1. When purchasing leakage protector, the manufacturer's products with production qualification should be purchased, and the product quality is qualified.Want to remind everybody here: the leakage current protective device that sells on the market has a lot of unqualified goods.On October 28, 2002, the general administration of quality supervision, inspection and quarantine of the People's Republic of China announced the results of sampling inspection on the quality of leakage protector products.Some can't protect the person from electric shock;Some should not trip when tripping, affecting the normal power consumption.

2. The power supply voltage, working current, leakage current and operation time and other parameters of the leakage protector should be determined according to the protection scope, personal and equipment safety and environmental requirements.

3. When the power supply adopts leakage protector for grading protection, it should meet the selectivity of upper and lower switch actions.Generally, the rated leakage current of the upper level leakage protection device is not less than the rated leakage current of the lower level leakage protection device, which can protect the safety of the person and equipment sensitively, and avoid skipping tripping, reducing the scope of accident inspection.

4. Portable electric tools (except category III), mobile household appliances (except category III), other mobile mechanical and electrical equipment, as well as electrical equipment with high risk of electric shock, must be installed with leakage protection.

5. Leakage protectors should be installed for electrical equipment in construction sites and temporary lines.This is explicitly required in the technical code for temporary electrical safety in construction site (jgj46-2005).

6. Electrical leakage protection must be installed in the electrical outlet circuit in government organs, schools, enterprises and residential buildings, as well as in guest rooms of hotels, restaurants and guest houses.

7. Installed in the power lines and equipment in the water and damp, high temperature, metal occupies larger coefficient and other conductive good places, such as machinery, metallurgy, textile, electronics, food processing industries of workplaces, and the boiler room, water pump room, dining room, bathroom, hospitals and other places, you must use the leakage protector for their own protection.

8. Power distribution box with leakage protector should be selected for fixed line electrical equipment and normal production and operation places.Temporary use of small electrical equipment, should choose leakage protection plug (seat) or with leakage protection socket box.

9. Leakage protector as a supplement to direct contact protection (not as the only direct contact protection), should choose high sensitivity, rapid action type leakage protector.Generally, the action current should not exceed 30mA and the action time should not exceed 0.1s. These two parameters ensure that the electrocuted body will not produce pathological physiological risk effect.The rated operating current of leakage protector should not exceed 10mA in the bathroom, swimming pool and other places.In the case of secondary accident caused by electric shock, the rated operating current of 6mA leakage protector should be used.

10. For the electrical equipment that is not allowed to be cut off, such as channel lighting in public places, emergency lighting, power supply for fire fighting equipment, power supply for anti-theft alarm, etc., the alarm type leakage protector should be used to connect the sound and light alarm signal, and inform the management personnel to timely deal with the fault.