(E) Electrical Safety Precautions

Question 1

About Human Body

Answer 1

• Body Resistance 1 kilo-ohm to 500 kilo-ohm
• 5 mA is the highest current safe for the average body
• 12m mA muscles will contract
• 25 mA is known to be fatal

Question 2

High Voltage Precaution

Answer 2

• Tools and equipment containing exposed metal parts should not be used in any area within 4 feet
• Do not wear loose or flapping clothing
• Do not use thin soled shoes with metal plates
• Before touching a capacitor, short-circuit the terminal to ensure it is completely discharged
• Using one hand is not an electrical hand

Question 3

Low Voltage

Answer 3

BEWARE of voltage greater than 15 V

Question 4

Electrical Fire

Answer 4

• Cut off the electrical supply to the fire zone
• Call fire department
• To combat electrical fire, use a carbon dioxide fire extinguisher

Question 5

Battery Safety Precaution

Answer 5

• Danger of acid burn while refilling,topping up
• Danger of explosion due to short circuit while batteries are being charged
• Hydrogen gas due to charging - highly explosive
• Ensure adequate ventilation

Question 6

RADAR Ground Safety

Answer 6

• Keep antenna scan sector clear of large metallic objects
• Tilt dish upwards
• Do not operate RADAR during refueling ops
• Do not operate RADAR if personnel are within the safety zone
• Set up cordons and warning signs