1. Electricians without relevant knowledge shall not dismantle the distribution box.

2. No sundries shall be piled around the distribution box, whether the metal fence is damaged, and whether the protective ground wire of the metal fence is firmly crimped.

3. Check whether the contact of switch and fuse is overheated, and whether the wiring insulation is damaged.

4. Check whether the electrical components in the distribution box are in good condition and whether the instrument indication is within the specified range.

5. Check the electrical system diagram in the distribution box and the circuit name marked by each switch for falling off.

6. The equipment out of service and the power circuit out of service shall be switched off and locked.

7. Clean the distribution box regularly.