restricted classification. Review the authorized work and make sure it matches the applicant’s experience and intended services.
2. Obtain the required references. Applicants should have the current approved books and prepare with the same references used during the examination.
3. Document qualifying experience. Collect records showing experience in the installation, maintenance, service, or repair of plumbing systems.
4. Complete the contractor examination application. Select the Restricted Limited Plumbing Contractor classification and provide the requested personal and employment information.
5. Obtain the required background report. Follow the Board’s instructions for securing and submitting the nationwide criminal background record report.
6. Submit experience verification. Provide properly completed employer statements and the supporting employment or earnings records requested by the Board.
7. Submit the completed application. Include all required forms, signatures, notarizations, supporting documents, and applicable examination fees.
8. Receive examination approval. The Board reviews the application, experience, background information, and supporting records before authorizing the applicant to test.
9. Schedule the examinations. Approved applicants receive instructions for scheduling the technical and Business and Law examinations.
10. Prepare the approved books. Make sure every reference complies with the current rules for binding, tabs, highlighting, inserts, and markings.
11. Complete the examinations. Take the two-hour technical examination and the one-and-one-half-hour Business and Law examination unless a Board-approved exemption applies.
12. Complete license issuance requirements. Passing the examinations satisfies the testing component, but all remaining Board requirements must be completed before the license is issued.

State Requirements

The North Carolina State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors administers the Restricted Limited Plumbing Contractor license. The Board reviews applications, verifies experience, authorizes examinations, issues licenses, and enforces the laws and rules governing licensed plumbing work.

Applicants must document 1,500 hours, or approximately nine months of full-time experience, in the installation, maintenance, service, or repair of plumbing systems. The experience may involve work for which a plumbing license was or was not required.

Approved academic or technical training directly related to plumbing may account for up to one-half of the experience requirement. This means qualifying education may provide credit for up to 750 hours.

A current active licensee of the North Carolina Irrigation Contractor Licensing Board may qualify through an alternative path when the applicant also holds an approved municipal Backflow Inspector certification or demonstrates the required experience maintaining, servicing, or repairing plumbing-system components.

An applicant with current active certification as an On-Site Wastewater Contractor may also qualify through an alternative path when the applicant completes the applicable plumbing education or demonstrates the required experience with plumbing-system components.

The Restricted Limited Plumbing Contractor license authorizes exterior building sewer piping, exterior water-service piping two inches or smaller, exterior backflow preventers installed on piping two inches or smaller, and water-filtration systems.

The license does not provide the same scope as a Plumbing Class I or Plumbing Class II Contractor license. License holders must remain within the work expressly authorized by the restricted classification.

Restricted license holders may not offer or perform plumbing contracting outside the approved scope. Performing work beyond the classification may result in enforcement or disciplinary action.

Passing the examination does not independently authorize contracting. The applicant must receive the active Restricted Limited Plumbing Contractor license before advertising, bidding, contracting, or performing work that requires this credential.

Licensed contractors are responsible for obtaining required permits, arranging inspections, supervising work, maintaining current license information, and complying with applicable plumbing codes, safety requirements, Board rules, and professional standards.

Reference Books

• North Carolina Administrative Code and Policies, 2018 Edition
  This reference addresses administration of the North Carolina State Building Code, including permits, construction documents, inspections, approvals, alternative materials, enforcement, code-official authority, and contractor responsibilities.
• North Carolina Plumbing Code, 2018 Edition
  This is the primary technical reference for exterior plumbing preparation. It covers water services, building sewers, materials, sizing, slope, cleanouts, backflow prevention, testing, protection, connections, and installation requirements.
• North Carolina Residential Code, 2018 Edition
  This reference contains plumbing requirements for qualifying residential buildings, including water-service piping, building sewer connections, materials, burial, backflow protection, and related residential installation provisions.
• NC Board’s Laws & Rules, 2026 Edition
  This Board-issued reference contains the statutes and administrative rules governing North Carolina plumbing contractors, including restricted classifications, examination requirements, professional conduct, supervision, permits, enforcement, and license-holder responsibilities.
• NASCLA Business, Law, and Project Management, 7th Edition
  This reference supports the Business and Law examination with material involving business organization, contracts, estimating, financial management, project administration, employment practices, safety, insurance, recordkeeping, and risk management.

