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Prepare for the North Carolina Special Restricted Plumbing and Heating Contractor examination with a focused book package covering electrical wiring for plumbing, heating, and air conditioning equipment, motors, controllers, branch circuits, feeders, conductors, disconnecting means, grounding, bonding, overcurrent protection, contractor licensing law, Board rules, business practices, and project management.
The Special Restricted Plumbing, Heating, and Air Conditioning classification, commonly identified as SP-PH, is intended for professionals who perform qualifying electrical work as an incident to a lawful plumbing, heating, or air conditioning business. This restricted classification does not authorize general electrical contracting or electrical installations unrelated to the equipment served.
This package includes the 2020 National Electrical Code as the approved examination-room reference. The NEC supports preparation involving HVAC and plumbing equipment, motors, compressors, pumps, controllers, branch circuits, feeders, disconnects, conductor sizing, grounding, bonding, raceways, boxes, overcurrent protection, control wiring, and electrical equipment installed in wet, damp, outdoor, or mechanical locations.
The package also includes three closed-book study references that are not allowed in the examination room: Electrical Contractors Licensing Law, the Board’s Rules for the Implementation of the Electrical Contractors Licensing Law, and the NASCLA Contractors’ Guide to Business, Law, and Project Management: North Carolina Electrical Edition.
These additional references support preparation involving North Carolina licensing classifications, applicant qualifications, restricted license scope, listed qualified individual responsibilities, contracts, estimating, financial management, project scheduling, employment practices, safety, insurance, recordkeeping, and contractor compliance.
Plumbing, heating, and air conditioning systems may contain motors, compressors, pumps, air handlers, furnaces, boilers, heat pumps, condensing units, package units, refrigeration equipment, control transformers, thermostats, relays, contactors, disconnecting means, and related electrical components. Candidates should understand how general NEC requirements apply to each component and how the SP-PH scope limits the work that may be performed.
The North Carolina Special Restricted Plumbing and Heating Contractor examination is open book, but only the approved 2020 National Electrical Code may be used in the examination room for this classification. The licensing law, Board rules, and NASCLA business reference are included for study before the examination and cannot be consulted during the test.
This book package gives candidates a practical group of technical, legal, and business references for building an organized preparation plan. It is designed for experienced plumbing, heating, and air conditioning professionals seeking to demonstrate their knowledge of electrical installation requirements and restricted electrical contracting responsibilities in North Carolina.
The North Carolina Special Restricted Plumbing and Heating Contractor examination contains 40 multiple-choice questions. Candidates have a maximum of three hours to complete the examination.
The examination is administered through PSI after the North Carolina State Board of Examiners of Electrical Contractors approves the applicant. Candidates must receive examination authorization before scheduling a testing appointment.
The SP-PH examination evaluates technical, legal, and business knowledge associated with electrical work for plumbing, heating, and air conditioning equipment. Candidates should prepare for questions involving motors, compressors, pumps, controllers, branch circuits, feeders, conductors, overload protection, short-circuit and ground-fault protection, grounding, bonding, disconnecting means, raceways, boxes, licensing law, Board rules, and contractor business practices.
Motor questions may involve full-load current, conductor sizing, overload protection, branch-circuit short-circuit and ground-fault protection, feeder sizing, controller ratings, disconnect ratings, and the use of NEC motor tables. Candidates should understand that conductor protection, motor overload protection, and branch-circuit protection are separate subjects that may require different calculations.
Air conditioning and refrigeration questions may involve hermetic refrigerant motor-compressors, multimotor equipment, nameplate ratings, minimum circuit ampacity, maximum overcurrent protection, disconnecting means, equipment grounding, and branch-circuit conductor requirements.
Equipment preparation may include furnaces, boilers, heat pumps, condensing units, air handlers, package units, pumps, fans, blowers, refrigeration equipment, circulation systems, water heaters, humidifiers, and related controls.
Feeder and branch-circuit preparation may include connected load calculations, continuous loads, conductor ampacity, correction factors, adjustment factors, terminal temperature limitations, voltage drop, and overcurrent-device selection.
Control-circuit questions may address control transformers, thermostats, relays, contactors, pressure switches, float switches, low-voltage controls, equipment interlocks, overcurrent protection, and wiring that extends beyond the immediate equipment location.
Grounding and bonding preparation should include equipment grounding conductors, bonding of metal enclosures and raceways, effective ground-fault current paths, grounding electrode systems, grounding electrode conductors, and connections to plumbing, heating, and air conditioning equipment.
