Here is Connecting Lamps in Series and in parallel, In every electrical wiring they are different ways in which the connection can be made.
Hence, for the course of this training we will be focusing on series and parallel system of wiring used in connection of lighting point.
Aim:
To acquaint students on how to wire lamps in series and in parallel.
Background of Connecting Lamps in Series and in parallel
Connecting Lamps in Series and in parallel, In a series circuit the same current flow through the conductors but the voltage drop
Across each is different due to its difference resistance and the sum of the voltage is equal to the voltage applied across the two conductors.
Connecting Lamps in Series and in parallel, In parallel circuit voltage across all conductors is the same but the current in each
Conductor is different and the total current is the sum of the two separate current.
series connections of two Lamps controlled by one switch
Connecting Lamps in Series and in parallel, Summary for series connection on testing:
- Each lamp has only 240/2 i.e120v across it for this reason each lamp glows dimly.
- “If another lamp of similar rating is added in series with the other two lamps than
- Each lamp now has 240/3 i.e. 80v across it and each now glows even more dimly.
- If one lamp is removed from the circuit or if one lamp develops a fault (.i.e. an
- Open circuit) or if the switch is opened, then the circuit is broken. No current
- Flows and the lamps will not light up.
- Less cable is required for a series connection than for a parallel connection.
Application
The series connection of lamps is usually limited to decorative lighting
Such as for Christmas tree lights.
Two Lightening point controlled by one switch in Parallel
Summary for parallel connection on testing:
- Each lamp has 240V across it and thus each glow brilliantly at their rated voltage.
- If any lamp is removed from the circuit or develops a fault (open circuit) or a
Switch is opened the remaining lamps are unaffected.
- The additions of further similar lamps in parallel do not affect the brightness of
The other lamps.
- More cable is required than that of series connection.
Application
It is widely in Electrical installations.
Tools
- Hammer
- A set of screwdrivers
- Drilling tool
- Insulated pliers
- Side cutter
- Electrician’s knife
- Multi-Meter
Materials
- A board of plywood – 1
- A length of PVC cable
- Cable clips
- 1” nails
- 1″ screw nails
- Joint box – 1
- Toggle switch – 1
- Lamp holder – 2
- Cero tap
- 60-W bulb – 1
- Supply voltage 240v
Procedures for Installation of Lamps in Series
- Assemble the tools and materials for the exercise.
- Place the joint box in the middle of the board and tight it firmly.
- Place the two lamp holder at one end of the board and connect live cable to a point labeled L, and connect the neutral cable to a point labeled N. and tight both firmly.(note: label your lamp holder lamp1 and lamp2, link lamp1 and lamp2 together and then connect the live phase to (L) and neutral which is always the black cable to (N).
- Hint; clip the cable from the two lamp holders into the joint box.
- Place the switch at another end of the board and connect live to (L) and neutral to (N) and clip the cable into the joint box.
- Clip the supply cable (MAINS) on board from another end into the joint box.
CONNECTION
- Connect LIVE of the supply to the LIVE of the switch.
- Connect BLACK of the switch to the LIVE of the lamp holder.
- Connect BLACK from the supply to the BLACK of the lamp holder.
Note: Cero tap all the connections.
Note
Test the installation for confirmation with your multi-meter before supplying light into the circuit.
Installation of Lamps in Parallel
- Assemble the tools and materials for the exercise.
- Place the joint box in the middle of the board and tight it firmly.
- Place the two lamp holder at one end of the board and connect live cable to a point labeled L, and connect the neutral cable to a point labeled N. and tight both firmly.(note: label your lamp holder lamp1 and lamp2. Connect lamp1 live phase to (L) and neutral phase (N) and Connect lamp2 live phase to (L) and neutral phase (N)
- Hint; clip the cable from the two lamp holders into the joint box.
- Place the switch at another end of the board and connect live to (L) and neutral to (N) and clip the cable into the joint box.
- Clip the supply cable (MAINS) on board from another end into the joint box.
CONNECTION
- Connect LIVE of the supply to the LIVE of the switch.
- Connect BLACK of the switch to the LIVE of the lamp holder.
- Connect BLACK from the supply to the BLACK of the lamp holder.
Note
Test the installation for confirmation with your multi-meter before supplying light into the circuit.
Note: Cero tap all the connections.
CONCLUSION
The purpose of this training is to show us the different ways in which lamp connections can or will be made and also the area where it’s applicable.