Lightning Protection Institute Lightning Protection Institute

Master Installer

Master Installer Series

This series of tests consists of two exams to reach the level of Journeyman Installer (JI); two additional exams to reach Master Installer certification (MI); and one additional exam to become certified as a Master Installer/Designer (MID). The exams have a 2 hour time limit with the exception of Master Installer 1 and Master Installer 2 and Master Installer/Designer. For those exams, there is a 2 ½ hour time limit.

Exams are given once yearly at our spring Annual Conference. However, an applicant wanting to sit for the exam at alternate times or sites may arrange for the LPI to work through a proctor. The applicant is responsible for finding a proctor (we suggest contacting a local library or college, who often have persons that proctor tests) and making all arrangements with the proctor. A proctor cannot be employed by the applicant’s business or be related to the applicant. Any charges for proctor services are the responsibility of the applicant, and no billing will be handled by the LPI for these services.

The LPI will mail exam(s) marked for the applicant to the proctor. After the proctor oversees the test taking, (s)he will return the completed exam(s) to the LPI with a notice certifying his/her monitoring of the examination process. The LPI office will score the exam(s) and notify the applicant of the results in writing.


The fee for each exam is $100 for persons employed by LPI member companies and $200 for non-members, payable prior to the exams being sent to a proctor. *There is a 50% discounted rate on each test if taken at our LPI/ULPA Annual Conference (please mark on your application the Proctor is “Annual Conference” so we can distinguish your application). The exams require 70 percent or more correct for passing. Examinations that are not passed may be retaken at any time by following the above procedures and submitting new payment (it is not free to retest, the fee applies each time you test irregardless of how many attempts have been made). An individual may take all 5 tests in one sitting, however, the tests must be passed sequentially before certification is to be issued.

Each Journeyman Installer, Master Installer and Master Installer/Designer will be billed a $50 re-certification fee due on June 30th of each year. An update test will also be required when lightning protection standards change. (Journeyman Installers whose companies are not members of LPI must pay an additional $450 in annual dues; Master Installers and Master Installer/Designers whose companies are not members of LPI must pay an additional $700 in annual dues.)


Exams are not open book tests. Applicants may use a regular ruler, an Engineering Scale ruler, an Architectural Scale ruler, and a calculator. Cell phones must be turned off.

All tests and materials not used within 60-days of receipt by the proctor must be returned to the LPI office. Applicants must reapply and pay the full fee if the tests are resent. No refunds will be given for tests in any way, whether completed or not completed.

Study Materials

Study materials for the exams are available for sale through the online store. Copies of the NFPA-780 Standard sell for $76.00 each. Copies of the LPI-175 Standard range from $40.00-$55.00 (download or hard copy options available). Hard copy prices include all shipping and handling.

The Journeyman Installer, Master Installer and Master Installer Designer tests include true/false, multiple choice, short answer and/or fill in the blank questions as well as design application problems. More design problems are included with each progressive test. A thorough knowledge of NFPA-780 and LPI-175, including formulas, material sizes and design parameters will be tested along with the ability to apply requirements to paper design drawings.

Registration Options

If you wish to take your exam at the LPI Annual Conference you cannot use an online registration form, please use the paper form below.

Sample Questions


Multiple Choice

Short Answers


  1. Connections of roof cable conductor to structural steel used as downleads must be made by connectors
    with a minimum of 3 square inches of contact area.
  2. Only 1 air terminal must be mounted to a chimney if located within 24 inches of all outside corners.
  3. In no case, shall 2 downleads be spaced closer together than 100 feet.
  4. Any properly grounded structural steel framing member (beam or column), which is 1/4″ thick, would qualify as a substitute for a main cable conductor.
  5. All metal guy wires for protected chimneys or vents must be connected to the lightning protection system at their top and bottom.

Multiple Choice

  1. A 60-foot tall flat roof building is classified as:Class I structure
    Class I modified structure
    Class II structure
    Class II modified structure
    Class II solid copper air terminals must be of what minimum diameter?

    1/4 inch
    3/8 inch
    1/2 inch
    5/8 inch

  2. The minimum weight requirement for Class I copper conductor is…

    95 lbs. per 1000′
    187 1/2 lbs. per 1000′
    190 lbs. per 1000′
    375 lbs. per 1000′

  3. The minimum ground resistance specified in the Standards for a lightning protection system grounding electrode is…

    5 ohms
    25 ohms
    50 ohms
    None of the above

  4. The material no longer allowed by NFPA for a driven grounding electrode is:

    Copperclad steel
    Galvanized steel
    Solid copper
    Stainless steel

Short Answers

11. Services entering a structure fall into 3 categories that specifically require a surge protection device. Name the 3 systems identified by NFPA-780.

12. The type of metal body that must always be considered for bonding is a/an ________ metal body.

14. The minimum total number of air terminals required to protect a flat top mechanical unit measuring 4 feet wide x 10 feet long is ________ .

15. Trees are recommended to have 2 downleads when the trunk exceeds a diameter of ______ feet.