Exam Room Approved Books

• North Carolina Administrative Code and Policies, 2018 Edition
  Used for questions involving permits, inspections, construction documents, approvals, administration, and code enforcement.
• North Carolina Plumbing Code, 2018 Edition
  Used for technical questions involving exterior water services, building sewers, backflow prevention, materials, sizing, protection, and installation.
• North Carolina Residential Code, 2018 Edition
  Used for plumbing requirements associated with qualifying residential buildings and exterior residential plumbing connections.
• NC Board’s Laws & Rules, 2026 Edition
  Used for questions involving license scope, Board authority, professional conduct, supervision, enforcement, and contractor responsibilities.
• NASCLA Business, Law, and Project Management, 7th Edition
  Used for the Business and Law examination covering contractor business operations and project-management responsibilities.

Test Information and Study Materials

Build a study plan around exterior water services, exterior building sewers, backflow prevention, water filtration, permits, inspections, licensing laws, and contractor business practices.

Practice using the Plumbing Code to locate approved materials, sizing requirements, burial provisions, cleanout rules, separation requirements, connections, testing procedures, and protection against contamination or damage.

Review the Residential Code for provisions affecting exterior plumbing connected to single-family dwellings and other qualifying residential buildings. Learn when the residential reference applies and when the Plumbing Code provides the controlling requirement.

Use timed navigation exercises. Select a topic, locate it through the index, identify the applicable section, read the complete provision, and review related exceptions or cross-references.

Study the Administrative Code and Policies together with the technical codes. Proper plumbing work involves both technical installation and compliance with permits, inspections, approvals, and code-enforcement procedures.

Review the Board’s Laws & Rules regularly. Candidates should understand the precise limits of the restricted license and avoid confusing it with the broader Plumbing Class I or Class II classifications.

For the Business and Law examination, study contracts, bidding, estimating, project scheduling, financial controls, employment practices, insurance, recordkeeping, safety programs, and risk management.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps North Carolina Restricted Limited Plumbing Contractor candidates organize technical, administrative, licensing, and business references into a practical study structure.

Trade-focused review connects code provisions with exterior plumbing work, including water services, building sewers, backflow preventers, filtration systems, trench conditions, testing, permits, and inspections.

Practice-oriented preparation helps candidates identify the subject of a question, select the correct reference, locate the applicable section, and confirm the answer using the surrounding code language.

Reference-navigation practice develops familiarity with indexes, definitions, chapters, tables, figures, and cross-references. These skills are especially important during the two-hour technical examination.

Business and law preparation supports the responsibilities that accompany a contractor license, including proposals, contracts, estimating, financial management, project administration, safety, employment practices, insurance, and recordkeeping.

No book package can guarantee examination passage or license issuance. Results depend on the applicant’s experience, qualifications, preparation, understanding of the references, and performance during the examinations.

Frequently Asked Questions

What books are included in this package?

The package includes the 2018 North Carolina Administrative Code and Policies, Plumbing Code, Residential Code, the NC Board’s Laws & Rules 2026 Edition, and NASCLA Business, Law, and Project Management, 7th Edition.

Is the examination open book?

Yes. Candidates must bring the approved references and ensure that the books comply with current examination rules.

Are all five books allowed in the examination room?

Yes. The five listed references are identified for the Restricted Limited Plumbing Contractor technical and business examinations.

What work does the restricted license cover?

It covers exterior building sewer piping, exterior water-service piping two inches or smaller, exterior backflow preventers on piping two inches or smaller, and water-filtration systems.

How long is the technical examination?

The Restricted Limited Plumbing Contractor technical examination allows two hours.

Is there a separate Business and Law examination?

Yes. The Business and Law examination allows one and one-half hours unless the applicant qualifies for a Board-approved exemption.

How much experience is required?

Applicants must document 1,500 hours of qualifying plumbing experience. Approved related education may account for up to 750 hours.

Can I write notes in the exam books?

No. Written notes, formulas, calculations, underlining, homemade tabs, and added text are prohibited. Highlighting and approved permanently attached commercial tabs are permitted.

Are printed PDF codebooks allowed?

No. Printed PDF versions of the examination references are not permitted in the testing room.

Does this license allow interior plumbing work?

The credential is limited to the exterior plumbing and filtration work authorized by the Restricted Limited Plumbing Contractor classification. It does not provide the broader authority of Plumbing Class I or Class II licensing.

Does passing the examinations automatically issue the license?

No. Passing the examinations satisfies the testing component, but the applicant must complete all experience, application, background, documentation, and license-issuance requirements.

Does this book package guarantee a passing score?

No. Examination results depend on the candidate’s experience, preparation, understanding of the books, reference-navigation skills, and performance during the examinations.