Meter Centralization: Installation & Regulations
Meter Installation and Centralization Requirements
1. When should fuses be installed in a single referral?
Before the counter.
2. What is the minimum conductor cross-section used for connecting measurement equipment?
6 mm2
3. What types of cables are used for connecting measuring equipment in a counter centralization?
450/750 V, copper, class 2 according to UNE-21,022, with dry extruded insulation based on thermoplastic or thermosetting mixtures.
4. What should be the color and cross-section of the cables used for command and control circuits in the centralization of counters?
Neutral: Blue, Protection (earth): Yellow/Green, Phase: Black or Brown (if the NIH has 3 phases, the 3rd is Gray), and the maneuvering conductor is Red.
5. When is a single meter used individually?
Only when it is for a supply to a single user or two users independently fed from one place.
6. In the case of manipulation of the measuring apparatus in an individual installation, when the meter is placed inside a home or premises, who is responsible?
The user, if the meter is within the dwelling.
7. In the case of manipulation of the measuring apparatus in an individual installation, when the meter is placed outside the premises or dwelling, who is responsible?
The owner of the building.
8. When is the placement of a dedicated room for housing counters and measuring equipment mandatory? What is the threshold?
When the number exceeds 16.
General Requirements for Meter Centralization Rooms
9. What are the general requirements for a room designed to accommodate the centralization of counters?
- Minimum height: 2.3 m
- Minimum width: 1.5 m
- Located on the ground floor, mezzanine, or first basement.
- Walls and floor of class M0, class M1
- Perfectly lit and ventilated, with a fire extinguisher nearby.
- According to compliance rule: NBE-CPI-96
10. What other premises can the room designed to accommodate the centralization of counters be located near, with the corresponding separation distance?
Boiler rooms, water meter concentrations, gas, telecommunications, machinery, or elevator storage. Garbage storage rooms.
11. Comment on this sentence: “Never use the premises for the centralization of counters; it can be installed in a semi-basement.”
It should be installed in a place closer to the entrance door. And it should be installed up to the semi-basement except when there is a concentration of counters on the floors.
Dimensions of Meter Centralization Rooms
12. What are the minimum dimensions for a room designed to accommodate the centralization of counters?
- Minimum height: 2.3 m
- Minimum width: 1.5 m
- The distance from the wall to the first obstacle in front must be 1.10 m.
- The distance between lateral concentrations is 20 cm.
13. When placing the meter concentration, what is the minimum distance from the bottom of the unit to the ground?
0.25 m
14. Which functional units do *not* correspond to a concentration of counters?
Functional unit of command and functional unit of telecommunications.
15. Which functional unit of a counter concentration is optional?
Functional unit of telecommunications.
16. What are the characteristics and power supply of the general power supply switch placed in the concentrated meter installation?
Minimum 160 A for load forecasts up to 90 kW and 250 A for more than this, up to 150 kW.