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Electrical Wiring in the Home/3 way hall light with ft porch light

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Question
I have 2 switches on the wall inside my front door. One switch controls the ft. porch light outside, the other switch controls the foyer lights, which is a 3 way and can be turned on from the kitchen too.  there are (3) separate wires inside the box- they are: (2) 14/3 w/ground, and a 14/2 with ground. only one wire is hot inside the box- a black on one 14/3.
I changed the switch and tried to install designer switches. Ft. porch light doesnt work now .I guess its a type of 3-way circuit with a line for the ft. porch?

Answer
Professional electrical wiring never involves guesswork.
The most likely scenario is that the 3-wire with the hot black goes to the foyer light, where the hot comes from the kitchen switch box or a receptacle.
That black is supposed to feed both switches. Were there splices you took apart?
With those wires, the way I would have used them would be:
3-wire from foyer light
 Black- hot feed to front switch box connected to white of other 3-wire for 3-way (to carry feed to other switch) with black tail to feed single-pole for front door
 White neutral for front door light
 Red to 3-way switch common to control foyer light

2d 3-wire
 White hot, black and red travelers

2-wire
 White neutral to white of foyer light 3-wire
  Black to load side of single pole switch.

Built about 3, 000 houses wired that way
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Electrical Wiring in the Home

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Robert Wilber

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Licensed Philadelphia electrician serving Delaware, Chester, Montgomery and Philadelphia County in Pennsylvania. I install and repair residential, commercial and industrial wiring and lighting. Troubleshooting and repair of problems that stump other people is my favorite. I am willing to help people figure out why things don`t work. I understand motor controls, transformers and machine wiring. I do not teach basics to novices or do free design work.

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Experience in the area I have 44 years experience in residential, commercial and industrial electrical construction and repair, 480 volts and below. This is not to be confused with one week repeated two thousand times.

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44 years experience in residential, commercial and industrial electrical construction and repair

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