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converting T12 lamps to T8 lamps?? #81458 08/19/02 02:05 PM
Joined: Aug 2002
Posts: 2
A
All Lites Offline OP
Junior Member
What I have exsisting is a 4 lamp 4 foot fixture with two magnetic ballasts. As it is now, they are switched, 2 lamps per switch. I'm converting it over to a electronic ballasts. Can I use a single electronic to run all four lamps as opposed to running two ballasts switched? Or is there a code that I have to keep them switched? Thanks in advance for any help offered. I'm in CA btw.

2017 / 2014 NEC & Related Books and Study Guides
Re: converting T12 lamps to T8 lamps?? #81459 08/19/02 04:33 PM
Joined: Apr 2002
Posts: 7,211
HotLine1 Online Content
Member
AllLites:
It's common here to install 1-4lite T8, F32 ballast to replace 2-2lamp T12 F40 (F34) ballasts.
CA may have an energy code, requiring "split wired" fixtures.
It's best to check with the local AHJ, or utility Co.
HotLine1
John


John
Re: converting T12 lamps to T8 lamps?? #81460 08/19/02 05:28 PM
Joined: Jan 2002
Posts: 163
D
dana1028 Offline
Member
All - CA does have their Title 24 - Energy Conservation code requirements - (this is a large body of law covering lots of areas - I don't have the particular legal citation but any bldg. dept. will have that information for you ) this 'split' switch is a requirement.

Re: converting T12 lamps to T8 lamps?? #81461 08/19/02 07:48 PM
Joined: Oct 2000
Posts: 2,721
Scott35 Offline
Broom Pusher and
Member
Contact me via e-mail and I can give you some links for Title 24.

Basically you will need to retain "Bi-Level" switching, which cuts 1/2 the lighting power [half of the total lights per room or area].
This can be done by either using 2 lamp ballasts in each fixture, or creating a "Checkerboard" making every other fixture on the opposite switch. Checkerboard method allows you to use 4 lamp ballasts, but does not end up as uniform as the "A/B Per Fixture" method does.

Sounds [Linked Image] or maybe [Linked Image]

Contact me via e-mail at:
dtbigred@pacbell.net

Scott S.E.T.


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!
Re: converting T12 lamps to T8 lamps?? #81462 08/20/02 11:13 AM
Joined: Aug 2002
Posts: 2
A
All Lites Offline OP
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Thanks gentlemen! Scott you have mail


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