Toolbox Talk: Understanding Electricity and Breaker Panels

Toolbox Talk: Understanding Electricity and Breaker Panels

The process of forcing electrons to move through a material creates electricity. A standard generator performs this process. The best material for carrying electricity is a “conductor.” Most metals are excellent conductors and the most common material used for electrical wiring is copper.

In order to provide protection from direct contact with the conductor, an “insulator” is used as a cover around the conductor. Electrons will not move easily through insulators such as most plastics and rubber. Insulators and proper grounding help to prevent electrical shocks.

Typically, electricity is provided to your building or facility by way of underground or overhead power lines originating from a nearby electrical power plant. The power lines feed into your electrical breaker panel(s). Each breaker in a panel represents a circuit supplying electricity to a designated area of your building. The majority of your electrical safety considerations begin at the breaker panel.

Here are some basic safety considerations for all panels:

The breaker panel should be readily and easily accessible at all times. Do not store any items on the floor area directly in front of the panel. Maintain an aisle in front of the panel that is at least three feet wide.

The panel should have a closed cover. The cover should not be locked unless work is in progress requiring that the cover be locked as part of the lock out procedure.

The panel should have a directory index identifying each individual circuit breaker. It is usually found secured to the inside face of the cover. The directory should identify the various receptacles, general area, or equipment serviced by each circuit breaker.

There should not be any missing breakers or other openings in the breaker faceplate that would allow you to contact the “hot” electrical bus at the back of the panel. Dust may damage the breakers to the point where they will not “trip” when needed.

Breakers should never be taped or otherwise secured in the “closed” (on) position. Each circuit breaker and circuit is rated for a maximum amount of amperes. An ampere is the unit for measuring the rate of flow of electricity through the circuit. If the rate of flow in the circuit exceeds the designated maximum for the breaker, the breaker “trips” and stops the flow of electricity. If the breaker is not allowed to trip, insulators could melt from excessive conductor heat caused by electricity flowing too fast! Fires or increased exposure to shock may also occur.

Lastly, breakers should not be taped in the “open” position as a means of de-energizing the circuit during repair or maintenance activity. Open breakers should be properly tagged or locked out.


Not all staffing companies are the same.

We believe in doing the right thing and communicating openly and honestly. These traits may not be common in construction staffing, but they serve as our foundation at Construct Corps. Our services are priced fairly and we recommend the best solution, even if it is not one we offer.

Construction staffing done right is the combination of these principles along with our refined recruiting methods, quality management processes and high staffing success rate.

5 Reasons We’re Different:

  • Centralized recruiting operations make it possible to for you to receive the same high level of service – no matter where your business takes you
  • Flexible staffing options to fit your needs: temporary staffing, temp-to-perm, or direct hire
  • We have a proven track record of placing highly skilled candidates with leading contractors across the nation
  • Extensive construction industry experience
  • Well-developed network of construction industry leaders and an abundant database of skilled workers and professionals

Offering superior service since 2000, Construct Corps is a skilled trades construction staffing company, providing qualified workers to commercial, industrial, and residential contractors.

Need more information? Call 1.866.532.6777 x 103 or email us.





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