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BS 4145

67th Edition, March 31, 1967

Complete Document

Specification for Glass Mica Boards for Electrical Purposes

Includes all amendments and changes through Reaffirmation Notice , May 1, 2017


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Product Details:

  • Revision: 67th Edition, March 31, 1967
  • Published Date: May 1, 2017
  • Status: Active, Most Current
  • Document Language: English
  • Published By: British Standards Institution (BSI)
  • Page Count: 22
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

Requirements for two types of board for electrical purposes made from glass bonded mica powder, from 1⁄8 in (3.2 mm) up to 1⁄2 in (12.7 mm) in thickness. Definitions, classifications, finish, flatness, thickness, electric strength proof test in oil, surface electric strength proof test in air, insulation resistance, carbon arc test, spirit burner test, water absorption, deformation under compression, shear strength and cross breaking strength. Methods of test given in appendices.