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Scaramanga007

11:44AM | 02/28/05
Member Since: 02/26/05
1 lifetime posts
Bvelectrical
Hello- I am remodeling my closet, and bought a new fluorescent light to replace the single bulb fixture. My problem is, parts of the wiring in my house is ancient, and the wiring to this light is only "two wire", with no ground wire. The instructions say the unit "will not operate properly unless connected to a grounded electrical circuit. Electric shock, over heating, low or no light output, and shortened lamp life can result if proper grounding is not done." My question is, do I have any alternatives to installing new wiring to the light location? Will it be dangerous if I do not hook up the ground? The electrical service (breaker panel) has been updated in the home and some of the wiring, particularly to the kitchen, has been updated. However, not all the wiring has been replaced in the home. Just the "easy to get to" wiring. My home is 100 years old this year! Help!


Tom O

02:22PM | 02/28/05
Member Since: 09/17/02
477 lifetime posts
Beieng a firm believer in following instructions (at least when they apply to electrical work) I recommend that you come up with an equipment ground.

You have several ways of approaching this.

Run a ground wire to any accessible point on the grounding electrode system

Run a ground wire to any accessible point on the grounding electrode conductor

Run a ground wire back to theequipment ground terminal bar in the panel that feeds this circuit.

Run a ground wire back to the neutral bar in the service disconnect enclosure (main panel in your house).

Under the 2005 NEC, you could skip running a ground wire if you provided ground fault protection for this fixture, but that still wouldn't help you with possible hard start problems.

Running a new cable with an equipment ground in it to the light fixture from your panel will probably be about the same amount of work as running a ground wire by itself, so now is a good chance to get rid of another piece of old wire.

Tom

Wireman

08:46AM | 03/05/05
Member Since: 12/19/04
62 lifetime posts
007, you didn't state what the wiring looked like that was in the box that the original light fixture hung from. Is it a steel box with bx cable entering? The cable would not have a ground wire in it to attach to the new fixture but the box is grounded throught the cable and you would just install a ground wire to the back of the box with a 10-32 screw. Look at your main service and see if the cabling entering your service panel is BX or flexible steel cabling. This is a grounded system and you would install that ground wire to the box. A simple way to test for that ground is to take a tester between the black wire and the box. If you get a reading the box is grounded. Hope this helps.

Ron
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