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The Safety Security Management System is designed to be regularly updated to the latest information by linking with the following computer system to improve the accuracy and effectiveness of information.
- Academic Affair System: Info. on the persons engaged in research activities
- Space management system: Laboratory info., full-time persons who engage in research activities, information on the equipment to manage

The Lock function should be set not to automatically update the laboratory information or informationon the equipmentto manage

Chonnam National University Laboratory Safety Management Center

Electrical Safety
Prevention against Electrical Accidents
  • Preventative measures for electric shock

    The possibility of the occurrence of electrical accidents is not so high. However, once an electrical accident happens, there is a very high possibility to have severe damages such as death or significant property damage.
    An electric shock happens in an instant and results in serious consequences. Thus, people should take full measures to prevent such accident.

    • General preventative measures
      • All live parts of electrical equipment or wiring should not be exposed.
      • For using electrical equipment, earth must be done.
      • Install a circuit breaker to prevent the damages, caused by electric shock.
      • Only designated people should operate the switches of electrical equipment.
      • Do not touch electrical equipment with wet hands.
      • Always use rated fuses for switches. Do not use copper/iron wires.
      • Do not use broken or malfunctioning electrical systems.
      • Do not use a wire with a connection part in the middle.
  • Preventative measures for electrical fire

    The possibility of the occurrence of electrical accidents is not so high. However, once an electrical accident happens, there is a very high possibility to have severe damages such as death or significant property damage.
    An electric shock happens in an instant and results in serious consequences. Thus, people should take full measures to prevent such accident.

    • Measures for electrical equipment
      • Electrical equipment wiring
        Prohibition of cord connection A cord should be short as much as possible. If it needs to be extended, do not twist it but use a cord connector.
        Prohibition of fixed cord use If a cord is fixed with a nail or a staple, its sheath may be damaged and short circuit may occur, or the wire may be squeezed, bent, and disconnected. At the time, the flame caused by the short circuit may ignite. Thus, do not fix a cord with a nail or a staple.
        Use of wires with proper thickness When using electrical equipment, its wire should have a proper thickness considering its capacity. Do not connect multiple power plugs to one outlet.
      • Wiring equipment

        Conventional wiring equipment should be used within the rated range.
        As it may have bad conditions such as overheating in wire connection and contact parts, pay attention to the following items:

        • - Cable tightening part or contact surface of a switch
        • - Use of a fuse with proper capacity
        • - Contact status of outlets and plugs and how to handle them
        • ※ Do not connect multiple power plugs to one outlet. A power plug should be completely connected with an outlet to prevent overheating caused by connection failure.
    • Electrical equipment and device
      Electric furnace and electric dryer - Do not place flammable materials around the heating parts of electric furnaces or electric dryers.
      - According to the type of a material to be dried, prevent it from being fallen and secure enough distance from a heat source.
      - Be careful that the sheaths of wires near facilities and connections may be damaged or overheat.
      - Install a device that automatically blocks the power when the temperature inside a furnace abnormally increases.
      - Do not place flammable materials around the heating parts of electric furnaces or electric dryers
      Heater - There should be a heat insulating board at the bottom of the hotplate
      - Heater On/Off should be clearly set (with an indicator lamp).
      - Its support should be made of insulated non-combustible materials such as artificial stone, asbestos, and brick.
      - Keep combustible materials away from a heater (horizontally 0.3 ~ 0.5 m and vertically 1.0 ~ 1.5 m from it).
      - The capacity of its wire and cord should be enough to prevent overheating.
      Lamp - If there are flammable materials, take the following actions to prevent fire caused by a broken lamp.
      - A bulb should be protected by using a globe or a metal guard
      - Decrease the number of lighting fixtures or do not install them in warehouses with hazardous materials. (Install an explosion-proof system.)
      - Do not use a metal socket but a synthetic resin one so as not to expose the connection part.
      - A portable light bulb should be equipped with a cabtyre cord and there should be no connection parts.
    • Measures for electrical equipment
      • Prevention of short circuit and mixed contact short circuit
        Thorough moveable wire Fixed equipment must have fixed wiring, and moveable wire used in a place where a heavy object is moved should be processed and installed or installed in a strong protective pipe.
        Reinforcement of wire lead-out part To prevent short circuit, install a bushing on the wire lead-out part to prevent the damage, and insert a spring to decrease the bending of the wire so that the wire is not distorted when the equipment is used.
        Use of rated wire It is prohibited to use a vinyl cord for indoor wiring. Use a proper wire meeting related standards considering its use.
        Inspection/Repair after turning the power switch Off When equipment is inspected or repaired while the power switch is turned on, a fire caused by short circuit may break out. For the inspection or repair, the power supply should be stopped.
      • Prevention of power leakage

        The most important thing to prevent power leakage is to avoid overheating, moisture, corrosion, etc., which are the causes of dielectric breakdown.
        In addition, it is necessary for the live part and an insulating material to be separated from a structural material, a water pipe, or a gas pipe frame of
        other metal body buildings.

        • - To prevent a power leakage fire, install an electric fire alarm (power leakage fire alarm) in a necessary place.
        • - When an electrical system is used in a humid place, take actions against the moisture. It should be processed as a moisture-proof one.
        • - A wire connection should use a connection device or tape for sufficient insulation effect.
        • - Frequently check if there is power leakage and check if an earth leakage circuit breaker is installed.
      • Turn the power switch off when the power is not used.
        • - Thorough safety inspection
        • - To prevent an electric fire, regularly check the items that need to be inspected (e.g. monthly, daily, quarterly inspection).
  • In case an electrical equipment is not used, turn its power off, and unplug and store it.
    • Measure against places with explosion hazard

      Prevention of short circuit and mixed contact short circuit
      such as a place where flammable liquid vapor or flammable gas is treated or handled or a place where flammable dust is produced or used,
      it should have an explosion-proof structure with the explosion-proof function suitable against the steam/gas or dust. It should be always maintained and managed so that its performance should be always secured.