Safety and Installation Standards for Outdoor Lighting

**Protection and Indirect Contacts**

Luminaires shall be Class I or Class II. Accessible metal parts of the luminaires will be connected to the ground. Excluded from this requirement are those metal parts with double insulation that are not accessible to the general public. For access to the interior of luminaires installed at a height less than 3 meters above the ground or in a publicly accessible space, the use of special tools will be required. All metal structures within a distance of less than 2 meters from the metal parts of the exterior lighting installation shall be joined together equipotentially. It must be ascertained whether these metallic elements can transfer dangerous voltage points to a distance (e.g., metallic). In which case, necessary preventive measures should be taken by isolating one party simultaneously accessible by isolating joints, by grounding separate metal structures, or other measures if necessary.

When the lights are Class I, they must be connected to the grounding point of the bracket with a unipolar insulated cable, rated voltage 450/750V, coated yellow-green, and a minimum section of 2.5 mm² of copper.

**Grounding**

The maximum grounding resistance should be such that over the life of the facility and at any time of the year, touch voltages cannot produce over 24V at the accessible metal parts of the installation (media, metal boxes, etc.).

Grounding of the supports can be made by a grid connection of common ground for all routes from the same table for protection, measurement, and control.

In networks of land, at least one grounding electrode will be installed every 5 luminaire supports, and always in the first and the last support of each line.

The driver of the ground network connecting the electrodes must be:

• Bare Copper, 35 mm² minimum section, if part of its own network of land, in which case it will go out of the drains of the power cables.
• Isolated by 450/750V nominal voltage cables, covered with yellow-green with copper conductors, minimum cross-section 16 mm² for underground networks, and the same section as the phase conductors for networks in which case go through the interior of pipelines, power cables.

The protective conductor connecting each support to the electrode, or with the network of earth, will be a unipolar insulated cable, rated voltage 450/750 V, coated yellow-green, and a minimum area of 16 mm² copper.

All connections to ground circuits shall be through terminals, fasteners, welding, or elements that ensure good contact and are protected against corrosion.

**Food Network**

**Cables**

The cables will be multi-polar or unipolar with copper conductors and a rated voltage of 0.6 / 1 kV.

The neutral conductor of each circuit as part of the picture may not be used by any other circuit.

**Types**

Underground Networks

Systems and materials similar to those of underground distribution networks regulated by the ITC-BT-07 will be used. The cables are of the properties listed in the UNE 21,123 and will go through tubes. Underground pipes should be as indicated in the ITC-BT-21, and the degree of mechanical protection as specified in the instruction, and may be concrete in a ditch or not. When concreting, the degree of impact resistance will be light as per UNE-EN 50,086 -2-4.

The pipes should be buried to a depth of 0.4 meters from ground level, measured from the lower bound of the tube, and the inside diameter should not be less than 60 mm.

A bandage is signaling that warns of the existence of public lighting cables, placed at a minimum distance from ground level of 0.10 m, now 0.25 m above the pipe.

In roadway crossings, channelization, in addition to piped concrete, will be installed at least one pipe reserve.

The minimum area to be used in the cable conductors, including neutral, is 6 mm². In three-phase four-pole distributions for phase conductors larger than 6 mm section², the neutral section shall be as shown in Table 1 of the ITC-BT-07.

Joints and referrals should be made on appropriate terminal boxes, placed into the brackets of the lights, and a minimum height of 0.3 meters above ground level or in a casket registerable, as it ensures both the continuity, insulation, and sealing of the driver.