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-   -   Fuse trips when I switch the light off (http://www.diychatroom.com/f18/fuse-trips-when-i-switch-light-off-163144/)

gshine 11-12-2012 08:50 PM

Fuse trips when I switch the light off
 
I wanted a light in the closet - There is a socket in the closet. I wired frorm the closet receptacle (black to black, white to white) to a single pole switch and from there to a wall mounted light which only has a black and a white connection (no ground on the new ligth socket or the new switch).

The light comes on fine but when I switch it off the fuse trips?

Nothing is touching and I have tried it with and without the ground from the receptacle.

Any hekp appreciated.

Jim Port 11-12-2012 08:54 PM

The ungrounded wiring should not have been extended.

Does your light fixture have the proper clearances from the shelves? What type of fixture did you install?

tduncanlu1077 11-12-2012 08:58 PM

The switch only has 2 terminals not 3? It doesn't have a black screw?

joecaption 11-12-2012 09:02 PM

Can not have an exposed light bulb in a closet.
Not suppost to extend an ungrounded wire.
How did you wire this switch?
In fact let the guys in on how you ran all the wiring.

AllanJ 11-12-2012 09:15 PM

You made a mistake in your wiring.

By the way, the neutral wire is not supposed to be connected to any switch terminal. In your case you created a short circuit when you flipped the switch down which is really the on position the way you installed the switch.

joed 11-12-2012 10:30 PM

You not switching it off you are turning the switch on to trip the fuse. Tell us how you wired the switch.
If you went from the receptacle to the switch to the light then you should only have one black wire on each switch screw and the two whites connected together and NOT to the switch..

gshine 11-13-2012 12:31 AM

fuse trips
 
I have the black and white from the receptacle (outlet) going to the switch. The switch only has two silver screws for connection.

I then connect the light outlet which is an LH-1P 250W light fitting which screws straight onto the wall.

It has a silver and black - I connect the black cable from the switch to the black screw and the white cable from the switch to the silver screw.

If I understand this right I need the black from the receptacle to go to the switchand from there to the light. The white cable from the receptacle should go directly to the light (silver screw) and then back to the switch?

Sounds right?

Gary

k_buz 11-13-2012 05:33 AM

250 W in the closet? Seriously?

AllanJ 11-13-2012 06:01 AM

Quote:

Originally Posted by gshine (Post 1051019)
If I understand this right I need the black from the receptacle to go to the switchand from there to the light. The white cable from the receptacle should go directly to the light (silver screw) and then back to the switch?

This is correct.

gshine 11-13-2012 06:39 AM

Laws
 
So the switch only has two black wires connected to it - Essentially a circuit in series rather than parallel. This breaks the black live wire with an on/off switch.

Am I breaking any laws by coming straight off receptacle to a light fitting?

gshine 11-13-2012 08:12 AM

All working
 
All woking now and added in a motion sensor switch which works great -

Final question on this.

Why does the earth wire not need to come off the receptacle to the switch and light?

Thanks.

AllanJ 11-13-2012 08:51 AM

Quote:

Originally Posted by gshine (Post 1051118)
Why does the earth wire not need to come off the receptacle to the switch and light?.

The bare and/or green earth wires (equipment grounding conductors) are required in cables nowadays and are connected together wherever they come together. In additon the frame (yoke) of the receptacle and the box, if metal, must have one of those wire ends attached to it.

When two wire ends want to go under one screw, cut a short length of wire (pigtail) of the same color and attach it to the screw. Then attach the other end to the other wire ends in question. It is better not to use the hole connections at the back of the receptacle or switch unless there is a clamp inside activated by a screw.

Although circuits without earth wires may continue to exist or may be modernized piecemeal, no additions may be made to those circuits where the path from the new section back to the panel relies on an unmodernized section of wiring.

gshine 11-13-2012 08:56 AM

Confused.
 
Now I am really confused. A previous post said no earth (bare in my case) should be forwarded from the receptacle to the switch or light. Both the switch and the light and the box holidng the light switch are all plastic throughout?

Could you specify exactly what should connect to what on the earth side please.

AllanJ 11-13-2012 09:24 AM

When the switch has metal tabs to fasten to the box, there is usually a green screw on one of these tabs to attach the earth wire to. Without a green screw you can squash the looped end of the earth wire end between the metal tab and the plastic box when you install the switch in the box.

If there is no screw terminal or metal framework or green wire on the light fixture to attach the cable earth wire to, just curl up the latter in the box for future use. Do not disassemble a switch or light fixture to find metal framework unless the instructions say to do that.


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