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One way lighting circuit?
Can anybody tell me the functions of the circuits and why the cables and protective devices have been chosen for installation?
Thanksyou if you can.
1 Answer
- Paul FLv 69 years agoFavorite Answer
It will help if you describe your question with more detail.
In a home (USA) there are two types of 120 V outlets: 15 A and 20 A, Single Phase.
In some homes there are also 240 V Two-phase outlets.
The wiring for 15 A is done with wire gauge #14 and that of 20 A with gauge #12.
The Circuit Breakers are 15 A and 20 A respectively.
The breakers protect the wiring from overheating causing a fire.
The type of cable used is called Romex and consists of three wires Black for Hot; White for Neutral and Bare Copper for Ground.
#14 wire has some resistance, so at 15 A there will be a few volts drop, which will slightly raise the temperature of the wire due to the power being dissipated in it.
The same goes for #12 wire at 20 A. #12 has less resistance than #14 but the current is higher, causing a similar power dissipated.
Added: I noticed that you are asking a similar question in the Engineering category.
There you mention One-way and Two-way wiring.
One-way is for a Light Bulb turned ON and OFF by a single switch.
Two-way is for a Light Bulb that is turned ON and OFF from two different locations. For instance from the bottom and top of a staircase.