General Protection Boxes and Protection and Measurement Boxes in Electrical Installations
Posted on Aug 6, 2024 in Technology
General Protection Boxes
1.2. Location and Installation
- Installed on exterior building facades with free and permanent access.
- Location determined by agreement between property owner and supplier.
- May use low voltage fuse box or distribution transformer as general protective box if building houses these components.
- For overhead connections, installed on surface at height of 3-4m.
- For underground connections, installed in wall niche with metal door and degree of protection IK 10.
- Bottom of door at least 30 cm above ground.
- Niche must have holes for underground conduit entrance.
- Location should be close to public distribution system and protected from other utilities.
- If facade does not border public highway, box located at boundary between public and private property.
- Maximum of two generic protection boxes per niche.
- Electrician or installer must notify supplier before accessing connections.
1.2. Types and Features
- Types listed in supplier’s technical specifications approved by public administration.
- Fuses installed in drivers or polar phase with power to cut at least equal to short-circuit current.
- Neutral with detachable connection to the left of the stage.
- Connecting terminal for grounding if necessary.
- Protection scheme depends on supply needs and type of power supply.
- General protective boxes for underground power may have input and output of distribution line.
- Meet requirements of UNE-EN 60,439 -1, UNE-EN 60,439 -3, UNE 20,324, and UNE-EN 50,102.
- Degree of protection IP43 and IK 08.
- Sealed.
Protection and Measurement Boxes
- Used for supplies with a single or two users fed from the same place.
- Combines protection and measurement equipment in a single element.
2.1. Location and Installation
- Applies as described in paragraph 1.1.
- Reading devices must be installed at a height between 0.7 m and 1.80 m.
2.2. Types and Features
- Types listed in supplier’s technical specifications approved by public administration.
- Meet requirements of UNE-EN 60,439 -1, UNE-EN 60,439 -3, UNE 20,324, and UNE-EN 50,102.
- Degree of protection IP43 and IK09.
- Sealed.
- Envelope must have internal ventilation to prevent condensation.
- Transparent reading material must be resistant to ultraviolet rays.