SECTION 16960 TESTING ELECTRICAL SYSTEMS
PART 1 GENERAL
1.1 RELATED REQUIREMENTS
A. Applicable provisions of Division 1 shall govern work under this Section.
1.2 SCOPE
A. Prior to energizing equipment, retain services of a recognized independent testing contractor for purpose of performing inspections and tests as herein specified.
B. Assure that electrical equipment is operational within industry and manufacturer's tolerances and is installed in accordance with design specifications.
1.3 ITEMS TO BE TESTED
A. Panelboards
B. Transformers
C. Circuit Breakers
D. Grounding Systems
E. Remote instruments/sensors
F. Motor Control Centers
G. Standby Generator Systems
H. Automatic Transfer Switches
I. Motors
J. Feeder Circuits
1.4 QUALITY ASSURANCE
A. Comply with the requirements of the following regulatory agencies;
1. National Fire Protection Association (NFPA), chapter 70 National Electrical Code (NEC) and Wisconsin amendments thereto.
2. Underwriters' Laboratories, Inc. (UL).
3. O.S.H.A.
B. Conform to the standards of the following agencies;
1. National Electrical Manufacturer's Association (NEMA)
2. American Society for Testing and Materials (ASTM)
3. Institute of Electrical and Electronic Engineers (IEEE)
4. National Electrical Testing Association (NETA)
5. Insulated Power Cable Engineers Association (IPCEA)
C. Inspections and tests shall utilize the following references:
1. Project design specifications.
2. Project design drawings.
3. Manufacturer's instruction manuals applicable to each particular apparatus.
1.5 TESTING AGENCY
A. Meet federal, state, and local safety requirements for accreditation of testing laboratories, Title 29, Part 1907. Membership in National Electrical Testing Association constitutes proof of meeting such criteria.
B. Meet Federal Department of Commerce requirements for nationally independent testing laboratory certification.
C. Permanently record checks and tests and make copies available to Engineer and Owner.
1.6 TEST REPORT SUBMITTALS
A. Seven copies of complete testing report.
B. Submit report no later than 30-days after completion of testing.
C. Submit proof of testing agency qualification.
1.7 JOB CONDITIONS
A. Electrical contractor's responsibilities.
1. Supply a source of test power to test laboratory at each test site.
2. Notify testing Subcontractor when equipment becomes available for acceptance tests.
3. Coordinate work to minimize project delay.
4. Supply a complete set of electrical drawings, specifications, and pertinent change orders to testing contractor prior to commencement of testing.
B. Testing subcontractor's responsibilities.
1. Notify Engineer 72 hours prior to commencement of testing.
2. Provide material, equipment, labor, and technical supervision to perform such tests and inspections.
3. Recommendations for acceptance or rejection shall be given upon consultation of Engineer, Owner, Contractor and testing laboratory's representative.
PART 2 PRODUCTS
A. Not used.
PART 3 EXECUTION
3.1 GENERAL
A. Test work and equipment installed to ensure its proper and safe operation in accordance with intent of drawings and specifications.
B. Check interlocking and automatic control sequences and test operation of safety and protective devices.
C. Correct defects.
D. Cooperate with electrical utility, supplier's, and manufacturer's representatives in order to achieve proper and intended operation of equipment.
E. Test, adjust and record operating voltages at each system level before energizing branch circuits.
F. Transformer taps must be adjusted to obtain as near as possible nominal system voltage.
G. Where transformer is under utility jurisdiction, obtain services of utility to correct voltage.
H. Replace devices and equipment damaged due to failure to comply with this requirement.
I. Balance load among feeders conductors at each panelboard, switchboard, or substation, and reconnect loads as may be necessary to obtain a reasonable balance of load on each phase. Electrical unbalance shall not exceed 7½% between phases. Submit test results on the appropriate sheet found at the end of this section.
3.2 GROUNDING SYSTEMS
A. Inspect ground system for compliance with drawings and specifications.
B. Electrical Tests
1. Fall of Potential test per IEEE Standard No. 81, Section 9.04 on main grounding electrode or system.
2. Two Point Method test per IEEE Standard No. 81, Section 9.03, to determine ground resistance between main grounding system, and major electrical equipment frame, system neutral and/or derived neutral points.
3. Alternate to the Two Point Method.
a. Ground continuity test between main ground system and equipment frame, system neutral and/or derived neutral point.
b. This test shall be made by passing a minimum of 10-amp dc current between ground reference system and ground point to be tested.
c. Voltage drop shall be measured and resistance calculated by voltage drop method.
3.3 MOTOR CONTROL CENTERS AND MOTORS
A. Inspect for physical damage, proper anchorage and grounding.
B. Compare equipment nameplate data with design drawings or starter schedule.
C. Compare overload heaters with motor nameplate data for proper size.
D. Main breakers incorporating ground-fault sensing shall be adjusted by the contractor in accordance with the manufacturer’s recommendations and guidelines.
3.4 FEEDERS
A. Each feeder shall be megger tested for insulation resistance.
B. Submit test results on the appropriate sheet found at the end of this section.
3.5 MOTORS
A. Motor testing shall be performed as specified in Section 16481.
B. Submit test results on the appropriate sheet found at the end of this section.
3.6 STANDBY GENERATOR SYSTEMS
A. Witness the entire load test and verify test results for each generator.
3.7 AUTOMATIC TRANSFER EQUIPMENT
A. Witness load test and verify test results.
END OF SECTION
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