Raceway and cable questions may address rigid metal conduit, intermediate metal conduit, electrical metallic tubing, PVC conduit, flexible metal conduit, liquidtight flexible conduit, cable assemblies, support, bends, fittings, physical protection, raceway fill, wet locations, and outdoor installations.
Disconnecting-means preparation should include location, accessibility, visibility, ratings, markings, permitted device types, and the relationship among the disconnect, controller, motor, compressor, and overcurrent protective device.
Business and law questions may involve license classifications, applications, experience qualifications, contracts, estimating, project scheduling, financial controls, employment practices, insurance, safety programs, permits, inspections, recordkeeping, license use, and the responsibilities of a listed qualified individual.
The North Carolina Special Restricted Plumbing and Heating Contractor examination is an open-book test. The 2020 National Electrical Code is the only reference from this package allowed in the examination room for the SP-PH classification.
The Electrical Contractors Licensing Law, Board rules, and NASCLA business reference are included for closed-book preparation. Candidates should review these books thoroughly before the examination because licensing and business questions must be answered without consulting them during the test.
The NEC may be brought in an approved softbound, spiral-bound, or hardbound format. Loose-leaf references and incomplete copies are not permitted.
The reference may be highlighted, underlined, and annotated before the examination. Pencil notes must be highlighted, while notes written in pen do not need to be highlighted. Candidates may not write in the reference during the examination session.
Permanent tabs may be used when they comply with current testing requirements. Temporary tabs, removable notes, divider tabs, loose sheets, attached papers, and unauthorized inserts are not allowed.
Open-book testing requires familiarity with the NEC. Candidates should practice using the index, table of contents, definitions, article structure, tables, exceptions, and cross-references so they can locate information efficiently.
A question involving an air conditioning unit may require the equipment nameplate provisions and the NEC article covering air conditioning and refrigeration equipment. A question involving a pump motor may require the general motor provisions and applicable motor tables.
A conductor-sizing question may require the equipment nameplate, an ampacity table, terminal temperature limitations, and correction or adjustment factors. A grounding question may require both the general grounding article and requirements specific to the equipment or wiring method.
Timed code-navigation practice can help candidates use the three-hour examination period effectively. A practical approach is to identify the subject, select the applicable NEC article, locate the correct section or table, and determine whether an exception or special condition applies.
The North Carolina State Board of Examiners of Electrical Contractors regulates the SP-PH examination and license. The Board establishes applicant qualifications, reviews experience, authorizes examinations, issues licenses, and enforces the Electrical Contractors Licensing Law and related rules.
An applicant for the Special Restricted Plumbing and Heating classification must document at least 3,000 hours of qualifying experience. At least 2,000 hours must be primary experience. The remaining hours may consist of primary experience, secondary experience, or a combination of both.
Applicants may receive credit for qualifying service gained in the plumbing, heating, or air conditioning field when the experience falls within categories recognized by the Board. Experience must be documented according to the examination application requirements.
The applicant must verify that the applicant is primarily engaged in or regularly employed by a lawful plumbing, heating, or air conditioning business in North Carolina and will serve as the listed qualified individual for that business.
The SP-PH license authorizes installation, maintenance, or repair of electrical wiring or devices only as an incident to the license holder’s plumbing, heating, or air conditioning business.
The authorized wiring must be directly related to plumbing, heating, or air conditioning equipment. It is limited to circuits or portions of circuits operating at no more than 600 volts phase to phase.
The equipment wiring must be electrically isolated from the building wiring system by an overcurrent protective device, such as a fused switch or circuit breaker, installed with complete line-side connections by others.
The protective device must be permanently and legibly marked to identify the equipment it serves. It may be located in an enclosure intended solely for the specific equipment or in a building panelboard when the required downstream wiring and disconnecting arrangement have been installed by others.
When the protective device is located in a panelboard serving the building wiring system, wiring must be installed by others from the load-side terminals to a junction box, auxiliary gutter, or similar disconnecting means outside the panelboard. That point must be in sight of and within 50 feet of the equipment served.
The electrical work authorized by the SP-PH classification begins at the load-side terminals of the protective isolating device. Line-side building wiring is outside the restricted scope.
Except for qualifying control wiring, the authorized wiring must remain physically adjacent to the plumbing, heating, or air conditioning equipment. Control wiring that receives its power from the equipment may extend beyond that area when the control voltage does not exceed 120 volts to ground and the wiring is protected from overcurrent.
Wiring performed under the SP-PH classification may not be installed in a location classified as hazardous under the National Electrical Code.
