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T-5 white & grey wire #177080 04/21/08 07:32 PM
Joined: Mar 2001
Posts: 2,056
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Redsy Offline OP
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I've done T-5, 4-tube low-bays before and I seem to remember the white & grey ballast lead connected together at the factory with a push-in connector and a lead coming off to connect to the neutral of the supply

Is this correct?

I saw another brand that has black, white and gray, but they show the supply neutral connected to the white ballast lead, and also feeding a switch that connects the grey lead to the whites.

Is this just to switch 2 of the lamps separately?

If so, why is the switch loop in the neutral?

Thanks

Work Gear for Electricians and the Trades
Re: T-5 white & grey wire [Re: Redsy] #177105 04/22/08 07:27 AM
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Redsy Offline OP
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42 views and no opinions?

I forgot to mention that it is a single ballast for 4 lamps.

Last edited by Redsy; 04/22/08 07:29 AM.
Re: T-5 white & grey wire [Re: Redsy] #177107 04/22/08 08:14 AM
Joined: Apr 2002
Posts: 7,111
HotLine1 Offline
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Redsy:
OK, I'm the 43rd view, but sorry to say I can't help you on this.


John
Re: T-5 white & grey wire [Re: HotLine1] #177109 04/22/08 08:47 AM
Joined: Dec 2000
Posts: 4,281
electure Offline
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#49 here......Redsy, do you know the manufacturer?


Re: T-5 white & grey wire [Re: Redsy] #177120 04/22/08 02:34 PM
Joined: Sep 2005
Posts: 421
togol Offline
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although have installed a bunch of them I never looked inside at the ballast(s) until recently these 4 light Stoncos use a three lamp and single lamp ballast, which makes switching inside/outside impossible... so I am no help

I just assumed the electronic ballasts had no color code standards

I was actually stunned at the replacement cost of the three lamp unit..>$90


Tom
Re: T-5 white & grey wire [Re: Redsy] #177123 04/22/08 04:54 PM
Joined: Mar 2007
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oletimer Offline
New Member
I just finished installing several of these fixtures and the white and gray wire went to the neutral.I;m not sure why,but that's the only all 4 lamps would come on.


Work Safe
Re: T-5 white & grey wire [Re: oletimer] #177125 04/22/08 05:47 PM
Joined: Jan 2001
Posts: 1,044
Tom Offline
Member
Working from a rather feeble memory, if you connect the grey wire to the neutral (and possibly the hot) all 4 lamps will come on when power is applied to the fixture. The gray can be run through a motion sensor or other control device to provide dual level lighting.

Tom


Few things are harder to put up with than the annoyance of a good example.
Re: T-5 white & grey wire [Re: oletimer] #177126 04/22/08 05:51 PM
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Rewired Offline
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I have installed these fixtures before and yes it is to be able to switch 2 or 3 of the lamps independently.. WHY they choose to do this with the neutral puzzles me, but as far as I know and have read, this is the purpose of the grey wire.

I think perhaps it is intended for some sort of optional "occupancy sensing" system, where 1 or 2 out of 4 lights normally burn constantly but the remaining lamps are fired up when a person or object moves in the area below the fixture.

A.D

Re: T-5 white & grey wire [Re: Redsy] #177139 04/23/08 12:36 AM
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Redsy Offline OP
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Thanks, Guys!!


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