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Minnesota Department of Labor and Industry

Portable road construction plants and similar setups

Unless otherwise exempt under the U.S Dept. of Labor Mine Safety and Health Administration statutes, electrical wiring for portable generators, road construction plants, concrete plants, crushers, conveyors, pumps and similar temporary electrical systems are regulated by and must be installed in accordance with the requirements of the Minnesota Electrical Act.

30TPH Portable&Mobile Asphalt Batching Mixing Plant, Road Construction MachineAs part of the set up at each location, employees are permitted to install the grounding electrodes and connect portable cords or cables that terminate in separable connectors or in permanently installed, color-coded lugs and terminal blocks.

If the owner employs a master electrician and has registered with the department, the electrical work can be performed by licensed or properly supervised registered unlicensed employees; otherwise all electrical wiring and repair work must be performed by employees of a licensed electrical contractor.

At or before the first move of the year, the equipment owner must schedule an initial inspection of all generators and electrical distribution equipment prior to it being energized or put into use.┬áThe inspection fees are calculated in accordance with Minn. Stat. 326B.37.

In addition, the generator or power supply and the electrical distribution must be inspected at each site when the equipment is repositioned. A Request for Electrical Inspection (electrical permit) must be filed for each location and the owner must arrange for the inspection.

Electrical wiring

Installations of electrical wiring and equipment must meet the provisions of the most recently adopted edition of the National Electrical Code. All documented code violations must be corrected by properly licensed persons and inspected for compliance.

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