The SP-PH license does not authorize general electrical contracting or unrelated electrical installations. All work must remain within the scope established for plumbing, heating, and air conditioning equipment.
Special restricted classifications are not subject to the same project-value limits that apply to regular Limited and Intermediate electrical contractor licenses. The absence of a project-value limit does not expand the type of work authorized.
Passing the examination does not independently authorize electrical contracting. The appropriate license must be issued and active before the individual or business performs or offers to perform work requiring the SP-PH classification.
Build a study plan around motors, compressors, pumps, controllers, branch circuits, feeders, conductor ampacity, overload protection, short-circuit protection, grounding, bonding, disconnecting means, raceways, HVAC equipment, licensing law, Board rules, and contractor business practices.
Use the 2020 NEC to review motor full-load current, compressor requirements, equipment nameplates, minimum circuit ampacity, maximum overcurrent protection, conductor sizing, controller ratings, disconnect ratings, and grounding requirements.
Practice distinguishing between motor overload protection and branch-circuit short-circuit and ground-fault protection. These devices perform different functions and are selected under different NEC rules.
Review wiring methods for outdoor, damp, wet, mechanical, and equipment locations. Pay attention to flexible connections, conductor insulation, physical protection, support, fittings, grounding, bonding, and enclosure ratings.
Use timed reference-navigation exercises. Read the question, identify the electrical subject, locate the applicable NEC article or table, review the complete requirement, and determine whether an exception, definition, nameplate provision, or cross-reference applies.
Study the licensing law and Board rules separately because they are not available during the examination. Focus on the SP-PH scope, qualifying experience, application requirements, listed qualified individual responsibilities, renewals, continuing education, and prohibited conduct.
Review the NASCLA business reference for contracts, estimating, scheduling, financial controls, employment responsibilities, insurance, safety administration, project documentation, and risk management.
Contractor Exam Prep helps North Carolina Special Restricted Plumbing and Heating Contractor candidates organize technical, licensing, and business references into a practical preparation structure.
Trade-focused review connects National Electrical Code requirements with plumbing, heating, and air conditioning equipment, including motors, compressors, pumps, controllers, conductors, disconnects, grounding, bonding, overload protection, and overcurrent protection.
Practice-oriented preparation helps candidates identify the subject of a question, locate the applicable NEC article or table, review the governing requirement, and apply the information efficiently.
Reference-navigation practice builds familiarity with the 2020 NEC index, definitions, articles, tables, exceptions, and cross-references. These skills support more effective use of the approved book during the three-hour open-book examination.
Closed-book study guidance helps candidates review the Electrical Contractors Licensing Law, Board rules, restricted SP-PH scope, experience qualifications, and business-management subjects that cannot be referenced during the test.
Confidence-building study structure helps candidates divide a broad examination into manageable technical, regulatory, and business sections while maintaining consistent preparation.
No book package can guarantee examination passage or license issuance. Results depend on the candidate’s experience, qualifications, preparation, familiarity with the NEC, understanding of plumbing and HVAC electrical systems, and performance during the examination.
The package includes the 2020 National Electrical Code, Electrical Contractors Licensing Law, the Board’s electrical contracting rules, and the NASCLA Contractors’ Guide to Business, Law, and Project Management: North Carolina Electrical Edition.
Yes. The examination is open book, but only the approved 2020 National Electrical Code may be used in the examination room.
No. Those references are included for closed-book study and are not allowed in the testing room.
The North Carolina Special Restricted Plumbing and Heating Contractor examination contains 40 multiple-choice questions.
Candidates have a maximum of three hours to complete the examination.
Applicants must document at least 3,000 hours of qualifying experience, including at least 2,000 hours of primary experience.
The license authorizes electrical wiring and devices directly related to plumbing, heating, or air conditioning equipment as an incident to the license holder’s lawful trade business.
The authorized wiring begins at the load-side terminals of the overcurrent protective isolating device installed and connected on the line side by others.
The authorized wiring is limited to circuits or portions of circuits operating at no more than 600 volts phase to phase.
Qualifying control wiring may extend beyond the immediate equipment area when it receives control power from the equipment, does not exceed 120 volts to ground, and is protected from overcurrent.
No. Wiring performed under the SP-PH classification may not be installed in a location classified as hazardous under the National Electrical Code.
No. The license is limited to qualifying electrical work directly related to plumbing, heating, and air conditioning equipment.
No. Passing satisfies the examination requirement, but the applicant must complete the Board’s licensing process before performing work under the SP-PH classification.
