Are there any national standards or codes for power distribution rooms?

1. Testing, measuring or monitoring equipment for electrical safety protection detection of low-voltage distribution systems below 1V AC and 15V DC Part 2: Insulation resistance GB/T 18216.2-22;

2. Testing, measuring or monitoring equipment for electrical safety protection detection of low-voltage distribution systems below 1V AC and 15V DC Part 2: Insulation resistance GB/T 18216.2-22;

3. Low-voltage switchgear and controlgear Part III: Special requirements for low-voltage switchgear and controlgear-switchboard that non-professionals can enter the site (GB 7251.3-1997);

4. Low-voltage switchgear and controlgear Part V: Special requirements for cable junction boxes (CDCs) for outdoor public places. GB 7251.5-1998

5. Surge protectors (SPDs) for low-voltage distribution systems Part 1: Performance requirements and test methods GB 1882.1-22;

6. Electrical terminology: power generation, transmission and distribution power generation GB/T 29.52-2;

7. Electrotechnical terminology: Power generation, transmission and distribution substation GB/T 29.59-22;

8. Electrotechnical terminology: Power generation, transmission and distribution system planning and management GB/T 29.58-22;

9. Electrotechnical terminology Power generation, transmission and distribution operation GB/T 29.57-22;

1. Electrotechnical terminology General terms for power generation, transmission and distribution GB/T 29.5-1998;

11. Technical Guide for Live Working of Distribution Lines GB/T 18857-22

Your requirements are not specific. I have written everything I know. I hope it will help you.