Statutes, codes, and regulations
California Code Of Regulations
Title 4 - Business RegulationsDivision 9 - Division of Measurement Standards, Department of Food and AgricultureChapter 1 - Tolerances and Specifications for Commercial Weighing and Measuring Devices
Article 2.2 - Electric Watthour Meters
Section 4027.3 - N. Notes

Cal. Code Regs. tit. 4 § 4027.3

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Current through Register 2024 Notice Reg. No. 24, June 14, 2024
Section 4027.3 - N. Notes
N.1. Meter Creep Test. A meter creep test shall be conducted by applying rated voltage to the meter under test and no load applied.
N.2. Meter Starting Load. A meter starting load test shall be conducted by applying rated voltage and 0.5-ampere load.
N.3. (MM) Test Revolutions. Full and light load tests shall require 8 or more revolutions of the test standard and at least one revolution of the meter under test.
N.4. (EM) Meter Test Constant Output Indications. Full and light load tests shall consist of 8 or more watthour test constant (Kt) output indications of the test standard and at least one watthour test constant (Kt) output indication of the meter under test. Test standards that read out directly in watthours shall meet the watthour equivalent of 8 or more watthour test constant (Kt) output indications.
N.5. Meter and System Test Loads.
(a) (MM) Mechanical self-contained meters shall be balanced load tested, and may be single element tested, for meter accuracy at full and light loads.
(b) (MM) Instrument transformer rated systems shall be single element tested, and may be balanced load tested, for system accuracy at full and light loads. Meter testing shall be accomplished by applying the test load to the current transformer(s).
(c) (EM) Instrument transformer(s) rated systems shall be single element tested, for system accuracy at full and light loads. Meter testing shall be accomplished by applying the test load to the instrument transformer(s) with the voltage circuits energized.
(d) The reference voltage phases (A, B, or C) at the meter shall be the same phase as the load.
N.6. Test of a Meter System.
(a) Each meter submitted for test shall be a complete system. For example: a meter body and any necessary instrument transformer(s), indicator(s), system software, etc., required to make up a complete system.
(b) The test load applied for a full load test shall be the marked test amperes (TA) on the nameplate of the meter under test.
(c) The test load applied for a light load test shall be conducted at not less than 10% of the marked (TA) test amperes on the nameplate of the meter under test.
(d) The test load applied for a full load test of a meter for a 0.5 power factor setting shall be the marked (TA) test amperes of the nameplate of the meter under test.
(e) The test load applied for a light load test of a meter for a 0.5 power factor setting shall be conducted at not less than 20% of the (TA) test amperes of the meter.
(f) All tests shall be made at the rated voltage ± 10%.

Cal. Code Regs. Tit. 4, § 4027.3

1. New section filed 1-13-2009; operative 2-12-2009 (Register 2009, No. 3).

Note: Authority cited: Sections 12027 and 12107, Business and Professions Code. Reference: Section 12107, Business and Professions Code.

1. New section filed 1-13-2009; operative 2-12-2009 (Register 2009, No. 3).