Bid document

SECTION 26 05 73

overcurrent PROTECTIVE DEVICE coordination STUDY
SPEC WRITER NOTE: Use this section only for NCA projects. Delete between // // if not applicable to project. Also, delete any other item or paragraph not applicable in the section and renumber the paragraphs. This section shall be included in all projects requiring new electrical systems, or modification to existing electrical systems. Purpose of this specification is to ensure that the selected manufacturer’s equipment shall perform as intended.

PART 1 GENERAL

1.1 DESCRIPTION

A.This section specifies the overcurrent protective device coordination study, related calculations, and analysis, indicated as the study in this section. B.A short-circuit and selective coordination study, and arc flash calculations and analysis shall be prepared for the electrical overcurrent devices to be installed under this project. SPEC WRITER NOTE: For renovation projects, insert the limits of the study in the blank space if a study of the entire electrical system is not specified.

1.2 RELATED WORK

A.Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS: General electrical requirements that apply to more than one section of Division 26. B.Section 26 24 13, DISTRIBUTION SWITCHBOARDS: Low-voltage distribution switchboards. C.Section 26 24 16, PANELBOARDS: Low-voltage panelboards. D.Section 26 32 13, ENGINE GENERATORS: Engine generators. E.Section 26 36 23, AUTOMATIC TRANSFER SWITCHES: Automatic transfer switches.

1.3 qualITY ASSURANCE

A.Refer to Paragraph, QUALIFICATIONS (PRODUCTS AND SERVICES), in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS. B.The study shall be prepared by the equipment manufacturer, and performed by licensed electrical engineer or qualified person with professional experience and credential as required by the NEC.

1.4 SUBMITTALS

A.Submit six copies of the following in accordance with Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS. 1.Product data on the software program to be used for the study. Software shall be in mainstream use in the industry, shall provide device settings and ratings, and shall show selective coordination by time-current drawings. 2.Complete study as described in paragraph 1.6. Submittal of the study shall be well-coordinated with submittals of the shop drawings for equipment in related specification sections. 3.Certifications: Two weeks prior to final inspection, submit the following. a.Certification by the Contractor that the overcurrent protective devices have been set in accordance with the approved study.