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Definition of Complaint test 1
Definition of Periodic test 2
Definition of Office test 3
Definition of Service test 4
Meter records 5_6
Schedule of watt-hour meter testing 7 to 9
Rules for meter testing 10 to 16
Classification of normal load 17 to 18
Accuracy determination 21 to 22
Adjustment of meters 22
Determination of creep 23
Test upon application to Commission 24
Fees for testing watt-hour meters 25
Standardizing laboratory 26
Meter testing Facilities and Equipment 27
Reference standards 28
Portable Rotating Standards 29
Portable Indicating Standards 30
Recommended form of Calibration card 31
Reporting tests of Watt-hour Meters 32 to 35
Complaint Periodic and Office test form 36
Service test form 37
RULES AND REGULATIONS
RELATIVE TO THE
TESTING OF WATT-HOUR METERS
AND TO THE
REPORTING OF SUCH TESTS
PUBLIC SERVICE COMMISSION, FIRST DISTRICT
Electrical corporations furnishing electrical energy within the First District shall test in a manner as hereinafter prescribed, all watt-hour meters which are in service for the purpose of billing. Reports of the tests shall be made on the forms as hereinafter prescribed.
Section 1. A complaint meter test is a test of a watt-hour meter made by an electrical corporation upon the premises where the meter is installed, as a result of a complaint of the consumer.
Section 2. A periodic meter test, is a test of a watt-hour meter made by an electrical corporation in the regular course of its business upon the premises where the meter is installed, but not at the time of installation, which test is not made as the result of a complaint from the consumer nor by the direction of the corporation, of an officer or of an employee that a special test be made.
Section 3. An office test is a test of a watt-hour meter mnde by an electrical corporation upon the premises where the meter is installed by direction of the corporation itself, of an officer, or of an employee that a special test be made.
Section 4. A service test is any test of a watt-hour meter made on a consumer's premises within a specified period after the introduction of the type on the company's system. For a direct current type the period shall be two years. For an alternating current type the period shall be three years.
Section 5. A complete record shall be kept of all complaint, office and periodic tests of watt-hour meters installed on consumer's premises. Such record shall include:
Owning company's number.
The average of the readings at full load, at light load and at normal load, as found at each and every test, as prescribed hereinafter.
Section (}. A record of tests of each meter shall be continuous f,>r a period of not less than five (5) years, and in any event of sufficient length to cover three consecutive periodic tests,
Schedule of Watt-hour Meter Testing
Section 7. Each watt-hour meter shall be tested and adjusted to register accurately within the limits specified in Section 22 before installation or within sixty (60) days after installation. Each direct current meter shall be tested and adjusted within sixty (60) days after installation.
Test reports of laboratory or installalion tests need not be filed with the Commission, and are not to be considered Periodic, Office or Complaint tests.
All types of direct current meters installed upon consumers' premises shall be periodically tested in accordance with the following schedule:
Section 8. A. Meters up to and including twenty-five (25) amperes rated capacity shall be tested at least once every twenty-four (24) months.
B. Meters exceeding twenty-five (25) amperes up to and including two hundred (200) amperes rated capacity shall be tested at least once in every eighteen (18) months.
C Meters exceeding two hundred (200) amperes up to and including four hundred (400) amperes rated capacity shall be tested at least once in every twelve (12) months.
D. Meters exceeding four hundred (400) amperes rated capacity shall be tested at least once in every six (6) months.
Section 9. All types of alternating current meters installed upon consumers' premises shall be periodically tested in accordance with the following schedue:
A. Single-phase meters up to and including twenty-five (25) amperes rated capacity shall be tested at least once in every thirty-six (36) months.
B. Single-phase meters exceeding twenty-five (25) amperes rated capacity shall be tested at least once in every twenty-four (24) months.
C Polyphase meters up to and including one hundred and fifty (150) amperes rated capacity shall be tested at least once in every twenty-four (24) months.
D. Polyphase meters exceeding one hundred and fifty (150) amperes rated capacity shall be tested at least once in every twelve (12) months.
E. Single or polyphase meters installed on circuits having a voltage of two thousand (2,000) volts and over shall be tested at least once in every six (6) months.
Rules for Meter Testing
Section 10. All tests on watt-hour meters in service provided for in these rules shall be made in the place of permanent location on the consumers' premises and under local conditions of operation.
