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-   -   Wiring - power to light then switch (http://www.diychatroom.com/f18/wiring-power-light-then-switch-159400/)

dcj710 10-08-2012 01:02 PM

Wiring - power to light then switch
 
1 Attachment(s)
Got cable running from the panel. Nothing on circuit presently.

Like to use the circuit to
1. install a light operated by a switch
2. replace the 220 AC receptacle (no longer needed) with 110 receptacle
3. add another receptacle before or after the switch.

I'd like to use the three existing cable runs, which means the power will run from the panel to a junction, then the light / switch / replacement receptacle (see pic).

I'll add the new receptacle near the switch later.

Cable from new ceiling light not shown... Black, White, and Ground.

Question is, does power going into the light first affect the wiring to the switch?

Dave632 10-08-2012 03:19 PM

1 Attachment(s)
Quote:

Originally Posted by dcj710 (Post 1026548)
Got cable running from the panel. Nothing on circuit presently.

Like to use the circuit to
1. install a light operated by a switch
2. replace the 220 AC receptacle (no longer needed) with 110 receptacle
3. add another receptacle before or after the switch.

I'd like to use the three existing cable runs, which means the power will run from the panel to a junction, then the light / switch / replacement receptacle (see pic).

I'll add the new receptacle near the switch later.

Cable from new ceiling light not shown... Black, White, and Ground.

Question is, does power going into the light first affect the wiring to the switch?

Yes.

You will need to wirenut the incoming black to the black in the cable going to the switch. At the switch, connect the black to one terminal and the white to the other. Mark the white with a black piece of tape to indicate it is NOT a neutral. The white/black then carries the switched hot line back to the light fixture, where you again mark it with black, and connect it to the black wire from the fixture.

Techy 10-08-2012 03:26 PM

he has xx-3 going to the switch, make up all blacks/whites/grounds together with the like wires, use the red from the switch to feed the light.

Dave632 10-08-2012 03:45 PM

1 Attachment(s)
Sorry, missed that.

dcj710 10-08-2012 06:10 PM

Not using the red at either end (xx-3 is existing cable; using it instead of running new cable). So Dave632's first diag should work. But it doesn't. I get light all the time; switch doesn't affect it.

dcj710 10-08-2012 08:02 PM

still not working
 
I've looked at Dave's diag (not using red wire to switch - per Techy's xx-3 comment) and ck'd the connections a few times. New switch, but replaced that anyway. I'm missing something.

The light goes on with the breaker. But it does NOT shut off at the switch. ???

Gac66610 10-08-2012 08:26 PM

Quote:

Originally Posted by dcj710 (Post 1026871)
I've looked at Dave's diag (not using red wire to switch - per Techy's xx-3 comment) and ck'd the connections a few times. New switch, but replaced that anyway. I'm missing something.

The light goes on with the breaker. But it does NOT shut off at the switch. ???

It would be better to use the red conductor.

At the light, black to black ... white to white (tie whites to fixture), red to switch and light, cap the white at switch.

sublime2 10-08-2012 08:33 PM

Connect the blk from panel to black "old ac" with white to switch. Connect blk switch wire at jb to fixture,connect white fixture wire to all remaining whites in jb and wire not. Connect blk and white at switch to screws and mark white with black tape.

k_buz 10-08-2012 09:12 PM

Is there any other cables at the switch? or just the 3-wire?

It appears you didn't get the correct advice here if you are adding a receptacle coming off the switch.

Connect the all the blacks together
Connect all the whites together
Red and black to the switch, cap the white for a future neutral
Black of the fixture to the red in the ceiling
White of the fixture to the 3 whites in the ceiling

sublime2 10-08-2012 10:14 PM

Quote:

Originally Posted by sublime2
Connect the blk from panel to black "old ac" with white to switch. Connect blk switch wire at jb to fixture,connect white fixture wire to all remaining whites in jb and wire not. Connect blk and white at switch to screws and mark white with black tape.

Since you stated your not using the red ( only there because that's the wire you have available)
If there was no red wire the above would also work.

dcj710 10-08-2012 10:36 PM

No other cables at the switch.

And yes, I'd like to add a receptacle later. Receptacle could be located just before or just after the switch...either would be OK.

dcj710 10-08-2012 11:22 PM

Still not right...
 
Quote:

Originally Posted by k_buz (Post 1026956)
Is there any other cables at the switch? or just the 3-wire?

It appears you didn't get the correct advice here if you are adding a receptacle coming off the switch.

Connect the all the blacks together
Connect all the whites together
Red and black to the switch, cap the white for a future neutral
Black of the fixture to the red in the ceiling
White of the fixture to the 3 whites in the ceiling

Just finished trying the above...still not right. Light's on with the breaker; off with the breaker.

Switch doesn't turn the light off.

Replaced the switch again (3rd one).

I'm doing something wrong, but damned if I can see what it is. Maybe it'll look different in the morning.

Oso954 10-08-2012 11:59 PM

1 Attachment(s)
Try this. Grounds not shown.

hammerlane 10-09-2012 05:53 AM

1 Attachment(s)
Oso954's diagram will work. Below is simialr only that the outlet(receptacle) is after the switch.

dcj710 10-18-2012 07:41 PM

got it working
 
Changed the switch (second time). Replacement switch was bad.


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