Lighting Circuit Design

Power is taken from the consumer unit to the first junction box.

Lighting circuit design. Some light units incorporate their own switch for these fittings the power circuit is then connected directly to the fitting. In professional field proper lighting design is very important because an under lighting arrangement will decrease the efficiency of the task for which the lightings were designed and an over lighting arrangement will result in over expenditure of the company. It uses a 2 core earth cable between the two switches instead of the more typical 3 core earth cable. In addition to the circuit design best practices for the installation of these lighting systems will be addressed in a case study of what works well and what doesn t participants will gain a better understanding of the types of electrical circuits and the various components utilized on the airfield to keep the lighting systems operational.

The lighting cable is routed from the consumer unit to a series of lighting points for ceiling roses or wall light fittings. In order to energise the light we need to connect it to the supply available. The second system in popular use is the junction box circuit or system. This type of lighting system uses toggle latching switches.

These are basically multi point radial circuits that can take two forms and are often a combination of both of these. The requirements of a lighting application often dictate what type of circuit can be used but if given the choice the most efficient way to run high power leds is using a series circuit with a constant current led driver. How to do lighting design calculation in a building electrical wiring installation. Running a series circuit helps to provide the same amount of current to each led.

The live is interrupted by the switch wiring and the circuit is carried on to the next junction box. On small scale this difference is not too much. The power to each lamp is connected via a wall or ceiling mounted switch. Phase neutral and ground all three conductors reach to the terminal point of each luminaire and if it has a metal chassis the ground should be connected in the appropriate position.

A cable is run from the junction box to the light usually via a ceiling rose. Type one lighting circuit. Introduction to lighting circuits. Electrical lines which include lighting circuits begin from the main distribution panel of the installation and each line contains three conductors.

As you can see a basic lighting circuit consists only of three components. Loop in lighting circuits have a cable that runs from the consumer unit and out to several ceiling roses which directly link to each lighting pendant and its switch. This is usually a distribution board of some sort. You work out the current that the appliance uses the you apply diversity by taking the first 10a then add on 30 of the rest and add on 5a if there is a socket outlet on the end of the cooker circuit.

Supply switch and light.