What cable is used for emergency lighting?

What cable is used for emergency lighting?

Emergency lighting for a house

Forgive my ignorance but, can I connect the emergency lighting (with autonomous devices) and the normal lighting in the same line protected with a circuit breaker or do I have to make a protected line with its own I. Magneto. for each lighting? In the ITC-28 I have not seen anything that does not allow me to do it but in several projects I have seen that normally if it is separated, but in the installation that I am doing (a garage in Murcia) the emergency lighting and normal lighting have the same route and I thought that with only one line for both would reduce the cost a lot.

The logical thing would be to connect the autonomous devices of emergency lights to the same circuit of illumination, so that when lacking tension, these are activated, and during at least one hour they illuminate the room.

What can also be done is to connect all these emergency lamps in a separate circuit, which has a 10 amp circuit breaker at the head (wired circuit with 1.5 mm^2), and this circuit breaker hang it from the output of the lighting circuit breaker. This thermomagnetic circuit breaker would be used as a switch, apart from protecting the line of these luminaires. Its usefulness lies in effecting a cut of tension in these lamps and to provoke its ignition, without need to leave the room to dark.

Where to place emergency lights

As it is indicated in the Electrotechnical Regulation for Low Voltage, in its Complementary Technical Instruction 28, emergency lighting is the one that must come into operation automatically when the general lighting fails or when its voltage drops to less than 70% of its nominal value, and it is called automatically with short cut-off times ≤ 0.5 seconds. WHAT IS ITS PURPOSE? The purpose of the emergency lighting is:

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Generically in ITC-BT 28 some premises are identified which must always have emergency lighting.In order to provide adequate lighting the luminaires will meet the following conditions:

Types of emergency lighting

According to current regulations, in case of failure of conventional lighting, there must be emergency lighting to provide the necessary and sufficient visibility to users, so that they can leave the building safely and calmly.

This regulation extends the obligation of emergency lighting to offices and commercial premises, warehouses or homeowners’ associations, as well as workplaces where a lighting failure could compromise the safety of workers.

A distinction is also made between permanent and non-permanent emergency luminaires. While the former remain on at all times and are intended for recreational activities, shows, etc., the latter are the most frequent and are only activated in the event of failure of conventional lighting. For more information you can consult our entry on Types of emergency lighting.

The installation is very similar to that of any other type of luminaire. Once fixed to the wall and inserted the colored conduits in the corresponding terminals, mounted and activated the current, the battery will be recharged by means of the electricity of the network.

Emergency lighting Peruvian standards

If you do not follow the necessary recommendations, you run the risk of overheating a line, to damage a device, luminaire, driver and the most dreaded: to burn an electrical installation completely.

Electrical cables are composed of the conductor, the insulation, a filler layer and a sheath. Each of these elements that make up an electrical cable serves a purpose that we are going to know below:

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It is a single wire in a solid state, it is not flexible and has no sheathing, an example of use this type of conductor is the use for grounding in conjunction with grounding rods.

The flexible electric cable is the most commercialized and the most applied, it is composed of a multitude of fine wires covered by plastic material. They are so flexible because they are many thin wires instead of a fat conductor wire, so they can be easily bent, they are very malleable.

It is possible to identify the type of isolation that has a cable in the inscriptions that appear on it, they are abbreviations of the English. The cables used for installations in homes and offices are: THN, THW, THHW and THWN. The meaning of these abbreviations is as follows:

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