Miller ISO / Blocks

With the Miller ISO/Block™, exceptional performance also protects workers from high-voltage hazards.

The ISO/Block integrates our Miller HI-LIFT block and Miller ISO/Link-AC into one assembly designed to protect workers in case of accidental boom or wire line contact with overhead power lines, which is the single leading cause of electrical injury in the workplace and an increasing area of focus of US workplace safety regulators.

Also, very useful for isolation in in-plant operations or other hazardous locations.

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Electrical Protection:

  • Molded polymer insulation
  • Weatherproof / durable
  • Rated to 25,000 volts AC
  • Tested at 50,000 volts AC
  • Individually certified


Mechanical Integrity:

  • Load ratings to 120 tons
  • Design safety factors
    – ISO/Link, 5:1
    – Block, 4:1
    – ISO/Block, 4:1
  • Unique interlocking plate construction



  • Available in a number of configurations and capacities
  • Simple annual electrical certification test by Miller or by customer


All product warnings: Warnings Page
single product