Light Bulb Base and the Light Fixture Socket
How to Identify the Positive and Negative Parts of a Light Bulb: Light Bulb Base and Fixture Socket, Electrical Tips about Light Bulbs and Fixture Wiring.© By: Dave Rongey
The Light Bulb Base and the Fixture Socket
[ad#block]Electrical Question: I would like to know more about the base of a light bulb.
- What are the positive and negative parts of a light bulb?
This electrical wiring question came from: Noel, a Homeowner from Mexico.
Thanks for your electrical wiring question Noel.
Light Bulb Base and Fixture Socket
How to Identify the Positive and Negative Parts of a Light Bulb
Great question Noel, this is something most people do not understand.
- Basically the standard screw base light bulb has two areas that come into contact with the light fixture lamp socket.
- At the very end of the light bulb is the small round tip which is the positive contact surface.
- The outer threaded part of the base is the negative connection contact surface.
- These two parts are generally insulated by the glass base of the light bulb.
- Because the positive area is at the tip location of the light bulb, this helps prevent a person from receiving a shock if the were to unscrew a burnt out light bulb and their hand would come into contact with the side base of the light bulb or socket.
Electrical Tip about Light Bulbs and Fixture Wiring
- Always be sure to connect the wires of a light fixture correctly otherwise you may be energizing the negative part of the light bulb instead of the positive center tip.
See more about Identifying the Wires of Flat Cords
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