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Old 12-08-2011, 01:45 PM   #1
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plastic outlet boxes and fixture/chandelier wiring


Greetings,

Have a few electrical questions for a addition we are renovating.

1) plastic outlet boxes..whats the rule of thumb on them? have a 4 wire outlet in the fall that has hot coming in and feeds out to a baseboard heater..should it be metal?

2) I'm having trouble with a chandelier..im getting conflicting info on how to wire, specifically ive read that, for the two wires for the fixture, (clear/silver coating on both) the wire with the writing is "black" and the ribbed one is neutral..and ive read visa versa. On this fixture the wire with writing is smooth and the other w/o writing is ribbed.

Is there a standard rule of thumb?

Thanks!

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Old 12-08-2011, 01:58 PM   #2
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plastic outlet boxes and fixture/chandelier wiring


Metal or plastic is a matter of choice, depending on the wiring method.

The ribbed wire is the neutral wire.

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Old 12-08-2011, 02:36 PM   #3
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plastic outlet boxes and fixture/chandelier wiring


thx! the plastic box (i took out 1950's old metal outlet box) has 4 wires coming out of the thermostat control that connect to the 4 wires entering the box..its older 14guage wire i think..i used wire nuts and electrical tape and kept it clean..not sure if that helps or makes a difference. the thermo/feeds are wired correctly fyi, just have the box question.

one more question if i may..for the chandelier, thx for the hot/neutral info...the ceiling junction box again is a 4wire setup...2 black/white pairs...out of the two blacks only one is reading hot. im guessing the other black white pair that reads zero current is the feed to the main lightswitch..the two pairs right now are each capped and not connected to anything..

so, i understand black/neutral from the fixture..and i know the hot wire in the ceiling, but how/where do i include the light switch feed so that it turns the fixture on off..if i just went to the hot blsack and associated neutral it would just be constantly on.

if we name the hot black A and the white of this pair B, and the switch black C and the associated neutral D (and black from fixture 1 and neutral from fixture 2) would i splice together A+C+1 then B+D+2?

Thx!


black that goes to the main lightswitch
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Old 12-08-2011, 03:56 PM   #4
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plastic outlet boxes and fixture/chandelier wiring


Is a black and a white connected to the light switch on the wall? Was there a black and a white spliced in the ceiling box?
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Old 12-08-2011, 06:36 PM   #5
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plastic outlet boxes and fixture/chandelier wiring


black and white at switch yes..single pole.

the orig wiring in the ceiling contained a metal conduit with two pairs of black and white..was older thicker 12 or 14 guage i think. one pair had thinner 14 or 16 guage attached to one pair that fed into a fixture. the other pair was still in the conduit..maybe attached to something but i never saw.

we had the ceiling redone by a contractor and i cannot recall the exact old setup. as stated right now we have two pair of black and whites, all capped off with only one black registering as hot. the two wires at the switch are not registering any juice at all.
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Old 12-08-2011, 06:45 PM   #6
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plastic outlet boxes and fixture/chandelier wiring


The conduit with the hot black wire in it we'll call the "power" conduit, and the other conduit we'll call the "switch" conduit.

Hot wire from the power conduit connects to the white wire in the switch conduit. White wire from the power conduit goes to the light fixture's neutral wire. Black wire from the switch conduit goes to the light fixture's hot wire. Light fixture's ground wire connects to a grounding screw in the box.
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Old 12-08-2011, 07:01 PM   #7
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wow thanks! just to be clear, based on my naming conventions posted earlier:

(the hot black is A and the white of this pair B, the "non hot" black in the ceiling (and presumably the black in the switch) is C and the white of this pair D..the black from fixture "1" and neutral from fixture "2")

then

A+D
B+2
C+1?
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Old 12-08-2011, 07:03 PM   #8
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Correct.
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Old 12-08-2011, 07:05 PM   #9
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Oh, and the white wire to the switch should be marked black with sharpie in the fixture box and the switch box.
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Old 12-08-2011, 07:09 PM   #10
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many many thanks!
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Old 12-09-2011, 06:28 PM   #11
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eek - wired as discussed and when i throw the main breaker the fuse blows...

hmm...it's not taking
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Old 12-09-2011, 06:33 PM   #12
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Okay, are there other wires in the switch box, or is it only the black and white connected to the switch?
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Old 12-09-2011, 06:45 PM   #13
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plastic outlet boxes and fixture/chandelier wiring


the wall switch? standard black white and ground..single pole
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Old 12-10-2011, 11:04 AM   #14
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plastic outlet boxes and fixture/chandelier wiring


Alright, now I'm confused.

Just to make sure I've got this right; at the light fixture box, you've got two conduits coming in, each with a black and a white wire. At the switch box, you've got one conduit or cable coming in with a black and a white wire. No other wires are present in either box (except for ground wires). Is that right so far?
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Old 12-10-2011, 01:51 PM   #15
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100% correct

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