Electrical Frequently Asked Questions and Knowledge (3)

Update date:2018-03-25 Source:MAXGE

 Electrical Frequently Asked Questions and Knowledge (3) 

1. What measures do household safety use?

With the popularization and application of household appliances, it is very important to correctly grasp the knowledge of safe use of electricity and ensure the safety of electricity.

(1) Do not buy "three no" fake and shoddy household products.

(2) When using home appliances, there should be a complete and reliable power cord plug. Home appliances for metal enclosures must be grounded.

(3) Switches and fuses cannot be installed on the ground and neutral wires. It is forbidden to connect the grounding cable to tap water and gas pipelines.


(4) Do not touch the live device with wet hands, and do not wipe the live device with a damp cloth.

(5) Do not pull the cable and do not move the charged device.

(6) When checking and repairing home appliances, the power must be turned off.

(7) When the power cord of the household appliance is damaged, immediately replace it or wrap it with an insulating cloth.

(8) When there is a fire in a household appliance or wire, disconnect the power supply and then extinguish the fire.


  2. How to prevent burning of household appliances?

The rated voltage of commonly used household appliances is 220 volts, and the normal supply voltage is around 220 volts. When the power supply voltage is instantaneously increased due to a lightning strike or other natural disaster in the power supply line, the zero-phase fault occurs when the three-phase load is unbalanced, or the voltage rises due to phase voltage rise due to human error wiring. As a result, the current increases causing the household appliance to burn due to overheating. To prevent burning of household appliances, it is necessary to start from the following aspects: First, when the power equipment is not used, it should be disconnected as much as possible; second, transform the old and unrepaired receiver line; third, install the leakage switch with overvoltage protection.


  3, how to match the household fuse?

Household fuses should be selected based on the size of the capacity used. If a meter with a capacity of 5 amps is used, the fuse should be greater than 6 amps and less than 10 amps; if a meter with a capacity of 10 amps is used, the fuse should be greater than 12 amps and less than 20 amps, that is, the selected fuse should be 1.2 watts of the meter capacity. 2 times. The selected fuse should be one that complies with the regulations. It cannot use multiple fuses with small-capacity fuses. It cannot use copper wires instead of fuses.

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