How to Set Up Electrical Utility for Construction Crews

Utility Power

• 1

  Decide which electric power source is preferable. Electricity for construction job sites is provided by a hookup to the local utility which supplies power to temporary electrical panels installed on-site or by gas-powered generators.

• 2

  Consider what could go wrong. Temporary power presents a set of challenges not present when working with installed permanent power. The use of long extension cords to power tools and machinery can lead to overload, burn and shock hazard, particularly in wet conditions. Temporary power panels and cables must be clearly marked and all trades working at the site must be aware of their location and conscious of all hazards.

• 3

  Consult with an electrical contractor. Many contractors sub-specialize in onsite power for construction crews. To estimate the total load, take into consideration the size of the project and confer with the general contractor to determine what kind of equipment onsite requires electrical power. Make sure the power requirements of all trades involved in the total duration of the project are figured into the load calculation. Include an allowance for unknown load requirements that may arise.

• 4

  Pre-plan with the local utility. Submit a temporary power load summary and receive the utility's approval, plans and schematics for supplying electricity.

Generator Power

• 5

  Use generators at sites a significant distance from existing electrical utilities.

• 6

  Determine the size of the generators needed based on the load requirements of the site. Make arrangements in advance to rent generators and required distribution panels.

• 7

  Consider fuel requirements of the generators and the logistics of obtaining and storing adequate fuel supply.

• 8

  Be aware of the unique environment of a construction site versus the use of generators at other applications. Power cables and connectors must be heavy duty and weatherproof. All lines providing power to hand tools and machinery should be protected with ground fault interrupters to minimize shock hazard from water or in the event a cable is accidentally cut.