substation crushed stone

  • Electrical Substation Surface Material Resistivity Testing ...

    Electrical Substation Surface Material Resistivity Testing Interior Corrosion Services can perform resistivity testing for crushed rock surface material supply for sub-station construction. A minimum sample size of 40-Litres is required for our testing purposes.

  • SUBSTATION CONSTRUCTION STANDARDS

    2 02511 General Requirements for Crushed Stone Paving 2 11/14/17 2 02513 General Requirements for Asphaltic Concrete Paving 1 7/9/13 2 02720 General Requirements for Storm Drainage Systems 1 11/15/17 2 02730 General Requirements for Sanitary Sewage Systems 1 9/1/17 2 02831 General Requirements for Substation Fence and Gates

  • Surface Material for Substation Ground Grid - Electric ...

    Oct 30, 2008 · I have seen some extreme cases where it was not possible to achieve an acceptable value using crushed stone so entire substations were paved with asphalt. It is a somewhat rare case and definitely a more expensive option, but in a few cases maybe the one of the only ways to acheive the the design criteria. RE: Surface Material for Substation ...

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  • What You Need to Know About Substations - Incident ...

    Feb 01, 2009 · The crushed stone bed provides an insulating buffer between workers and the mat. The stone layer's resistance is sometimes 3,000 ohms/meter or more between the worker and the mat. A common question about equi-potential in substations comes up often: "Why add resistance to the mat if you want equi-potential?"