Section 11. Meters installed with current or potential transformers, or with shunts may be tested independently provided such corrections as are shown on the calibration certificate are applied in the determination of the results obtained, otherwise the meter shall be tested in combination with its transformers or shunts.
Section 12. Whenever the primary circuit supplying a current transformer connected to a watt-hour meter can not be open circuited for the purpose of testing, then an approved type of protective device shall be permanently installed to short-circuit the transformer secondary when desired, so that the possibility of injury to employees or the changing of the transformer ratio is minimized.
Section 13. In periodic or ofiice tests, the calibration certificate of the transformer or the shunt shall be dated within a period of ten (10) years preceding the time the meter is tested.
Section 14. In complaint tests, the Commission will accept the calibration certificates of the transformers or the shunts provided they are dated within a period of one year preceding the time the meter is tested.
Section 15. Shunts may be permanently installed for obtaining current measurements for the purpose of testing direct current watt-hour meters exceeding eight hundred (800) amperes capacity provided there is on file a calibration certificate of the shunt dated within the period stated in Section 13 for periodic or ofiice tests, or as stated in Section 14 for complaint tests.
Section 16. All meters tested as defined in Section 2 (Periodic Tests) shall be tested at three load points as specified below:
Light load, at 10% of rated meter capacity.
Normal load, at a point falling within 50% to 60% of rated meter capacity.
Full load, at a point falling within 85% to 100% of rated meter capacity.
When meters are connected to and tested with transformers or shunts, the nominal rating of the transformers or shunts shall be considered as the rated meter capacity.
Section 17. Classification and percentage of installation to be used when testing meters at normal load on Complaint or Ofiice tests:
A. Residence and apartment lighting 25%
B. Elevator Service 40%
C. Factories (individual drive), churches and offices 45%
D. Factories (shaft drive), theatres, clubs, entrances, hallways
and general store lighting 60%
E. Saloons, restaurants, pumps, air compressors, ice machines
and moving picture theatres 70%
F. Sign and window lighting and blowers, battery charging,, 100%
Section 18. When a meter is found to be connected to an installation consisting of two or more of the above classes of loads, the normal load shall be obtained by multiplying the connected watt load of each class by the percentage specified above and adding the results.
Section 19. The normal load determination for Complaint and Office Tests shall include every power lighting and heating device found so connected that the same may be properly operated by installing fuses, closing a switch or operating a controlling device or any combination of these three methods.
Section 20. The final average accuracy of Complaint and Office Tests obtained by multiplying the result of the test at normal load by three, adding the results of the tests at 10% capacity and 100% capacity and dividing the total by five, shall be deemed the condition of the meter and such final average shall be reported to the Commission on the form prescribed by it. For Periodic Tests the final average shall be determined as above for light, normal and full loads. (See Section 16.)
Section 21. Three tests shall be made at each load at which the meter is tested, but should any two fail to agree within one per cent., additional tests shall be made until three results are obtained which do not vary one from another more than one per cent.
Section 22. All meters shall be adjusted so as to register with an error of not more than one per cent, at 10 per cent, and at 100 per cent, capacity (light and full loads) and both of these adjustments shall be maintained in this 'condition as nearly as possible.
Determination of Creep Section 23. A watt-hour meter shall be considered to be creeping when, on no load, the disk rotates at the rate of one revolution in five minutes or less. The observation shall be made with all house wires removed from the meter and with no current flowing in the consumer's circuit. All meters in service shall be left without creep.
Test upon Application
Section 24. Upon written application by a customer or electrical corporation to the Commission, a test shall be made on the meter by an inspector employed by the Commission, such test to be made as soon as practicable after receipt of application. For such test a fee as scheduled below shall be paid by the applicant at the time application is made. If the meter is found to be correct or slow as averaged by the method herein specified (Section 20), this fee will be retained. If the meter is found to be more than four (4) per cent, fast, as averaged by the same method, the fee will be refunded to the customer and collected from the electrical corporation owning the meter, when the electrical corporation is the applicant for test, the fee will be retained by the Commission. The consumer and the electrical corporation will be notified as to the time and date of test. The electrical corporation should have a representative present to open, adjust if necessary, and seal the meter. The electrical corporation's representative may connect his testing instruments and test jointly with the Commission's inspector.
Fees for Testing Watt-hour Meters
Ampere Capacity Fee
3 — 10 $1. 50
12— 15 2.00
20 — 25 2. 50
30— <50 3.00
150 5 . 00
400 10. 00
450 11. 00
800 18. 00
1000 22. 00
Other fees upon application.
