1. The installation, inspection and acceptance of electrical installations shall comply with the current relevant standards and specifications for fire protection and environmental protection.
2. When the project is accepted, the following items should be inspected:
1 The leakage switch is installed correctly and the operation is normal.
2 The insulation resistance of each circuit should be greater than or equal to 0.22 MΩ. The protective ground wire (PE wire) should be reliably connected with uncharged metal parts.
3 The installation and fixing of electrical devices and equipment should be firm and flat.
4 electrical power test, lighting test and lighting control performance is good.
5 The appearance of the switch, socket, terminal box and other devices is good, the insulation device is crack-free, and the installation is firm and flat. The installation method is in compliance with the regulations.
6 The deviations of the switches, sockets, and terminal boxes installed side by side, the clearances of the concealed switches, sockets, terminal boxes, and the perimeter of the box are in compliance with the regulations.
7 The weak current system is fully functional and satisfies the requirements for use. The appliance is securely mounted and leveled.
3. When the project is handed over for acceptance, the following information should be submitted to the household:
1 wiring diagram, the drawing should indicate the direction of the dark pipe (including height), conductor cross-sectional area and specifications.
2 leakage switch, lamps, electrical equipment installation instructions, certificate, warranty card and so on.
3 Installation of weak current system Operation instructions, certificates, warranty cards, commissioning records, etc.
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A pipette, also known as a pipette gun, is a device used to quantitatively transfer liquids. When conducting research in analytical testing, a small or trace amount of liquid is generally removed with a pipette. Pipettes can be divided into gas piston pipettes (Air-displacement pipette) and external piston pipettes (Positive-displacement pipette) according to the principle. Gas piston pipettes are mainly used for standard pipetting, and external piston pipettes are mainly used to handle special liquids such as volatile, corrosive and viscous. Many people ignore the correct use of pipettes and some of the details.
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