×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

LED tube retrofit question

LED tube retrofit question

LED tube retrofit question

(OP)
We are planning a major retrofit of one of our buildings, a public library. The plan is to retrofit all of the 4' fluorescent fixtures with LED type tubes. I would think the tubes used won't require a driver, so the fluorescent ballast will be removed, and line voltage brought to one end of the fixture, with 120v to each tombstone at one end, and the other end just capped off.

My question is there any concern about the tombstone socket having 120v? I know in the past I have replaced fluorescent lamps and found the sockets broken with the tabs exposed. The plastic could be brittle, broken, or not there. Are the existing sockets listed/approved for this use? Are there new sockets UL listed/approved for this use?

Another question I have, is about the use of the disconnect requirement in the code. I think this requirement is for all linear luminaires, so if there is not one existing, there will have to be one installed at the time of the retrofit, right? I usually install those lightweight pull apart disconnects, but those are inline with the smaller sized wire that is feeding the ballast, not the branch circuit. Thoughts?

Thanks

RE: LED tube retrofit question

Thank you mcgyvr!

Best to you,

Goober Dave

Haven't see the forum policies? Do so now: Forum Policies

RE: LED tube retrofit question

(OP)
Thanks for the links.

I just read an article about this subject in this month's EC & M magazine. There was a link to DOE's CALiPER study. It is pretty interesting.

Thanks again.

Rick Miell

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

White Paper - Strategies to Secure Connected Cars with Firewalls
White-hat hackers have demonstrated gaining remote access to dashboard functions and transmissions of connected vehicles. That makes a firewall a vital component of a multilayered approach to vehicle security as well as overall vehicle safety and reliability. Learn strategies to secure with firewalls. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - What is Generative Design and Why Do You Need It?
Engineers are being asked to produce more sophisticated designs under a perfect storm of complexity, cost, and change management pressures. Generative design empowers automotive design teams to navigate this storm by employing automation, data re-use and synchronization, and framing design in the context of a full vehicle platform. Download Now
eBook - Simulation-Driven Design with SOLIDWORKS
Simulation-driven design can reduce the time and cost of product development. In this engineering.com eBook, we’ll explore how SOLIDWORKS users can access simulation-driven design through the SOLIDWORKS Simulation suite of analysis tools. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close