Standardizing Laboratory Section 26. The electrical laboratory of an electrical corporation may be approved as a standardizing laboratory provided it is equipped with acceptable types of precision instruments, standards and other necessary apparatus, installed and maintained in a manner acceptable to the Commission,
A standardizing laboratory may certify meters and instruments for testing purposes for its own use and for other electrical corporations.
Meter Testing Facilities and Equipment
Section 27. Each electrical corporation shall, unless specifically excused by the Commission, provide for and have available such laboratory, standard meters, instruments and other facilities as may be deemed necessary to properly make the tests required by the rules herein contained. Such equipment and facilities shall be acceptable to the Commission and shall be available at all reasonable times for inspection by the Commission's Chief Inspector of Electric Meters or his authorized representative.
Section 28. For determining the accuracy of portable watt-hour meters, commonly called rotating standards and other portable instruments used for testing service watt-hour meters, the electrical corporation shall provide for and have available as reference standards suitable indicating electrical instruments mounted in a permanent position.
Reference standards shall be certified once in every two months by comparison with the standards of a standardizing laboratory or the standards of the Commission or by specific permission the standards of other laboratories.
Portable Rotating Standards
Section 29*. All portable watt-hour meters (rotating standards) shall be compared with the reference standards at least once a week for commutator types and once in two weeks for induction types during the time such portable standards are regularly used. If such comparison shows a portable standard to be in error more than one (1) per cent plus or minus at any load at which the standard will be used, it shall be adjusted and certified by comparison with reference standards in the company's own laboratory before being again used. Each portable watthour meter (rotating standard) shall at all times be accompanied by a certificate, signed by the proper authority, giving the date when last certified and the company's or the manufacturer's number. The accuracy certification may be shown in per cent accuracy of the portable standard or in the correction in per cent to be applied at the various ampere loads on one or more voltage ranges or both percentages may be shown. The certificates shall be uniform in size and arrangement of form.
Portable Indicating Standards
Section 30. All portable indicating electrical testing instruments when in regular use for testing purposes shall be checked against suitable reference standards at least once a week when continually in use and if found appreciably in error at zero or in error more than one per cent of full scale value at commonly used scale deflections, shall, unless accompanied by a calibration card, be adjusted and certified by comparison with reference standards in the company's own laboratory.
Section 31. Recommended form of calibration card:
Reporting Tests of Watt-hour Meters
Section 32. Such reports shall be made for the calendar month and shall be filed not later than the fifteenth of the following month.
Section 33. All reports of complaint, periodic and office tests shall be made in the form designated "Complaint, Periodic and Office Tests" hereto attached.
Section 34. All reports of service tests shall be made in the form designated "Service Tests" hereto attached.
Section 35. The designated report forms, as hereto attached, shall be printed on sheets 8-^ x 11 inches,
Section 36. Form of report.
Complaint, Periodic and Office Tests
Watt-hour Meter Tests made during the month of , 19. .
Final Average Accuracy No. of Meters Percentage
96% to 104%
More than 104%.
96% to 104%
More than 104%.
96% to 104%
More than 104%.
N. B. A complaint test is a test of a watt-hour meter made by an electrical corporation upon the premises where the meter is installed, as a result of a complaint of the consumer.
A periodic test is a test of a watt-hour meter made by an electrical corporation in the regular course of its business upon the premises where the meter is installed, but not at the time of installation, which test is not made as a result of a complaint from the consumer nor by direction of the corporation, of an officer or of an employee that a special test be made.
An office test is a test of a watt-hour meter made by an electrical corporation upon the premises where the meter is installed, by direction of the corporation itself, of an officer or of an employee that a special test be made.
The above report is a correct summary of all watt-hour meter tests made by this Company, and all tests were conducted according to the rules of the Public
Service Commission as prescribed in Final Order in Case 2202
Signed by ,
Section 37. Form of report.
Watt-hour Meter Tests made during the month of 19... By
N. B. A service test is any test of a watt-hour meter made on a consumer's premises within a specified period after the introduction of the type on the company's system.
For a direct current type the period shall be two years.
For an alternating current type the period shall be three years.
Tests at 100% of Meter Tests at 10% of Meter
No. of Per- Accuracy No. of Per
Meters centage Per cent Meters centage