Safety Precautions

1.  Fire regulations prohibit use of highly flammable materials or decorations in project displays. Background panels must be of masonite, pegboard, hardboard, wood or foam core board, to which poster paper, cardboard or fabric may be attached.

2.  No dangerous or combustible solids, liquids or gases may be exhibited. Cylinders, tanks and/or other containers that have held such substances, unless thoroughly cleaned and/or purged with carbon dioxide, are also prohibited. Rockets MUST NOT contain fuel.

3.  No flames, open or concealed, are permitted in the display building.

4.  No syringes, pipettes or similar devices may be displayed.

5.  Devices producing temperatures in excess of 100 C must be adequately insulated.

6.  The following electrical safety rules must be observed: devices (vacuum tubes, lasers, etc.) which generate dangerous rays must be properly shielded.

  • Wiring must be properly insulated and fastened.
  • Wiring, switches and metal parts of high voltage circuits must be located out of reach of observers and must include an overload safety device.
  • High voltage equipment must be shielded with a grounded metal box or cage to prevent accidental contact.
  • Approved connecting cords of the proper load-carrying capacity must be used for 110-volt operation of lights, motors, transformers and other equipment.
  • Standard switches must be used for 110-volt circuits. Open knife switches or bellringing push buttons are not acceptable for circuits exceeding 12 volts.
  • Batteries with open top cells (wet cell batteries) are not permitted.
  • Electrical connections in 110-volt circuits must be soldered or fixed under approved connectors and have connecting wires properly insulated.
  • Electrical circuits for 110-volt AC must have an Underwriters Laboratory approved cord (or proper load carrying capacity) at least 2 meters long and equipped with a standard grounded plug.

7.  Only Class I and Class II lasers may be operated at the Fair. These lasers must (1) have a protective housing or barricade preventing human access to the beam during operation, (2) be disconnected from the power source when not in operation, (3) be operated only in the presence of the exhibitor, and (4) when displayed, be accompanied by the following sign: LASER RADIATION; DO NOT STARE INTO BEAM.

Download the Science Safety Handbook


The Los Angeles County Science and Engineering Fair Committee, its Board of Directors, the Los Angeles County Office of Education, the Board of Supervisors for Los Angeles County, volunteers and representatives of sponsoring organizations for the 62nd Annual Los Angeles County Science Fair, shall be held harmless for injury or death of persons or damage and/or loss of property occurring in connection with the Los Angeles County Science Fair.