At normal temperature, semiconductors have a certain electrical conductance due to the small energy gap and the formation of electron-hole pairs by thermal excitation. In contrast, most insulating ladders usually have a very large band gap width, and the valence band electrons are difficult to be excited to the conduction band, so the carrier concentration of the insulating ladder is extremely low, and accordingly the conductance is also very low, or this material insulation.

Before using the insulation ladder

1. Before using the ladder each time, you must carefully check the ladder surface, spare parts, ropes, etc. for cracks, serious wear, and damage that affects safety.

2. When using the ladder, you should choose a hard and level ground to prevent the danger of side-skew.

3. Check whether all ladder feet are in good contact with the ground to prevent slipping.

4. If the height of the insulated ladder exceeds 5 meters, be sure to set the F8 or more pull wire in the upper middle of the ladder.

5. Dizziness, dizziness, drunkenness or physical discomfort are strictly prohibited.

6. When working around the doors and windows, you must first fix the doors and windows to avoid opening and closing the doors and windows hitting the ladder.

7. When using ladders in windy conditions, use extreme caution or try not to use them.

8. Properly use the most suitable height of the ladder, never add or place anything on the ladder to increase the height.

9. Without the permission of the manufacturer, the ladder will never be attached to other structures, and the damaged ladder will never be used or repaired.

10. It is strictly forbidden to hold the cross brace when lifting the ladder to prevent cutting your fingers.